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       "<style>svg.learning-curve {\n",
       "    width: 100%;\n",
       "    shape-rendering: crispEdges;\n",
       "    font-size: 14px;\n",
       "}\n",
       "\n",
       "svg.learning-curve .tick text {\n",
       "    font-size: 14px;\n",
       "    fill: #505050;\n",
       "}\n",
       "\n",
       "svg.learning-curve .tick line {\n",
       "    stroke-width: 2;\n",
       "    stroke: #505050;\n",
       "}\n",
       "\n",
       "svg.learning-curve .background {\n",
       "    fill: #EBEBEB;\n",
       "}\n",
       "\n",
       "svg.learning-curve .facet {\n",
       "    font-size: 14px;\n",
       "}\n",
       "\n",
       "svg.learning-curve .facet-background {\n",
       "    fill: #D9D9D9;\n",
       "}\n",
       "\n",
       "svg.learning-curve path.line {\n",
       "    fill: none;\n",
       "    shape-rendering: geometricPrecision;\n",
       "    stroke-width: 1;\n",
       "}\n",
       "\n",
       "svg.learning-curve .grid line {\n",
       "    stroke: #fff;\n",
       "    stroke-width: 2;\n",
       "}\n",
       "\n",
       "svg.learning-curve .grid .minor {\n",
       "    stroke-opacity: .5;\n",
       "}\n",
       "\n",
       "svg.learning-curve .grid text {\n",
       "    display: none;\n",
       "}\n",
       "\n",
       "svg.learning-curve .axis path,\n",
       "svg.learning-curve .grid path {\n",
       "    display: none;\n",
       "}\n",
       "\n",
       "svg.learning-curve .axis.hide-axis {\n",
       "    display: none;\n",
       "}\n",
       "\n",
       "svg.learning-curve .legned rect {\n",
       "    fill: #EBEBEB;\n",
       "}\n",
       "\n",
       "svg.learning-curve .legned line {\n",
       "    stroke-width: 2;\n",
       "}\n",
       "</style><script>(function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c=\"function\"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error(\"Cannot find module '\"+i+\"'\");throw a.code=\"MODULE_NOT_FOUND\",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u=\"function\"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){\n",
       "window.d3 = Object.assign(\n",
       "    {},\n",
       "    // d3.select\n",
       "    // d3.selectAll\n",
       "    require('d3-selection'),\n",
       "    // .transition()\n",
       "    require('d3-transition'),\n",
       "    // d3.extent\n",
       "    require('d3-array'),\n",
       "    // d3.axisBottom\n",
       "    // d3.axisLeft\n",
       "    require('d3-axis'),\n",
       "    // d3.scaleLinear\n",
       "    // d3.scaleTime\n",
       "    require('d3-scale'),\n",
       "    // d3.line\n",
       "    require('d3-shape')\n",
       ");\n",
       "\n",
       "},{\"d3-array\":2,\"d3-axis\":3,\"d3-scale\":10,\"d3-selection\":11,\"d3-shape\":12,\"d3-transition\":16}],2:[function(require,module,exports){\n",
       "// https://d3js.org/d3-array/ v2.4.0 Copyright 2019 Mike Bostock\n",
       "(function (global, factory) {\n",
       "typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :\n",
       "typeof define === 'function' && define.amd ? define(['exports'], factory) :\n",
       "(global = global || self, factory(global.d3 = global.d3 || {}));\n",
       "}(this, function (exports) { 'use strict';\n",
       "\n",
       "function ascending(a, b) {\n",
       "  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;\n",
       "}\n",
       "\n",
       "function bisector(compare) {\n",
       "  if (compare.length === 1) compare = ascendingComparator(compare);\n",
       "  return {\n",
       "    left: function(a, x, lo, hi) {\n",
       "      if (lo == null) lo = 0;\n",
       "      if (hi == null) hi = a.length;\n",
       "      while (lo < hi) {\n",
       "        var mid = lo + hi >>> 1;\n",
       "        if (compare(a[mid], x) < 0) lo = mid + 1;\n",
       "        else hi = mid;\n",
       "      }\n",
       "      return lo;\n",
       "    },\n",
       "    right: function(a, x, lo, hi) {\n",
       "      if (lo == null) lo = 0;\n",
       "      if (hi == null) hi = a.length;\n",
       "      while (lo < hi) {\n",
       "        var mid = lo + hi >>> 1;\n",
       "        if (compare(a[mid], x) > 0) hi = mid;\n",
       "        else lo = mid + 1;\n",
       "      }\n",
       "      return lo;\n",
       "    }\n",
       "  };\n",
       "}\n",
       "\n",
       "function ascendingComparator(f) {\n",
       "  return function(d, x) {\n",
       "    return ascending(f(d), x);\n",
       "  };\n",
       "}\n",
       "\n",
       "var ascendingBisect = bisector(ascending);\n",
       "var bisectRight = ascendingBisect.right;\n",
       "var bisectLeft = ascendingBisect.left;\n",
       "\n",
       "function count(values, valueof) {\n",
       "  let count = 0;\n",
       "  if (valueof === undefined) {\n",
       "    for (let value of values) {\n",
       "      if (value != null && (value = +value) >= value) {\n",
       "        ++count;\n",
       "      }\n",
       "    }\n",
       "  } else {\n",
       "    let index = -1;\n",
       "    for (let value of values) {\n",
       "      if ((value = valueof(value, ++index, values)) != null && (value = +value) >= value) {\n",
       "        ++count;\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "  return count;\n",
       "}\n",
       "\n",
       "function length(array) {\n",
       "  return array.length | 0;\n",
       "}\n",
       "\n",
       "function empty(length) {\n",
       "  return !(length > 0);\n",
       "}\n",
       "\n",
       "function arrayify(values) {\n",
       "  return typeof values !== \"object\" || \"length\" in values ? values : Array.from(values);\n",
       "}\n",
       "\n",
       "function reducer(reduce) {\n",
       "  return values => reduce(...values);\n",
       "}\n",
       "\n",
       "function cross(...values) {\n",
       "  const reduce = typeof values[values.length - 1] === \"function\" && reducer(values.pop());\n",
       "  values = values.map(arrayify);\n",
       "  const lengths = values.map(length);\n",
       "  const j = values.length - 1;\n",
       "  const index = new Array(j + 1).fill(0);\n",
       "  const product = [];\n",
       "  if (j < 0 || lengths.some(empty)) return product;\n",
       "  while (true) {\n",
       "    product.push(index.map((j, i) => values[i][j]));\n",
       "    let i = j;\n",
       "    while (++index[i] === lengths[i]) {\n",
       "      if (i === 0) return reduce ? product.map(reduce) : product;\n",
       "      index[i--] = 0;\n",
       "    }\n",
       "  }\n",
       "}\n",
       "\n",
       "function cumsum(values, valueof) {\n",
       "  var sum = 0, index = 0;\n",
       "  return Float64Array.from(values, valueof === undefined\n",
       "    ? v => (sum += +v || 0)\n",
       "    : v => (sum += +valueof(v, index++, values) || 0));\n",
       "}\n",
       "\n",
       "function descending(a, b) {\n",
       "  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;\n",
       "}\n",
       "\n",
       "function variance(values, valueof) {\n",
       "  let count = 0;\n",
       "  let delta;\n",
       "  let mean = 0;\n",
       "  let sum = 0;\n",
       "  if (valueof === undefined) {\n",
       "    for (let value of values) {\n",
       "      if (value != null && (value = +value) >= value) {\n",
       "        delta = value - mean;\n",
       "        mean += delta / ++count;\n",
       "        sum += delta * (value - mean);\n",
       "      }\n",
       "    }\n",
       "  } else {\n",
       "    let index = -1;\n",
       "    for (let value of values) {\n",
       "      if ((value = valueof(value, ++index, values)) != null && (value = +value) >= value) {\n",
       "        delta = value - mean;\n",
       "        mean += delta / ++count;\n",
       "        sum += delta * (value - mean);\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "  if (count > 1) return sum / (count - 1);\n",
       "}\n",
       "\n",
       "function deviation(values, valueof) {\n",
       "  const v = variance(values, valueof);\n",
       "  return v ? Math.sqrt(v) : v;\n",
       "}\n",
       "\n",
       "function extent(values, valueof) {\n",
       "  let min;\n",
       "  let max;\n",
       "  if (valueof === undefined) {\n",
       "    for (const value of values) {\n",
       "      if (value != null) {\n",
       "        if (min === undefined) {\n",
       "          if (value >= value) min = max = value;\n",
       "        } else {\n",
       "          if (min > value) min = value;\n",
       "          if (max < value) max = value;\n",
       "        }\n",
       "      }\n",
       "    }\n",
       "  } else {\n",
       "    let index = -1;\n",
       "    for (let value of values) {\n",
       "      if ((value = valueof(value, ++index, values)) != null) {\n",
       "        if (min === undefined) {\n",
       "          if (value >= value) min = max = value;\n",
       "        } else {\n",
       "          if (min > value) min = value;\n",
       "          if (max < value) max = value;\n",
       "        }\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "  return [min, max];\n",
       "}\n",
       "\n",
       "function identity(x) {\n",
       "  return x;\n",
       "}\n",
       "\n",
       "function group(values, ...keys) {\n",
       "  return nest(values, identity, identity, keys);\n",
       "}\n",
       "\n",
       "function groups(values, ...keys) {\n",
       "  return nest(values, Array.from, identity, keys);\n",
       "}\n",
       "\n",
       "function rollup(values, reduce, ...keys) {\n",
       "  return nest(values, identity, reduce, keys);\n",
       "}\n",
       "\n",
       "function rollups(values, reduce, ...keys) {\n",
       "  return nest(values, Array.from, reduce, keys);\n",
       "}\n",
       "\n",
       "function nest(values, map, reduce, keys) {\n",
       "  return (function regroup(values, i) {\n",
       "    if (i >= keys.length) return reduce(values);\n",
       "    const groups = new Map();\n",
       "    const keyof = keys[i++];\n",
       "    let index = -1;\n",
       "    for (const value of values) {\n",
       "      const key = keyof(value, ++index, values);\n",
       "      const group = groups.get(key);\n",
       "      if (group) group.push(value);\n",
       "      else groups.set(key, [value]);\n",
       "    }\n",
       "    for (const [key, values] of groups) {\n",
       "      groups.set(key, regroup(values, i));\n",
       "    }\n",
       "    return map(groups);\n",
       "  })(values, 0);\n",
       "}\n",
       "\n",
       "var array = Array.prototype;\n",
       "\n",
       "var slice = array.slice;\n",
       "\n",
       "function constant(x) {\n",
       "  return function() {\n",
       "    return x;\n",
       "  };\n",
       "}\n",
       "\n",
       "function range(start, stop, step) {\n",
       "  start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;\n",
       "\n",
       "  var i = -1,\n",
       "      n = Math.max(0, Math.ceil((stop - start) / step)) | 0,\n",
       "      range = new Array(n);\n",
       "\n",
       "  while (++i < n) {\n",
       "    range[i] = start + i * step;\n",
       "  }\n",
       "\n",
       "  return range;\n",
       "}\n",
       "\n",
       "var e10 = Math.sqrt(50),\n",
       "    e5 = Math.sqrt(10),\n",
       "    e2 = Math.sqrt(2);\n",
       "\n",
       "function ticks(start, stop, count) {\n",
       "  var reverse,\n",
       "      i = -1,\n",
       "      n,\n",
       "      ticks,\n",
       "      step;\n",
       "\n",
       "  stop = +stop, start = +start, count = +count;\n",
       "  if (start === stop && count > 0) return [start];\n",
       "  if (reverse = stop < start) n = start, start = stop, stop = n;\n",
       "  if ((step = tickIncrement(start, stop, count)) === 0 || !isFinite(step)) return [];\n",
       "\n",
       "  if (step > 0) {\n",
       "    start = Math.ceil(start / step);\n",
       "    stop = Math.floor(stop / step);\n",
       "    ticks = new Array(n = Math.ceil(stop - start + 1));\n",
       "    while (++i < n) ticks[i] = (start + i) * step;\n",
       "  } else {\n",
       "    start = Math.floor(start * step);\n",
       "    stop = Math.ceil(stop * step);\n",
       "    ticks = new Array(n = Math.ceil(start - stop + 1));\n",
       "    while (++i < n) ticks[i] = (start - i) / step;\n",
       "  }\n",
       "\n",
       "  if (reverse) ticks.reverse();\n",
       "\n",
       "  return ticks;\n",
       "}\n",
       "\n",
       "function tickIncrement(start, stop, count) {\n",
       "  var step = (stop - start) / Math.max(0, count),\n",
       "      power = Math.floor(Math.log(step) / Math.LN10),\n",
       "      error = step / Math.pow(10, power);\n",
       "  return power >= 0\n",
       "      ? (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1) * Math.pow(10, power)\n",
       "      : -Math.pow(10, -power) / (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1);\n",
       "}\n",
       "\n",
       "function tickStep(start, stop, count) {\n",
       "  var step0 = Math.abs(stop - start) / Math.max(0, count),\n",
       "      step1 = Math.pow(10, Math.floor(Math.log(step0) / Math.LN10)),\n",
       "      error = step0 / step1;\n",
       "  if (error >= e10) step1 *= 10;\n",
       "  else if (error >= e5) step1 *= 5;\n",
       "  else if (error >= e2) step1 *= 2;\n",
       "  return stop < start ? -step1 : step1;\n",
       "}\n",
       "\n",
       "function sturges(values) {\n",
       "  return Math.ceil(Math.log(count(values)) / Math.LN2) + 1;\n",
       "}\n",
       "\n",
       "function bin() {\n",
       "  var value = identity,\n",
       "      domain = extent,\n",
       "      threshold = sturges;\n",
       "\n",
       "  function histogram(data) {\n",
       "    if (!Array.isArray(data)) data = Array.from(data);\n",
       "\n",
       "    var i,\n",
       "        n = data.length,\n",
       "        x,\n",
       "        values = new Array(n);\n",
       "\n",
       "    for (i = 0; i < n; ++i) {\n",
       "      values[i] = value(data[i], i, data);\n",
       "    }\n",
       "\n",
       "    var xz = domain(values),\n",
       "        x0 = xz[0],\n",
       "        x1 = xz[1],\n",
       "        tz = threshold(values, x0, x1);\n",
       "\n",
       "    // Convert number of thresholds into uniform thresholds.\n",
       "    if (!Array.isArray(tz)) {\n",
       "      tz = tickStep(x0, x1, tz);\n",
       "      tz = range(Math.ceil(x0 / tz) * tz, x1, tz); // exclusive\n",
       "    }\n",
       "\n",
       "    // Remove any thresholds outside the domain.\n",
       "    var m = tz.length;\n",
       "    while (tz[0] <= x0) tz.shift(), --m;\n",
       "    while (tz[m - 1] > x1) tz.pop(), --m;\n",
       "\n",
       "    var bins = new Array(m + 1),\n",
       "        bin;\n",
       "\n",
       "    // Initialize bins.\n",
       "    for (i = 0; i <= m; ++i) {\n",
       "      bin = bins[i] = [];\n",
       "      bin.x0 = i > 0 ? tz[i - 1] : x0;\n",
       "      bin.x1 = i < m ? tz[i] : x1;\n",
       "    }\n",
       "\n",
       "    // Assign data to bins by value, ignoring any outside the domain.\n",
       "    for (i = 0; i < n; ++i) {\n",
       "      x = values[i];\n",
       "      if (x0 <= x && x <= x1) {\n",
       "        bins[bisectRight(tz, x, 0, m)].push(data[i]);\n",
       "      }\n",
       "    }\n",
       "\n",
       "    return bins;\n",
       "  }\n",
       "\n",
       "  histogram.value = function(_) {\n",
       "    return arguments.length ? (value = typeof _ === \"function\" ? _ : constant(_), histogram) : value;\n",
       "  };\n",
       "\n",
       "  histogram.domain = function(_) {\n",
       "    return arguments.length ? (domain = typeof _ === \"function\" ? _ : constant([_[0], _[1]]), histogram) : domain;\n",
       "  };\n",
       "\n",
       "  histogram.thresholds = function(_) {\n",
       "    return arguments.length ? (threshold = typeof _ === \"function\" ? _ : Array.isArray(_) ? constant(slice.call(_)) : constant(_), histogram) : threshold;\n",
       "  };\n",
       "\n",
       "  return histogram;\n",
       "}\n",
       "\n",
       "function max(values, valueof) {\n",
       "  let max;\n",
       "  if (valueof === undefined) {\n",
       "    for (const value of values) {\n",
       "      if (value != null\n",
       "          && (max < value || (max === undefined && value >= value))) {\n",
       "        max = value;\n",
       "      }\n",
       "    }\n",
       "  } else {\n",
       "    let index = -1;\n",
       "    for (let value of values) {\n",
       "      if ((value = valueof(value, ++index, values)) != null\n",
       "          && (max < value || (max === undefined && value >= value))) {\n",
       "        max = value;\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "  return max;\n",
       "}\n",
       "\n",
       "function min(values, valueof) {\n",
       "  let min;\n",
       "  if (valueof === undefined) {\n",
       "    for (const value of values) {\n",
       "      if (value != null\n",
       "          && (min > value || (min === undefined && value >= value))) {\n",
       "        min = value;\n",
       "      }\n",
       "    }\n",
       "  } else {\n",
       "    let index = -1;\n",
       "    for (let value of values) {\n",
       "      if ((value = valueof(value, ++index, values)) != null\n",
       "          && (min > value || (min === undefined && value >= value))) {\n",
       "        min = value;\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "  return min;\n",
       "}\n",
       "\n",
       "// Based on https://github.com/mourner/quickselect\n",
       "// ISC license, Copyright 2018 Vladimir Agafonkin.\n",
       "function quickselect(array, k, left = 0, right = array.length - 1, compare = ascending) {\n",
       "  while (right > left) {\n",
       "    if (right - left > 600) {\n",
       "      const n = right - left + 1;\n",
       "      const m = k - left + 1;\n",
       "      const z = Math.log(n);\n",
       "      const s = 0.5 * Math.exp(2 * z / 3);\n",
       "      const sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);\n",
       "      const newLeft = Math.max(left, Math.floor(k - m * s / n + sd));\n",
       "      const newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));\n",
       "      quickselect(array, k, newLeft, newRight, compare);\n",
       "    }\n",
       "\n",
       "    const t = array[k];\n",
       "    let i = left;\n",
       "    let j = right;\n",
       "\n",
       "    swap(array, left, k);\n",
       "    if (compare(array[right], t) > 0) swap(array, left, right);\n",
       "\n",
       "    while (i < j) {\n",
       "      swap(array, i, j), ++i, --j;\n",
       "      while (compare(array[i], t) < 0) ++i;\n",
       "      while (compare(array[j], t) > 0) --j;\n",
       "    }\n",
       "\n",
       "    if (compare(array[left], t) === 0) swap(array, left, j);\n",
       "    else ++j, swap(array, j, right);\n",
       "\n",
       "    if (j <= k) left = j + 1;\n",
       "    if (k <= j) right = j - 1;\n",
       "  }\n",
       "  return array;\n",
       "}\n",
       "\n",
       "function swap(array, i, j) {\n",
       "  const t = array[i];\n",
       "  array[i] = array[j];\n",
       "  array[j] = t;\n",
       "}\n",
       "\n",
       "function number(x) {\n",
       "  return x === null ? NaN : +x;\n",
       "}\n",
       "\n",
       "function* numbers(values, valueof) {\n",
       "  if (valueof === undefined) {\n",
       "    for (let value of values) {\n",
       "      if (value != null && (value = +value) >= value) {\n",
       "        yield value;\n",
       "      }\n",
       "    }\n",
       "  } else {\n",
       "    let index = -1;\n",
       "    for (let value of values) {\n",
       "      if ((value = valueof(value, ++index, values)) != null && (value = +value) >= value) {\n",
       "        yield value;\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "}\n",
       "\n",
       "function quantile(values, p, valueof) {\n",
       "  values = Float64Array.from(numbers(values, valueof));\n",
       "  if (!(n = values.length)) return;\n",
       "  if ((p = +p) <= 0 || n < 2) return min(values);\n",
       "  if (p >= 1) return max(values);\n",
       "  var n,\n",
       "      i = (n - 1) * p,\n",
       "      i0 = Math.floor(i),\n",
       "      value0 = max(quickselect(values, i0).subarray(0, i0 + 1)),\n",
       "      value1 = min(values.subarray(i0 + 1));\n",
       "  return value0 + (value1 - value0) * (i - i0);\n",
       "}\n",
       "\n",
       "function quantileSorted(values, p, valueof = number) {\n",
       "  if (!(n = values.length)) return;\n",
       "  if ((p = +p) <= 0 || n < 2) return +valueof(values[0], 0, values);\n",
       "  if (p >= 1) return +valueof(values[n - 1], n - 1, values);\n",
       "  var n,\n",
       "      i = (n - 1) * p,\n",
       "      i0 = Math.floor(i),\n",
       "      value0 = +valueof(values[i0], i0, values),\n",
       "      value1 = +valueof(values[i0 + 1], i0 + 1, values);\n",
       "  return value0 + (value1 - value0) * (i - i0);\n",
       "}\n",
       "\n",
       "function freedmanDiaconis(values, min, max) {\n",
       "  return Math.ceil((max - min) / (2 * (quantile(values, 0.75) - quantile(values, 0.25)) * Math.pow(count(values), -1 / 3)));\n",
       "}\n",
       "\n",
       "function scott(values, min, max) {\n",
       "  return Math.ceil((max - min) / (3.5 * deviation(values) * Math.pow(count(values), -1 / 3)));\n",
       "}\n",
       "\n",
       "function maxIndex(values, valueof) {\n",
       "  let max;\n",
       "  let maxIndex = -1;\n",
       "  let index = -1;\n",
       "  if (valueof === undefined) {\n",
       "    for (const value of values) {\n",
       "      ++index;\n",
       "      if (value != null\n",
       "          && (max < value || (max === undefined && value >= value))) {\n",
       "        max = value, maxIndex = index;\n",
       "      }\n",
       "    }\n",
       "  } else {\n",
       "    for (let value of values) {\n",
       "      if ((value = valueof(value, ++index, values)) != null\n",
       "          && (max < value || (max === undefined && value >= value))) {\n",
       "        max = value, maxIndex = index;\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "  return maxIndex;\n",
       "}\n",
       "\n",
       "function mean(values, valueof) {\n",
       "  let count = 0;\n",
       "  let sum = 0;\n",
       "  if (valueof === undefined) {\n",
       "    for (let value of values) {\n",
       "      if (value != null && (value = +value) >= value) {\n",
       "        ++count, sum += value;\n",
       "      }\n",
       "    }\n",
       "  } else {\n",
       "    let index = -1;\n",
       "    for (let value of values) {\n",
       "      if ((value = valueof(value, ++index, values)) != null && (value = +value) >= value) {\n",
       "        ++count, sum += value;\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "  if (count) return sum / count;\n",
       "}\n",
       "\n",
       "function median(values, valueof) {\n",
       "  return quantile(values, 0.5, valueof);\n",
       "}\n",
       "\n",
       "function* flatten(arrays) {\n",
       "  for (const array of arrays) {\n",
       "    yield* array;\n",
       "  }\n",
       "}\n",
       "\n",
       "function merge(arrays) {\n",
       "  return Array.from(flatten(arrays));\n",
       "}\n",
       "\n",
       "function minIndex(values, valueof) {\n",
       "  let min;\n",
       "  let minIndex = -1;\n",
       "  let index = -1;\n",
       "  if (valueof === undefined) {\n",
       "    for (const value of values) {\n",
       "      ++index;\n",
       "      if (value != null\n",
       "          && (min > value || (min === undefined && value >= value))) {\n",
       "        min = value, minIndex = index;\n",
       "      }\n",
       "    }\n",
       "  } else {\n",
       "    for (let value of values) {\n",
       "      if ((value = valueof(value, ++index, values)) != null\n",
       "          && (min > value || (min === undefined && value >= value))) {\n",
       "        min = value, minIndex = index;\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "  return minIndex;\n",
       "}\n",
       "\n",
       "function pairs(values, pairof = pair) {\n",
       "  const pairs = [];\n",
       "  let previous;\n",
       "  let first = false;\n",
       "  for (const value of values) {\n",
       "    if (first) pairs.push(pairof(previous, value));\n",
       "    previous = value;\n",
       "    first = true;\n",
       "  }\n",
       "  return pairs;\n",
       "}\n",
       "\n",
       "function pair(a, b) {\n",
       "  return [a, b];\n",
       "}\n",
       "\n",
       "function permute(source, keys) {\n",
       "  return Array.from(keys, key => source[key]);\n",
       "}\n",
       "\n",
       "function least(values, compare = ascending) {\n",
       "  let min;\n",
       "  let defined = false;\n",
       "  if (compare.length === 1) {\n",
       "    let minValue;\n",
       "    for (const element of values) {\n",
       "      const value = compare(element);\n",
       "      if (defined\n",
       "          ? ascending(value, minValue) < 0\n",
       "          : ascending(value, value) === 0) {\n",
       "        min = element;\n",
       "        minValue = value;\n",
       "        defined = true;\n",
       "      }\n",
       "    }\n",
       "  } else {\n",
       "    for (const value of values) {\n",
       "      if (defined\n",
       "          ? compare(value, min) < 0\n",
       "          : compare(value, value) === 0) {\n",
       "        min = value;\n",
       "        defined = true;\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "  return min;\n",
       "}\n",
       "\n",
       "function leastIndex(values, compare = ascending) {\n",
       "  if (compare.length === 1) return minIndex(values, compare);\n",
       "  let minValue;\n",
       "  let min = -1;\n",
       "  let index = -1;\n",
       "  for (const value of values) {\n",
       "    ++index;\n",
       "    if (min < 0\n",
       "        ? compare(value, value) === 0\n",
       "        : compare(value, minValue) < 0) {\n",
       "      minValue = value;\n",
       "      min = index;\n",
       "    }\n",
       "  }\n",
       "  return min;\n",
       "}\n",
       "\n",
       "function greatest(values, compare = ascending) {\n",
       "  let max;\n",
       "  let defined = false;\n",
       "  if (compare.length === 1) {\n",
       "    let maxValue;\n",
       "    for (const element of values) {\n",
       "      const value = compare(element);\n",
       "      if (defined\n",
       "          ? ascending(value, maxValue) > 0\n",
       "          : ascending(value, value) === 0) {\n",
       "        max = element;\n",
       "        maxValue = value;\n",
       "        defined = true;\n",
       "      }\n",
       "    }\n",
       "  } else {\n",
       "    for (const value of values) {\n",
       "      if (defined\n",
       "          ? compare(value, max) > 0\n",
       "          : compare(value, value) === 0) {\n",
       "        max = value;\n",
       "        defined = true;\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "  return max;\n",
       "}\n",
       "\n",
       "function greatestIndex(values, compare = ascending) {\n",
       "  if (compare.length === 1) return maxIndex(values, compare);\n",
       "  let maxValue;\n",
       "  let max = -1;\n",
       "  let index = -1;\n",
       "  for (const value of values) {\n",
       "    ++index;\n",
       "    if (max < 0\n",
       "        ? compare(value, value) === 0\n",
       "        : compare(value, maxValue) > 0) {\n",
       "      maxValue = value;\n",
       "      max = index;\n",
       "    }\n",
       "  }\n",
       "  return max;\n",
       "}\n",
       "\n",
       "function scan(values, compare) {\n",
       "  const index = leastIndex(values, compare);\n",
       "  return index < 0 ? undefined : index;\n",
       "}\n",
       "\n",
       "function shuffle(array, i0 = 0, i1 = array.length) {\n",
       "  var m = i1 - (i0 = +i0),\n",
       "      t,\n",
       "      i;\n",
       "\n",
       "  while (m) {\n",
       "    i = Math.random() * m-- | 0;\n",
       "    t = array[m + i0];\n",
       "    array[m + i0] = array[i + i0];\n",
       "    array[i + i0] = t;\n",
       "  }\n",
       "\n",
       "  return array;\n",
       "}\n",
       "\n",
       "function sum(values, valueof) {\n",
       "  let sum = 0;\n",
       "  if (valueof === undefined) {\n",
       "    for (let value of values) {\n",
       "      if (value = +value) {\n",
       "        sum += value;\n",
       "      }\n",
       "    }\n",
       "  } else {\n",
       "    let index = -1;\n",
       "    for (let value of values) {\n",
       "      if (value = +valueof(value, ++index, values)) {\n",
       "        sum += value;\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "  return sum;\n",
       "}\n",
       "\n",
       "function transpose(matrix) {\n",
       "  if (!(n = matrix.length)) return [];\n",
       "  for (var i = -1, m = min(matrix, length$1), transpose = new Array(m); ++i < m;) {\n",
       "    for (var j = -1, n, row = transpose[i] = new Array(n); ++j < n;) {\n",
       "      row[j] = matrix[j][i];\n",
       "    }\n",
       "  }\n",
       "  return transpose;\n",
       "}\n",
       "\n",
       "function length$1(d) {\n",
       "  return d.length;\n",
       "}\n",
       "\n",
       "function zip() {\n",
       "  return transpose(arguments);\n",
       "}\n",
       "\n",
       "exports.ascending = ascending;\n",
       "exports.bin = bin;\n",
       "exports.bisect = bisectRight;\n",
       "exports.bisectLeft = bisectLeft;\n",
       "exports.bisectRight = bisectRight;\n",
       "exports.bisector = bisector;\n",
       "exports.count = count;\n",
       "exports.cross = cross;\n",
       "exports.cumsum = cumsum;\n",
       "exports.descending = descending;\n",
       "exports.deviation = deviation;\n",
       "exports.extent = extent;\n",
       "exports.greatest = greatest;\n",
       "exports.greatestIndex = greatestIndex;\n",
       "exports.group = group;\n",
       "exports.groups = groups;\n",
       "exports.histogram = bin;\n",
       "exports.least = least;\n",
       "exports.leastIndex = leastIndex;\n",
       "exports.max = max;\n",
       "exports.maxIndex = maxIndex;\n",
       "exports.mean = mean;\n",
       "exports.median = median;\n",
       "exports.merge = merge;\n",
       "exports.min = min;\n",
       "exports.minIndex = minIndex;\n",
       "exports.pairs = pairs;\n",
       "exports.permute = permute;\n",
       "exports.quantile = quantile;\n",
       "exports.quantileSorted = quantileSorted;\n",
       "exports.quickselect = quickselect;\n",
       "exports.range = range;\n",
       "exports.rollup = rollup;\n",
       "exports.rollups = rollups;\n",
       "exports.scan = scan;\n",
       "exports.shuffle = shuffle;\n",
       "exports.sum = sum;\n",
       "exports.thresholdFreedmanDiaconis = freedmanDiaconis;\n",
       "exports.thresholdScott = scott;\n",
       "exports.thresholdSturges = sturges;\n",
       "exports.tickIncrement = tickIncrement;\n",
       "exports.tickStep = tickStep;\n",
       "exports.ticks = ticks;\n",
       "exports.transpose = transpose;\n",
       "exports.variance = variance;\n",
       "exports.zip = zip;\n",
       "\n",
       "Object.defineProperty(exports, '__esModule', { value: true });\n",
       "\n",
       "}));\n",
       "\n",
       "},{}],3:[function(require,module,exports){\n",
       "// https://d3js.org/d3-axis/ v1.0.12 Copyright 2018 Mike Bostock\n",
       "(function (global, factory) {\n",
       "typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :\n",
       "typeof define === 'function' && define.amd ? define(['exports'], factory) :\n",
       "(factory((global.d3 = global.d3 || {})));\n",
       "}(this, (function (exports) { 'use strict';\n",
       "\n",
       "var slice = Array.prototype.slice;\n",
       "\n",
       "function identity(x) {\n",
       "  return x;\n",
       "}\n",
       "\n",
       "var top = 1,\n",
       "    right = 2,\n",
       "    bottom = 3,\n",
       "    left = 4,\n",
       "    epsilon = 1e-6;\n",
       "\n",
       "function translateX(x) {\n",
       "  return \"translate(\" + (x + 0.5) + \",0)\";\n",
       "}\n",
       "\n",
       "function translateY(y) {\n",
       "  return \"translate(0,\" + (y + 0.5) + \")\";\n",
       "}\n",
       "\n",
       "function number(scale) {\n",
       "  return function(d) {\n",
       "    return +scale(d);\n",
       "  };\n",
       "}\n",
       "\n",
       "function center(scale) {\n",
       "  var offset = Math.max(0, scale.bandwidth() - 1) / 2; // Adjust for 0.5px offset.\n",
       "  if (scale.round()) offset = Math.round(offset);\n",
       "  return function(d) {\n",
       "    return +scale(d) + offset;\n",
       "  };\n",
       "}\n",
       "\n",
       "function entering() {\n",
       "  return !this.__axis;\n",
       "}\n",
       "\n",
       "function axis(orient, scale) {\n",
       "  var tickArguments = [],\n",
       "      tickValues = null,\n",
       "      tickFormat = null,\n",
       "      tickSizeInner = 6,\n",
       "      tickSizeOuter = 6,\n",
       "      tickPadding = 3,\n",
       "      k = orient === top || orient === left ? -1 : 1,\n",
       "      x = orient === left || orient === right ? \"x\" : \"y\",\n",
       "      transform = orient === top || orient === bottom ? translateX : translateY;\n",
       "\n",
       "  function axis(context) {\n",
       "    var values = tickValues == null ? (scale.ticks ? scale.ticks.apply(scale, tickArguments) : scale.domain()) : tickValues,\n",
       "        format = tickFormat == null ? (scale.tickFormat ? scale.tickFormat.apply(scale, tickArguments) : identity) : tickFormat,\n",
       "        spacing = Math.max(tickSizeInner, 0) + tickPadding,\n",
       "        range = scale.range(),\n",
       "        range0 = +range[0] + 0.5,\n",
       "        range1 = +range[range.length - 1] + 0.5,\n",
       "        position = (scale.bandwidth ? center : number)(scale.copy()),\n",
       "        selection = context.selection ? context.selection() : context,\n",
       "        path = selection.selectAll(\".domain\").data([null]),\n",
       "        tick = selection.selectAll(\".tick\").data(values, scale).order(),\n",
       "        tickExit = tick.exit(),\n",
       "        tickEnter = tick.enter().append(\"g\").attr(\"class\", \"tick\"),\n",
       "        line = tick.select(\"line\"),\n",
       "        text = tick.select(\"text\");\n",
       "\n",
       "    path = path.merge(path.enter().insert(\"path\", \".tick\")\n",
       "        .attr(\"class\", \"domain\")\n",
       "        .attr(\"stroke\", \"currentColor\"));\n",
       "\n",
       "    tick = tick.merge(tickEnter);\n",
       "\n",
       "    line = line.merge(tickEnter.append(\"line\")\n",
       "        .attr(\"stroke\", \"currentColor\")\n",
       "        .attr(x + \"2\", k * tickSizeInner));\n",
       "\n",
       "    text = text.merge(tickEnter.append(\"text\")\n",
       "        .attr(\"fill\", \"currentColor\")\n",
       "        .attr(x, k * spacing)\n",
       "        .attr(\"dy\", orient === top ? \"0em\" : orient === bottom ? \"0.71em\" : \"0.32em\"));\n",
       "\n",
       "    if (context !== selection) {\n",
       "      path = path.transition(context);\n",
       "      tick = tick.transition(context);\n",
       "      line = line.transition(context);\n",
       "      text = text.transition(context);\n",
       "\n",
       "      tickExit = tickExit.transition(context)\n",
       "          .attr(\"opacity\", epsilon)\n",
       "          .attr(\"transform\", function(d) { return isFinite(d = position(d)) ? transform(d) : this.getAttribute(\"transform\"); });\n",
       "\n",
       "      tickEnter\n",
       "          .attr(\"opacity\", epsilon)\n",
       "          .attr(\"transform\", function(d) { var p = this.parentNode.__axis; return transform(p && isFinite(p = p(d)) ? p : position(d)); });\n",
       "    }\n",
       "\n",
       "    tickExit.remove();\n",
       "\n",
       "    path\n",
       "        .attr(\"d\", orient === left || orient == right\n",
       "            ? (tickSizeOuter ? \"M\" + k * tickSizeOuter + \",\" + range0 + \"H0.5V\" + range1 + \"H\" + k * tickSizeOuter : \"M0.5,\" + range0 + \"V\" + range1)\n",
       "            : (tickSizeOuter ? \"M\" + range0 + \",\" + k * tickSizeOuter + \"V0.5H\" + range1 + \"V\" + k * tickSizeOuter : \"M\" + range0 + \",0.5H\" + range1));\n",
       "\n",
       "    tick\n",
       "        .attr(\"opacity\", 1)\n",
       "        .attr(\"transform\", function(d) { return transform(position(d)); });\n",
       "\n",
       "    line\n",
       "        .attr(x + \"2\", k * tickSizeInner);\n",
       "\n",
       "    text\n",
       "        .attr(x, k * spacing)\n",
       "        .text(format);\n",
       "\n",
       "    selection.filter(entering)\n",
       "        .attr(\"fill\", \"none\")\n",
       "        .attr(\"font-size\", 10)\n",
       "        .attr(\"font-family\", \"sans-serif\")\n",
       "        .attr(\"text-anchor\", orient === right ? \"start\" : orient === left ? \"end\" : \"middle\");\n",
       "\n",
       "    selection\n",
       "        .each(function() { this.__axis = position; });\n",
       "  }\n",
       "\n",
       "  axis.scale = function(_) {\n",
       "    return arguments.length ? (scale = _, axis) : scale;\n",
       "  };\n",
       "\n",
       "  axis.ticks = function() {\n",
       "    return tickArguments = slice.call(arguments), axis;\n",
       "  };\n",
       "\n",
       "  axis.tickArguments = function(_) {\n",
       "    return arguments.length ? (tickArguments = _ == null ? [] : slice.call(_), axis) : tickArguments.slice();\n",
       "  };\n",
       "\n",
       "  axis.tickValues = function(_) {\n",
       "    return arguments.length ? (tickValues = _ == null ? null : slice.call(_), axis) : tickValues && tickValues.slice();\n",
       "  };\n",
       "\n",
       "  axis.tickFormat = function(_) {\n",
       "    return arguments.length ? (tickFormat = _, axis) : tickFormat;\n",
       "  };\n",
       "\n",
       "  axis.tickSize = function(_) {\n",
       "    return arguments.length ? (tickSizeInner = tickSizeOuter = +_, axis) : tickSizeInner;\n",
       "  };\n",
       "\n",
       "  axis.tickSizeInner = function(_) {\n",
       "    return arguments.length ? (tickSizeInner = +_, axis) : tickSizeInner;\n",
       "  };\n",
       "\n",
       "  axis.tickSizeOuter = function(_) {\n",
       "    return arguments.length ? (tickSizeOuter = +_, axis) : tickSizeOuter;\n",
       "  };\n",
       "\n",
       "  axis.tickPadding = function(_) {\n",
       "    return arguments.length ? (tickPadding = +_, axis) : tickPadding;\n",
       "  };\n",
       "\n",
       "  return axis;\n",
       "}\n",
       "\n",
       "function axisTop(scale) {\n",
       "  return axis(top, scale);\n",
       "}\n",
       "\n",
       "function axisRight(scale) {\n",
       "  return axis(right, scale);\n",
       "}\n",
       "\n",
       "function axisBottom(scale) {\n",
       "  return axis(bottom, scale);\n",
       "}\n",
       "\n",
       "function axisLeft(scale) {\n",
       "  return axis(left, scale);\n",
       "}\n",
       "\n",
       "exports.axisTop = axisTop;\n",
       "exports.axisRight = axisRight;\n",
       "exports.axisBottom = axisBottom;\n",
       "exports.axisLeft = axisLeft;\n",
       "\n",
       "Object.defineProperty(exports, '__esModule', { value: true });\n",
       "\n",
       "})));\n",
       "\n",
       "},{}],4:[function(require,module,exports){\n",
       "// https://d3js.org/d3-color/ v1.4.0 Copyright 2019 Mike Bostock\n",
       "(function (global, factory) {\n",
       "typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :\n",
       "typeof define === 'function' && define.amd ? define(['exports'], factory) :\n",
       "(global = global || self, factory(global.d3 = global.d3 || {}));\n",
       "}(this, function (exports) { 'use strict';\n",
       "\n",
       "function define(constructor, factory, prototype) {\n",
       "  constructor.prototype = factory.prototype = prototype;\n",
       "  prototype.constructor = constructor;\n",
       "}\n",
       "\n",
       "function extend(parent, definition) {\n",
       "  var prototype = Object.create(parent.prototype);\n",
       "  for (var key in definition) prototype[key] = definition[key];\n",
       "  return prototype;\n",
       "}\n",
       "\n",
       "function Color() {}\n",
       "\n",
       "var darker = 0.7;\n",
       "var brighter = 1 / darker;\n",
       "\n",
       "var reI = \"\\\\s*([+-]?\\\\d+)\\\\s*\",\n",
       "    reN = \"\\\\s*([+-]?\\\\d*\\\\.?\\\\d+(?:[eE][+-]?\\\\d+)?)\\\\s*\",\n",
       "    reP = \"\\\\s*([+-]?\\\\d*\\\\.?\\\\d+(?:[eE][+-]?\\\\d+)?)%\\\\s*\",\n",
       "    reHex = /^#([0-9a-f]{3,8})$/,\n",
       "    reRgbInteger = new RegExp(\"^rgb\\\\(\" + [reI, reI, reI] + \"\\\\)$\"),\n",
       "    reRgbPercent = new RegExp(\"^rgb\\\\(\" + [reP, reP, reP] + \"\\\\)$\"),\n",
       "    reRgbaInteger = new RegExp(\"^rgba\\\\(\" + [reI, reI, reI, reN] + \"\\\\)$\"),\n",
       "    reRgbaPercent = new RegExp(\"^rgba\\\\(\" + [reP, reP, reP, reN] + \"\\\\)$\"),\n",
       "    reHslPercent = new RegExp(\"^hsl\\\\(\" + [reN, reP, reP] + \"\\\\)$\"),\n",
       "    reHslaPercent = new RegExp(\"^hsla\\\\(\" + [reN, reP, reP, reN] + \"\\\\)$\");\n",
       "\n",
       "var named = {\n",
       "  aliceblue: 0xf0f8ff,\n",
       "  antiquewhite: 0xfaebd7,\n",
       "  aqua: 0x00ffff,\n",
       "  aquamarine: 0x7fffd4,\n",
       "  azure: 0xf0ffff,\n",
       "  beige: 0xf5f5dc,\n",
       "  bisque: 0xffe4c4,\n",
       "  black: 0x000000,\n",
       "  blanchedalmond: 0xffebcd,\n",
       "  blue: 0x0000ff,\n",
       "  blueviolet: 0x8a2be2,\n",
       "  brown: 0xa52a2a,\n",
       "  burlywood: 0xdeb887,\n",
       "  cadetblue: 0x5f9ea0,\n",
       "  chartreuse: 0x7fff00,\n",
       "  chocolate: 0xd2691e,\n",
       "  coral: 0xff7f50,\n",
       "  cornflowerblue: 0x6495ed,\n",
       "  cornsilk: 0xfff8dc,\n",
       "  crimson: 0xdc143c,\n",
       "  cyan: 0x00ffff,\n",
       "  darkblue: 0x00008b,\n",
       "  darkcyan: 0x008b8b,\n",
       "  darkgoldenrod: 0xb8860b,\n",
       "  darkgray: 0xa9a9a9,\n",
       "  darkgreen: 0x006400,\n",
       "  darkgrey: 0xa9a9a9,\n",
       "  darkkhaki: 0xbdb76b,\n",
       "  darkmagenta: 0x8b008b,\n",
       "  darkolivegreen: 0x556b2f,\n",
       "  darkorange: 0xff8c00,\n",
       "  darkorchid: 0x9932cc,\n",
       "  darkred: 0x8b0000,\n",
       "  darksalmon: 0xe9967a,\n",
       "  darkseagreen: 0x8fbc8f,\n",
       "  darkslateblue: 0x483d8b,\n",
       "  darkslategray: 0x2f4f4f,\n",
       "  darkslategrey: 0x2f4f4f,\n",
       "  darkturquoise: 0x00ced1,\n",
       "  darkviolet: 0x9400d3,\n",
       "  deeppink: 0xff1493,\n",
       "  deepskyblue: 0x00bfff,\n",
       "  dimgray: 0x696969,\n",
       "  dimgrey: 0x696969,\n",
       "  dodgerblue: 0x1e90ff,\n",
       "  firebrick: 0xb22222,\n",
       "  floralwhite: 0xfffaf0,\n",
       "  forestgreen: 0x228b22,\n",
       "  fuchsia: 0xff00ff,\n",
       "  gainsboro: 0xdcdcdc,\n",
       "  ghostwhite: 0xf8f8ff,\n",
       "  gold: 0xffd700,\n",
       "  goldenrod: 0xdaa520,\n",
       "  gray: 0x808080,\n",
       "  green: 0x008000,\n",
       "  greenyellow: 0xadff2f,\n",
       "  grey: 0x808080,\n",
       "  honeydew: 0xf0fff0,\n",
       "  hotpink: 0xff69b4,\n",
       "  indianred: 0xcd5c5c,\n",
       "  indigo: 0x4b0082,\n",
       "  ivory: 0xfffff0,\n",
       "  khaki: 0xf0e68c,\n",
       "  lavender: 0xe6e6fa,\n",
       "  lavenderblush: 0xfff0f5,\n",
       "  lawngreen: 0x7cfc00,\n",
       "  lemonchiffon: 0xfffacd,\n",
       "  lightblue: 0xadd8e6,\n",
       "  lightcoral: 0xf08080,\n",
       "  lightcyan: 0xe0ffff,\n",
       "  lightgoldenrodyellow: 0xfafad2,\n",
       "  lightgray: 0xd3d3d3,\n",
       "  lightgreen: 0x90ee90,\n",
       "  lightgrey: 0xd3d3d3,\n",
       "  lightpink: 0xffb6c1,\n",
       "  lightsalmon: 0xffa07a,\n",
       "  lightseagreen: 0x20b2aa,\n",
       "  lightskyblue: 0x87cefa,\n",
       "  lightslategray: 0x778899,\n",
       "  lightslategrey: 0x778899,\n",
       "  lightsteelblue: 0xb0c4de,\n",
       "  lightyellow: 0xffffe0,\n",
       "  lime: 0x00ff00,\n",
       "  limegreen: 0x32cd32,\n",
       "  linen: 0xfaf0e6,\n",
       "  magenta: 0xff00ff,\n",
       "  maroon: 0x800000,\n",
       "  mediumaquamarine: 0x66cdaa,\n",
       "  mediumblue: 0x0000cd,\n",
       "  mediumorchid: 0xba55d3,\n",
       "  mediumpurple: 0x9370db,\n",
       "  mediumseagreen: 0x3cb371,\n",
       "  mediumslateblue: 0x7b68ee,\n",
       "  mediumspringgreen: 0x00fa9a,\n",
       "  mediumturquoise: 0x48d1cc,\n",
       "  mediumvioletred: 0xc71585,\n",
       "  midnightblue: 0x191970,\n",
       "  mintcream: 0xf5fffa,\n",
       "  mistyrose: 0xffe4e1,\n",
       "  moccasin: 0xffe4b5,\n",
       "  navajowhite: 0xffdead,\n",
       "  navy: 0x000080,\n",
       "  oldlace: 0xfdf5e6,\n",
       "  olive: 0x808000,\n",
       "  olivedrab: 0x6b8e23,\n",
       "  orange: 0xffa500,\n",
       "  orangered: 0xff4500,\n",
       "  orchid: 0xda70d6,\n",
       "  palegoldenrod: 0xeee8aa,\n",
       "  palegreen: 0x98fb98,\n",
       "  paleturquoise: 0xafeeee,\n",
       "  palevioletred: 0xdb7093,\n",
       "  papayawhip: 0xffefd5,\n",
       "  peachpuff: 0xffdab9,\n",
       "  peru: 0xcd853f,\n",
       "  pink: 0xffc0cb,\n",
       "  plum: 0xdda0dd,\n",
       "  powderblue: 0xb0e0e6,\n",
       "  purple: 0x800080,\n",
       "  rebeccapurple: 0x663399,\n",
       "  red: 0xff0000,\n",
       "  rosybrown: 0xbc8f8f,\n",
       "  royalblue: 0x4169e1,\n",
       "  saddlebrown: 0x8b4513,\n",
       "  salmon: 0xfa8072,\n",
       "  sandybrown: 0xf4a460,\n",
       "  seagreen: 0x2e8b57,\n",
       "  seashell: 0xfff5ee,\n",
       "  sienna: 0xa0522d,\n",
       "  silver: 0xc0c0c0,\n",
       "  skyblue: 0x87ceeb,\n",
       "  slateblue: 0x6a5acd,\n",
       "  slategray: 0x708090,\n",
       "  slategrey: 0x708090,\n",
       "  snow: 0xfffafa,\n",
       "  springgreen: 0x00ff7f,\n",
       "  steelblue: 0x4682b4,\n",
       "  tan: 0xd2b48c,\n",
       "  teal: 0x008080,\n",
       "  thistle: 0xd8bfd8,\n",
       "  tomato: 0xff6347,\n",
       "  turquoise: 0x40e0d0,\n",
       "  violet: 0xee82ee,\n",
       "  wheat: 0xf5deb3,\n",
       "  white: 0xffffff,\n",
       "  whitesmoke: 0xf5f5f5,\n",
       "  yellow: 0xffff00,\n",
       "  yellowgreen: 0x9acd32\n",
       "};\n",
       "\n",
       "define(Color, color, {\n",
       "  copy: function(channels) {\n",
       "    return Object.assign(new this.constructor, this, channels);\n",
       "  },\n",
       "  displayable: function() {\n",
       "    return this.rgb().displayable();\n",
       "  },\n",
       "  hex: color_formatHex, // Deprecated! Use color.formatHex.\n",
       "  formatHex: color_formatHex,\n",
       "  formatHsl: color_formatHsl,\n",
       "  formatRgb: color_formatRgb,\n",
       "  toString: color_formatRgb\n",
       "});\n",
       "\n",
       "function color_formatHex() {\n",
       "  return this.rgb().formatHex();\n",
       "}\n",
       "\n",
       "function color_formatHsl() {\n",
       "  return hslConvert(this).formatHsl();\n",
       "}\n",
       "\n",
       "function color_formatRgb() {\n",
       "  return this.rgb().formatRgb();\n",
       "}\n",
       "\n",
       "function color(format) {\n",
       "  var m, l;\n",
       "  format = (format + \"\").trim().toLowerCase();\n",
       "  return (m = reHex.exec(format)) ? (l = m[1].length, m = parseInt(m[1], 16), l === 6 ? rgbn(m) // #ff0000\n",
       "      : l === 3 ? new Rgb((m >> 8 & 0xf) | (m >> 4 & 0xf0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1) // #f00\n",
       "      : l === 8 ? new Rgb(m >> 24 & 0xff, m >> 16 & 0xff, m >> 8 & 0xff, (m & 0xff) / 0xff) // #ff000000\n",
       "      : l === 4 ? new Rgb((m >> 12 & 0xf) | (m >> 8 & 0xf0), (m >> 8 & 0xf) | (m >> 4 & 0xf0), (m >> 4 & 0xf) | (m & 0xf0), (((m & 0xf) << 4) | (m & 0xf)) / 0xff) // #f000\n",
       "      : null) // invalid hex\n",
       "      : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)\n",
       "      : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)\n",
       "      : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)\n",
       "      : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)\n",
       "      : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)\n",
       "      : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)\n",
       "      : named.hasOwnProperty(format) ? rgbn(named[format]) // eslint-disable-line no-prototype-builtins\n",
       "      : format === \"transparent\" ? new Rgb(NaN, NaN, NaN, 0)\n",
       "      : null;\n",
       "}\n",
       "\n",
       "function rgbn(n) {\n",
       "  return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);\n",
       "}\n",
       "\n",
       "function rgba(r, g, b, a) {\n",
       "  if (a <= 0) r = g = b = NaN;\n",
       "  return new Rgb(r, g, b, a);\n",
       "}\n",
       "\n",
       "function rgbConvert(o) {\n",
       "  if (!(o instanceof Color)) o = color(o);\n",
       "  if (!o) return new Rgb;\n",
       "  o = o.rgb();\n",
       "  return new Rgb(o.r, o.g, o.b, o.opacity);\n",
       "}\n",
       "\n",
       "function rgb(r, g, b, opacity) {\n",
       "  return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);\n",
       "}\n",
       "\n",
       "function Rgb(r, g, b, opacity) {\n",
       "  this.r = +r;\n",
       "  this.g = +g;\n",
       "  this.b = +b;\n",
       "  this.opacity = +opacity;\n",
       "}\n",
       "\n",
       "define(Rgb, rgb, extend(Color, {\n",
       "  brighter: function(k) {\n",
       "    k = k == null ? brighter : Math.pow(brighter, k);\n",
       "    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);\n",
       "  },\n",
       "  darker: function(k) {\n",
       "    k = k == null ? darker : Math.pow(darker, k);\n",
       "    return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);\n",
       "  },\n",
       "  rgb: function() {\n",
       "    return this;\n",
       "  },\n",
       "  displayable: function() {\n",
       "    return (-0.5 <= this.r && this.r < 255.5)\n",
       "        && (-0.5 <= this.g && this.g < 255.5)\n",
       "        && (-0.5 <= this.b && this.b < 255.5)\n",
       "        && (0 <= this.opacity && this.opacity <= 1);\n",
       "  },\n",
       "  hex: rgb_formatHex, // Deprecated! Use color.formatHex.\n",
       "  formatHex: rgb_formatHex,\n",
       "  formatRgb: rgb_formatRgb,\n",
       "  toString: rgb_formatRgb\n",
       "}));\n",
       "\n",
       "function rgb_formatHex() {\n",
       "  return \"#\" + hex(this.r) + hex(this.g) + hex(this.b);\n",
       "}\n",
       "\n",
       "function rgb_formatRgb() {\n",
       "  var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));\n",
       "  return (a === 1 ? \"rgb(\" : \"rgba(\")\n",
       "      + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + \", \"\n",
       "      + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + \", \"\n",
       "      + Math.max(0, Math.min(255, Math.round(this.b) || 0))\n",
       "      + (a === 1 ? \")\" : \", \" + a + \")\");\n",
       "}\n",
       "\n",
       "function hex(value) {\n",
       "  value = Math.max(0, Math.min(255, Math.round(value) || 0));\n",
       "  return (value < 16 ? \"0\" : \"\") + value.toString(16);\n",
       "}\n",
       "\n",
       "function hsla(h, s, l, a) {\n",
       "  if (a <= 0) h = s = l = NaN;\n",
       "  else if (l <= 0 || l >= 1) h = s = NaN;\n",
       "  else if (s <= 0) h = NaN;\n",
       "  return new Hsl(h, s, l, a);\n",
       "}\n",
       "\n",
       "function hslConvert(o) {\n",
       "  if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity);\n",
       "  if (!(o instanceof Color)) o = color(o);\n",
       "  if (!o) return new Hsl;\n",
       "  if (o instanceof Hsl) return o;\n",
       "  o = o.rgb();\n",
       "  var r = o.r / 255,\n",
       "      g = o.g / 255,\n",
       "      b = o.b / 255,\n",
       "      min = Math.min(r, g, b),\n",
       "      max = Math.max(r, g, b),\n",
       "      h = NaN,\n",
       "      s = max - min,\n",
       "      l = (max + min) / 2;\n",
       "  if (s) {\n",
       "    if (r === max) h = (g - b) / s + (g < b) * 6;\n",
       "    else if (g === max) h = (b - r) / s + 2;\n",
       "    else h = (r - g) / s + 4;\n",
       "    s /= l < 0.5 ? max + min : 2 - max - min;\n",
       "    h *= 60;\n",
       "  } else {\n",
       "    s = l > 0 && l < 1 ? 0 : h;\n",
       "  }\n",
       "  return new Hsl(h, s, l, o.opacity);\n",
       "}\n",
       "\n",
       "function hsl(h, s, l, opacity) {\n",
       "  return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);\n",
       "}\n",
       "\n",
       "function Hsl(h, s, l, opacity) {\n",
       "  this.h = +h;\n",
       "  this.s = +s;\n",
       "  this.l = +l;\n",
       "  this.opacity = +opacity;\n",
       "}\n",
       "\n",
       "define(Hsl, hsl, extend(Color, {\n",
       "  brighter: function(k) {\n",
       "    k = k == null ? brighter : Math.pow(brighter, k);\n",
       "    return new Hsl(this.h, this.s, this.l * k, this.opacity);\n",
       "  },\n",
       "  darker: function(k) {\n",
       "    k = k == null ? darker : Math.pow(darker, k);\n",
       "    return new Hsl(this.h, this.s, this.l * k, this.opacity);\n",
       "  },\n",
       "  rgb: function() {\n",
       "    var h = this.h % 360 + (this.h < 0) * 360,\n",
       "        s = isNaN(h) || isNaN(this.s) ? 0 : this.s,\n",
       "        l = this.l,\n",
       "        m2 = l + (l < 0.5 ? l : 1 - l) * s,\n",
       "        m1 = 2 * l - m2;\n",
       "    return new Rgb(\n",
       "      hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2),\n",
       "      hsl2rgb(h, m1, m2),\n",
       "      hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2),\n",
       "      this.opacity\n",
       "    );\n",
       "  },\n",
       "  displayable: function() {\n",
       "    return (0 <= this.s && this.s <= 1 || isNaN(this.s))\n",
       "        && (0 <= this.l && this.l <= 1)\n",
       "        && (0 <= this.opacity && this.opacity <= 1);\n",
       "  },\n",
       "  formatHsl: function() {\n",
       "    var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));\n",
       "    return (a === 1 ? \"hsl(\" : \"hsla(\")\n",
       "        + (this.h || 0) + \", \"\n",
       "        + (this.s || 0) * 100 + \"%, \"\n",
       "        + (this.l || 0) * 100 + \"%\"\n",
       "        + (a === 1 ? \")\" : \", \" + a + \")\");\n",
       "  }\n",
       "}));\n",
       "\n",
       "/* From FvD 13.37, CSS Color Module Level 3 */\n",
       "function hsl2rgb(h, m1, m2) {\n",
       "  return (h < 60 ? m1 + (m2 - m1) * h / 60\n",
       "      : h < 180 ? m2\n",
       "      : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60\n",
       "      : m1) * 255;\n",
       "}\n",
       "\n",
       "var deg2rad = Math.PI / 180;\n",
       "var rad2deg = 180 / Math.PI;\n",
       "\n",
       "// https://observablehq.com/@mbostock/lab-and-rgb\n",
       "var K = 18,\n",
       "    Xn = 0.96422,\n",
       "    Yn = 1,\n",
       "    Zn = 0.82521,\n",
       "    t0 = 4 / 29,\n",
       "    t1 = 6 / 29,\n",
       "    t2 = 3 * t1 * t1,\n",
       "    t3 = t1 * t1 * t1;\n",
       "\n",
       "function labConvert(o) {\n",
       "  if (o instanceof Lab) return new Lab(o.l, o.a, o.b, o.opacity);\n",
       "  if (o instanceof Hcl) return hcl2lab(o);\n",
       "  if (!(o instanceof Rgb)) o = rgbConvert(o);\n",
       "  var r = rgb2lrgb(o.r),\n",
       "      g = rgb2lrgb(o.g),\n",
       "      b = rgb2lrgb(o.b),\n",
       "      y = xyz2lab((0.2225045 * r + 0.7168786 * g + 0.0606169 * b) / Yn), x, z;\n",
       "  if (r === g && g === b) x = z = y; else {\n",
       "    x = xyz2lab((0.4360747 * r + 0.3850649 * g + 0.1430804 * b) / Xn);\n",
       "    z = xyz2lab((0.0139322 * r + 0.0971045 * g + 0.7141733 * b) / Zn);\n",
       "  }\n",
       "  return new Lab(116 * y - 16, 500 * (x - y), 200 * (y - z), o.opacity);\n",
       "}\n",
       "\n",
       "function gray(l, opacity) {\n",
       "  return new Lab(l, 0, 0, opacity == null ? 1 : opacity);\n",
       "}\n",
       "\n",
       "function lab(l, a, b, opacity) {\n",
       "  return arguments.length === 1 ? labConvert(l) : new Lab(l, a, b, opacity == null ? 1 : opacity);\n",
       "}\n",
       "\n",
       "function Lab(l, a, b, opacity) {\n",
       "  this.l = +l;\n",
       "  this.a = +a;\n",
       "  this.b = +b;\n",
       "  this.opacity = +opacity;\n",
       "}\n",
       "\n",
       "define(Lab, lab, extend(Color, {\n",
       "  brighter: function(k) {\n",
       "    return new Lab(this.l + K * (k == null ? 1 : k), this.a, this.b, this.opacity);\n",
       "  },\n",
       "  darker: function(k) {\n",
       "    return new Lab(this.l - K * (k == null ? 1 : k), this.a, this.b, this.opacity);\n",
       "  },\n",
       "  rgb: function() {\n",
       "    var y = (this.l + 16) / 116,\n",
       "        x = isNaN(this.a) ? y : y + this.a / 500,\n",
       "        z = isNaN(this.b) ? y : y - this.b / 200;\n",
       "    x = Xn * lab2xyz(x);\n",
       "    y = Yn * lab2xyz(y);\n",
       "    z = Zn * lab2xyz(z);\n",
       "    return new Rgb(\n",
       "      lrgb2rgb( 3.1338561 * x - 1.6168667 * y - 0.4906146 * z),\n",
       "      lrgb2rgb(-0.9787684 * x + 1.9161415 * y + 0.0334540 * z),\n",
       "      lrgb2rgb( 0.0719453 * x - 0.2289914 * y + 1.4052427 * z),\n",
       "      this.opacity\n",
       "    );\n",
       "  }\n",
       "}));\n",
       "\n",
       "function xyz2lab(t) {\n",
       "  return t > t3 ? Math.pow(t, 1 / 3) : t / t2 + t0;\n",
       "}\n",
       "\n",
       "function lab2xyz(t) {\n",
       "  return t > t1 ? t * t * t : t2 * (t - t0);\n",
       "}\n",
       "\n",
       "function lrgb2rgb(x) {\n",
       "  return 255 * (x <= 0.0031308 ? 12.92 * x : 1.055 * Math.pow(x, 1 / 2.4) - 0.055);\n",
       "}\n",
       "\n",
       "function rgb2lrgb(x) {\n",
       "  return (x /= 255) <= 0.04045 ? x / 12.92 : Math.pow((x + 0.055) / 1.055, 2.4);\n",
       "}\n",
       "\n",
       "function hclConvert(o) {\n",
       "  if (o instanceof Hcl) return new Hcl(o.h, o.c, o.l, o.opacity);\n",
       "  if (!(o instanceof Lab)) o = labConvert(o);\n",
       "  if (o.a === 0 && o.b === 0) return new Hcl(NaN, 0 < o.l && o.l < 100 ? 0 : NaN, o.l, o.opacity);\n",
       "  var h = Math.atan2(o.b, o.a) * rad2deg;\n",
       "  return new Hcl(h < 0 ? h + 360 : h, Math.sqrt(o.a * o.a + o.b * o.b), o.l, o.opacity);\n",
       "}\n",
       "\n",
       "function lch(l, c, h, opacity) {\n",
       "  return arguments.length === 1 ? hclConvert(l) : new Hcl(h, c, l, opacity == null ? 1 : opacity);\n",
       "}\n",
       "\n",
       "function hcl(h, c, l, opacity) {\n",
       "  return arguments.length === 1 ? hclConvert(h) : new Hcl(h, c, l, opacity == null ? 1 : opacity);\n",
       "}\n",
       "\n",
       "function Hcl(h, c, l, opacity) {\n",
       "  this.h = +h;\n",
       "  this.c = +c;\n",
       "  this.l = +l;\n",
       "  this.opacity = +opacity;\n",
       "}\n",
       "\n",
       "function hcl2lab(o) {\n",
       "  if (isNaN(o.h)) return new Lab(o.l, 0, 0, o.opacity);\n",
       "  var h = o.h * deg2rad;\n",
       "  return new Lab(o.l, Math.cos(h) * o.c, Math.sin(h) * o.c, o.opacity);\n",
       "}\n",
       "\n",
       "define(Hcl, hcl, extend(Color, {\n",
       "  brighter: function(k) {\n",
       "    return new Hcl(this.h, this.c, this.l + K * (k == null ? 1 : k), this.opacity);\n",
       "  },\n",
       "  darker: function(k) {\n",
       "    return new Hcl(this.h, this.c, this.l - K * (k == null ? 1 : k), this.opacity);\n",
       "  },\n",
       "  rgb: function() {\n",
       "    return hcl2lab(this).rgb();\n",
       "  }\n",
       "}));\n",
       "\n",
       "var A = -0.14861,\n",
       "    B = +1.78277,\n",
       "    C = -0.29227,\n",
       "    D = -0.90649,\n",
       "    E = +1.97294,\n",
       "    ED = E * D,\n",
       "    EB = E * B,\n",
       "    BC_DA = B * C - D * A;\n",
       "\n",
       "function cubehelixConvert(o) {\n",
       "  if (o instanceof Cubehelix) return new Cubehelix(o.h, o.s, o.l, o.opacity);\n",
       "  if (!(o instanceof Rgb)) o = rgbConvert(o);\n",
       "  var r = o.r / 255,\n",
       "      g = o.g / 255,\n",
       "      b = o.b / 255,\n",
       "      l = (BC_DA * b + ED * r - EB * g) / (BC_DA + ED - EB),\n",
       "      bl = b - l,\n",
       "      k = (E * (g - l) - C * bl) / D,\n",
       "      s = Math.sqrt(k * k + bl * bl) / (E * l * (1 - l)), // NaN if l=0 or l=1\n",
       "      h = s ? Math.atan2(k, bl) * rad2deg - 120 : NaN;\n",
       "  return new Cubehelix(h < 0 ? h + 360 : h, s, l, o.opacity);\n",
       "}\n",
       "\n",
       "function cubehelix(h, s, l, opacity) {\n",
       "  return arguments.length === 1 ? cubehelixConvert(h) : new Cubehelix(h, s, l, opacity == null ? 1 : opacity);\n",
       "}\n",
       "\n",
       "function Cubehelix(h, s, l, opacity) {\n",
       "  this.h = +h;\n",
       "  this.s = +s;\n",
       "  this.l = +l;\n",
       "  this.opacity = +opacity;\n",
       "}\n",
       "\n",
       "define(Cubehelix, cubehelix, extend(Color, {\n",
       "  brighter: function(k) {\n",
       "    k = k == null ? brighter : Math.pow(brighter, k);\n",
       "    return new Cubehelix(this.h, this.s, this.l * k, this.opacity);\n",
       "  },\n",
       "  darker: function(k) {\n",
       "    k = k == null ? darker : Math.pow(darker, k);\n",
       "    return new Cubehelix(this.h, this.s, this.l * k, this.opacity);\n",
       "  },\n",
       "  rgb: function() {\n",
       "    var h = isNaN(this.h) ? 0 : (this.h + 120) * deg2rad,\n",
       "        l = +this.l,\n",
       "        a = isNaN(this.s) ? 0 : this.s * l * (1 - l),\n",
       "        cosh = Math.cos(h),\n",
       "        sinh = Math.sin(h);\n",
       "    return new Rgb(\n",
       "      255 * (l + a * (A * cosh + B * sinh)),\n",
       "      255 * (l + a * (C * cosh + D * sinh)),\n",
       "      255 * (l + a * (E * cosh)),\n",
       "      this.opacity\n",
       "    );\n",
       "  }\n",
       "}));\n",
       "\n",
       "exports.color = color;\n",
       "exports.cubehelix = cubehelix;\n",
       "exports.gray = gray;\n",
       "exports.hcl = hcl;\n",
       "exports.hsl = hsl;\n",
       "exports.lab = lab;\n",
       "exports.lch = lch;\n",
       "exports.rgb = rgb;\n",
       "\n",
       "Object.defineProperty(exports, '__esModule', { value: true });\n",
       "\n",
       "}));\n",
       "\n",
       "},{}],5:[function(require,module,exports){\n",
       "// https://d3js.org/d3-dispatch/ v1.0.6 Copyright 2019 Mike Bostock\n",
       "(function (global, factory) {\n",
       "typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :\n",
       "typeof define === 'function' && define.amd ? define(['exports'], factory) :\n",
       "(global = global || self, factory(global.d3 = global.d3 || {}));\n",
       "}(this, function (exports) { 'use strict';\n",
       "\n",
       "var noop = {value: function() {}};\n",
       "\n",
       "function dispatch() {\n",
       "  for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {\n",
       "    if (!(t = arguments[i] + \"\") || (t in _) || /[\\s.]/.test(t)) throw new Error(\"illegal type: \" + t);\n",
       "    _[t] = [];\n",
       "  }\n",
       "  return new Dispatch(_);\n",
       "}\n",
       "\n",
       "function Dispatch(_) {\n",
       "  this._ = _;\n",
       "}\n",
       "\n",
       "function parseTypenames(typenames, types) {\n",
       "  return typenames.trim().split(/^|\\s+/).map(function(t) {\n",
       "    var name = \"\", i = t.indexOf(\".\");\n",
       "    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);\n",
       "    if (t && !types.hasOwnProperty(t)) throw new Error(\"unknown type: \" + t);\n",
       "    return {type: t, name: name};\n",
       "  });\n",
       "}\n",
       "\n",
       "Dispatch.prototype = dispatch.prototype = {\n",
       "  constructor: Dispatch,\n",
       "  on: function(typename, callback) {\n",
       "    var _ = this._,\n",
       "        T = parseTypenames(typename + \"\", _),\n",
       "        t,\n",
       "        i = -1,\n",
       "        n = T.length;\n",
       "\n",
       "    // If no callback was specified, return the callback of the given type and name.\n",
       "    if (arguments.length < 2) {\n",
       "      while (++i < n) if ((t = (typename = T[i]).type) && (t = get(_[t], typename.name))) return t;\n",
       "      return;\n",
       "    }\n",
       "\n",
       "    // If a type was specified, set the callback for the given type and name.\n",
       "    // Otherwise, if a null callback was specified, remove callbacks of the given name.\n",
       "    if (callback != null && typeof callback !== \"function\") throw new Error(\"invalid callback: \" + callback);\n",
       "    while (++i < n) {\n",
       "      if (t = (typename = T[i]).type) _[t] = set(_[t], typename.name, callback);\n",
       "      else if (callback == null) for (t in _) _[t] = set(_[t], typename.name, null);\n",
       "    }\n",
       "\n",
       "    return this;\n",
       "  },\n",
       "  copy: function() {\n",
       "    var copy = {}, _ = this._;\n",
       "    for (var t in _) copy[t] = _[t].slice();\n",
       "    return new Dispatch(copy);\n",
       "  },\n",
       "  call: function(type, that) {\n",
       "    if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) args[i] = arguments[i + 2];\n",
       "    if (!this._.hasOwnProperty(type)) throw new Error(\"unknown type: \" + type);\n",
       "    for (t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);\n",
       "  },\n",
       "  apply: function(type, that, args) {\n",
       "    if (!this._.hasOwnProperty(type)) throw new Error(\"unknown type: \" + type);\n",
       "    for (var t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);\n",
       "  }\n",
       "};\n",
       "\n",
       "function get(type, name) {\n",
       "  for (var i = 0, n = type.length, c; i < n; ++i) {\n",
       "    if ((c = type[i]).name === name) {\n",
       "      return c.value;\n",
       "    }\n",
       "  }\n",
       "}\n",
       "\n",
       "function set(type, name, callback) {\n",
       "  for (var i = 0, n = type.length; i < n; ++i) {\n",
       "    if (type[i].name === name) {\n",
       "      type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1));\n",
       "      break;\n",
       "    }\n",
       "  }\n",
       "  if (callback != null) type.push({name: name, value: callback});\n",
       "  return type;\n",
       "}\n",
       "\n",
       "exports.dispatch = dispatch;\n",
       "\n",
       "Object.defineProperty(exports, '__esModule', { value: true });\n",
       "\n",
       "}));\n",
       "\n",
       "},{}],6:[function(require,module,exports){\n",
       "// https://d3js.org/d3-ease/ v1.0.6 Copyright 2019 Mike Bostock\n",
       "(function (global, factory) {\n",
       "typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :\n",
       "typeof define === 'function' && define.amd ? define(['exports'], factory) :\n",
       "(global = global || self, factory(global.d3 = global.d3 || {}));\n",
       "}(this, function (exports) { 'use strict';\n",
       "\n",
       "function linear(t) {\n",
       "  return +t;\n",
       "}\n",
       "\n",
       "function quadIn(t) {\n",
       "  return t * t;\n",
       "}\n",
       "\n",
       "function quadOut(t) {\n",
       "  return t * (2 - t);\n",
       "}\n",
       "\n",
       "function quadInOut(t) {\n",
       "  return ((t *= 2) <= 1 ? t * t : --t * (2 - t) + 1) / 2;\n",
       "}\n",
       "\n",
       "function cubicIn(t) {\n",
       "  return t * t * t;\n",
       "}\n",
       "\n",
       "function cubicOut(t) {\n",
       "  return --t * t * t + 1;\n",
       "}\n",
       "\n",
       "function cubicInOut(t) {\n",
       "  return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;\n",
       "}\n",
       "\n",
       "var exponent = 3;\n",
       "\n",
       "var polyIn = (function custom(e) {\n",
       "  e = +e;\n",
       "\n",
       "  function polyIn(t) {\n",
       "    return Math.pow(t, e);\n",
       "  }\n",
       "\n",
       "  polyIn.exponent = custom;\n",
       "\n",
       "  return polyIn;\n",
       "})(exponent);\n",
       "\n",
       "var polyOut = (function custom(e) {\n",
       "  e = +e;\n",
       "\n",
       "  function polyOut(t) {\n",
       "    return 1 - Math.pow(1 - t, e);\n",
       "  }\n",
       "\n",
       "  polyOut.exponent = custom;\n",
       "\n",
       "  return polyOut;\n",
       "})(exponent);\n",
       "\n",
       "var polyInOut = (function custom(e) {\n",
       "  e = +e;\n",
       "\n",
       "  function polyInOut(t) {\n",
       "    return ((t *= 2) <= 1 ? Math.pow(t, e) : 2 - Math.pow(2 - t, e)) / 2;\n",
       "  }\n",
       "\n",
       "  polyInOut.exponent = custom;\n",
       "\n",
       "  return polyInOut;\n",
       "})(exponent);\n",
       "\n",
       "var pi = Math.PI,\n",
       "    halfPi = pi / 2;\n",
       "\n",
       "function sinIn(t) {\n",
       "  return 1 - Math.cos(t * halfPi);\n",
       "}\n",
       "\n",
       "function sinOut(t) {\n",
       "  return Math.sin(t * halfPi);\n",
       "}\n",
       "\n",
       "function sinInOut(t) {\n",
       "  return (1 - Math.cos(pi * t)) / 2;\n",
       "}\n",
       "\n",
       "function expIn(t) {\n",
       "  return Math.pow(2, 10 * t - 10);\n",
       "}\n",
       "\n",
       "function expOut(t) {\n",
       "  return 1 - Math.pow(2, -10 * t);\n",
       "}\n",
       "\n",
       "function expInOut(t) {\n",
       "  return ((t *= 2) <= 1 ? Math.pow(2, 10 * t - 10) : 2 - Math.pow(2, 10 - 10 * t)) / 2;\n",
       "}\n",
       "\n",
       "function circleIn(t) {\n",
       "  return 1 - Math.sqrt(1 - t * t);\n",
       "}\n",
       "\n",
       "function circleOut(t) {\n",
       "  return Math.sqrt(1 - --t * t);\n",
       "}\n",
       "\n",
       "function circleInOut(t) {\n",
       "  return ((t *= 2) <= 1 ? 1 - Math.sqrt(1 - t * t) : Math.sqrt(1 - (t -= 2) * t) + 1) / 2;\n",
       "}\n",
       "\n",
       "var b1 = 4 / 11,\n",
       "    b2 = 6 / 11,\n",
       "    b3 = 8 / 11,\n",
       "    b4 = 3 / 4,\n",
       "    b5 = 9 / 11,\n",
       "    b6 = 10 / 11,\n",
       "    b7 = 15 / 16,\n",
       "    b8 = 21 / 22,\n",
       "    b9 = 63 / 64,\n",
       "    b0 = 1 / b1 / b1;\n",
       "\n",
       "function bounceIn(t) {\n",
       "  return 1 - bounceOut(1 - t);\n",
       "}\n",
       "\n",
       "function bounceOut(t) {\n",
       "  return (t = +t) < b1 ? b0 * t * t : t < b3 ? b0 * (t -= b2) * t + b4 : t < b6 ? b0 * (t -= b5) * t + b7 : b0 * (t -= b8) * t + b9;\n",
       "}\n",
       "\n",
       "function bounceInOut(t) {\n",
       "  return ((t *= 2) <= 1 ? 1 - bounceOut(1 - t) : bounceOut(t - 1) + 1) / 2;\n",
       "}\n",
       "\n",
       "var overshoot = 1.70158;\n",
       "\n",
       "var backIn = (function custom(s) {\n",
       "  s = +s;\n",
       "\n",
       "  function backIn(t) {\n",
       "    return t * t * ((s + 1) * t - s);\n",
       "  }\n",
       "\n",
       "  backIn.overshoot = custom;\n",
       "\n",
       "  return backIn;\n",
       "})(overshoot);\n",
       "\n",
       "var backOut = (function custom(s) {\n",
       "  s = +s;\n",
       "\n",
       "  function backOut(t) {\n",
       "    return --t * t * ((s + 1) * t + s) + 1;\n",
       "  }\n",
       "\n",
       "  backOut.overshoot = custom;\n",
       "\n",
       "  return backOut;\n",
       "})(overshoot);\n",
       "\n",
       "var backInOut = (function custom(s) {\n",
       "  s = +s;\n",
       "\n",
       "  function backInOut(t) {\n",
       "    return ((t *= 2) < 1 ? t * t * ((s + 1) * t - s) : (t -= 2) * t * ((s + 1) * t + s) + 2) / 2;\n",
       "  }\n",
       "\n",
       "  backInOut.overshoot = custom;\n",
       "\n",
       "  return backInOut;\n",
       "})(overshoot);\n",
       "\n",
       "var tau = 2 * Math.PI,\n",
       "    amplitude = 1,\n",
       "    period = 0.3;\n",
       "\n",
       "var elasticIn = (function custom(a, p) {\n",
       "  var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);\n",
       "\n",
       "  function elasticIn(t) {\n",
       "    return a * Math.pow(2, 10 * --t) * Math.sin((s - t) / p);\n",
       "  }\n",
       "\n",
       "  elasticIn.amplitude = function(a) { return custom(a, p * tau); };\n",
       "  elasticIn.period = function(p) { return custom(a, p); };\n",
       "\n",
       "  return elasticIn;\n",
       "})(amplitude, period);\n",
       "\n",
       "var elasticOut = (function custom(a, p) {\n",
       "  var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);\n",
       "\n",
       "  function elasticOut(t) {\n",
       "    return 1 - a * Math.pow(2, -10 * (t = +t)) * Math.sin((t + s) / p);\n",
       "  }\n",
       "\n",
       "  elasticOut.amplitude = function(a) { return custom(a, p * tau); };\n",
       "  elasticOut.period = function(p) { return custom(a, p); };\n",
       "\n",
       "  return elasticOut;\n",
       "})(amplitude, period);\n",
       "\n",
       "var elasticInOut = (function custom(a, p) {\n",
       "  var s = Math.asin(1 / (a = Math.max(1, a))) * (p /= tau);\n",
       "\n",
       "  function elasticInOut(t) {\n",
       "    return ((t = t * 2 - 1) < 0\n",
       "        ? a * Math.pow(2, 10 * t) * Math.sin((s - t) / p)\n",
       "        : 2 - a * Math.pow(2, -10 * t) * Math.sin((s + t) / p)) / 2;\n",
       "  }\n",
       "\n",
       "  elasticInOut.amplitude = function(a) { return custom(a, p * tau); };\n",
       "  elasticInOut.period = function(p) { return custom(a, p); };\n",
       "\n",
       "  return elasticInOut;\n",
       "})(amplitude, period);\n",
       "\n",
       "exports.easeBack = backInOut;\n",
       "exports.easeBackIn = backIn;\n",
       "exports.easeBackInOut = backInOut;\n",
       "exports.easeBackOut = backOut;\n",
       "exports.easeBounce = bounceOut;\n",
       "exports.easeBounceIn = bounceIn;\n",
       "exports.easeBounceInOut = bounceInOut;\n",
       "exports.easeBounceOut = bounceOut;\n",
       "exports.easeCircle = circleInOut;\n",
       "exports.easeCircleIn = circleIn;\n",
       "exports.easeCircleInOut = circleInOut;\n",
       "exports.easeCircleOut = circleOut;\n",
       "exports.easeCubic = cubicInOut;\n",
       "exports.easeCubicIn = cubicIn;\n",
       "exports.easeCubicInOut = cubicInOut;\n",
       "exports.easeCubicOut = cubicOut;\n",
       "exports.easeElastic = elasticOut;\n",
       "exports.easeElasticIn = elasticIn;\n",
       "exports.easeElasticInOut = elasticInOut;\n",
       "exports.easeElasticOut = elasticOut;\n",
       "exports.easeExp = expInOut;\n",
       "exports.easeExpIn = expIn;\n",
       "exports.easeExpInOut = expInOut;\n",
       "exports.easeExpOut = expOut;\n",
       "exports.easeLinear = linear;\n",
       "exports.easePoly = polyInOut;\n",
       "exports.easePolyIn = polyIn;\n",
       "exports.easePolyInOut = polyInOut;\n",
       "exports.easePolyOut = polyOut;\n",
       "exports.easeQuad = quadInOut;\n",
       "exports.easeQuadIn = quadIn;\n",
       "exports.easeQuadInOut = quadInOut;\n",
       "exports.easeQuadOut = quadOut;\n",
       "exports.easeSin = sinInOut;\n",
       "exports.easeSinIn = sinIn;\n",
       "exports.easeSinInOut = sinInOut;\n",
       "exports.easeSinOut = sinOut;\n",
       "\n",
       "Object.defineProperty(exports, '__esModule', { value: true });\n",
       "\n",
       "}));\n",
       "\n",
       "},{}],7:[function(require,module,exports){\n",
       "// https://d3js.org/d3-format/ v1.4.2 Copyright 2019 Mike Bostock\n",
       "(function (global, factory) {\n",
       "typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :\n",
       "typeof define === 'function' && define.amd ? define(['exports'], factory) :\n",
       "(global = global || self, factory(global.d3 = global.d3 || {}));\n",
       "}(this, function (exports) { 'use strict';\n",
       "\n",
       "// Computes the decimal coefficient and exponent of the specified number x with\n",
       "// significant digits p, where x is positive and p is in [1, 21] or undefined.\n",
       "// For example, formatDecimal(1.23) returns [\"123\", 0].\n",
       "function formatDecimal(x, p) {\n",
       "  if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf(\"e\")) < 0) return null; // NaN, +/-Infinity\n",
       "  var i, coefficient = x.slice(0, i);\n",
       "\n",
       "  // The string returned by toExponential either has the form \\d\\.\\d+e[-+]\\d+\n",
       "  // (e.g., 1.2e+3) or the form \\de[-+]\\d+ (e.g., 1e+3).\n",
       "  return [\n",
       "    coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient,\n",
       "    +x.slice(i + 1)\n",
       "  ];\n",
       "}\n",
       "\n",
       "function exponent(x) {\n",
       "  return x = formatDecimal(Math.abs(x)), x ? x[1] : NaN;\n",
       "}\n",
       "\n",
       "function formatGroup(grouping, thousands) {\n",
       "  return function(value, width) {\n",
       "    var i = value.length,\n",
       "        t = [],\n",
       "        j = 0,\n",
       "        g = grouping[0],\n",
       "        length = 0;\n",
       "\n",
       "    while (i > 0 && g > 0) {\n",
       "      if (length + g + 1 > width) g = Math.max(1, width - length);\n",
       "      t.push(value.substring(i -= g, i + g));\n",
       "      if ((length += g + 1) > width) break;\n",
       "      g = grouping[j = (j + 1) % grouping.length];\n",
       "    }\n",
       "\n",
       "    return t.reverse().join(thousands);\n",
       "  };\n",
       "}\n",
       "\n",
       "function formatNumerals(numerals) {\n",
       "  return function(value) {\n",
       "    return value.replace(/[0-9]/g, function(i) {\n",
       "      return numerals[+i];\n",
       "    });\n",
       "  };\n",
       "}\n",
       "\n",
       "// [[fill]align][sign][symbol][0][width][,][.precision][~][type]\n",
       "var re = /^(?:(.)?([<>=^]))?([+\\-( ])?([$#])?(0)?(\\d+)?(,)?(\\.\\d+)?(~)?([a-z%])?$/i;\n",
       "\n",
       "function formatSpecifier(specifier) {\n",
       "  if (!(match = re.exec(specifier))) throw new Error(\"invalid format: \" + specifier);\n",
       "  var match;\n",
       "  return new FormatSpecifier({\n",
       "    fill: match[1],\n",
       "    align: match[2],\n",
       "    sign: match[3],\n",
       "    symbol: match[4],\n",
       "    zero: match[5],\n",
       "    width: match[6],\n",
       "    comma: match[7],\n",
       "    precision: match[8] && match[8].slice(1),\n",
       "    trim: match[9],\n",
       "    type: match[10]\n",
       "  });\n",
       "}\n",
       "\n",
       "formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof\n",
       "\n",
       "function FormatSpecifier(specifier) {\n",
       "  this.fill = specifier.fill === undefined ? \" \" : specifier.fill + \"\";\n",
       "  this.align = specifier.align === undefined ? \">\" : specifier.align + \"\";\n",
       "  this.sign = specifier.sign === undefined ? \"-\" : specifier.sign + \"\";\n",
       "  this.symbol = specifier.symbol === undefined ? \"\" : specifier.symbol + \"\";\n",
       "  this.zero = !!specifier.zero;\n",
       "  this.width = specifier.width === undefined ? undefined : +specifier.width;\n",
       "  this.comma = !!specifier.comma;\n",
       "  this.precision = specifier.precision === undefined ? undefined : +specifier.precision;\n",
       "  this.trim = !!specifier.trim;\n",
       "  this.type = specifier.type === undefined ? \"\" : specifier.type + \"\";\n",
       "}\n",
       "\n",
       "FormatSpecifier.prototype.toString = function() {\n",
       "  return this.fill\n",
       "      + this.align\n",
       "      + this.sign\n",
       "      + this.symbol\n",
       "      + (this.zero ? \"0\" : \"\")\n",
       "      + (this.width === undefined ? \"\" : Math.max(1, this.width | 0))\n",
       "      + (this.comma ? \",\" : \"\")\n",
       "      + (this.precision === undefined ? \"\" : \".\" + Math.max(0, this.precision | 0))\n",
       "      + (this.trim ? \"~\" : \"\")\n",
       "      + this.type;\n",
       "};\n",
       "\n",
       "// Trims insignificant zeros, e.g., replaces 1.2000k with 1.2k.\n",
       "function formatTrim(s) {\n",
       "  out: for (var n = s.length, i = 1, i0 = -1, i1; i < n; ++i) {\n",
       "    switch (s[i]) {\n",
       "      case \".\": i0 = i1 = i; break;\n",
       "      case \"0\": if (i0 === 0) i0 = i; i1 = i; break;\n",
       "      default: if (i0 > 0) { if (!+s[i]) break out; i0 = 0; } break;\n",
       "    }\n",
       "  }\n",
       "  return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;\n",
       "}\n",
       "\n",
       "var prefixExponent;\n",
       "\n",
       "function formatPrefixAuto(x, p) {\n",
       "  var d = formatDecimal(x, p);\n",
       "  if (!d) return x + \"\";\n",
       "  var coefficient = d[0],\n",
       "      exponent = d[1],\n",
       "      i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,\n",
       "      n = coefficient.length;\n",
       "  return i === n ? coefficient\n",
       "      : i > n ? coefficient + new Array(i - n + 1).join(\"0\")\n",
       "      : i > 0 ? coefficient.slice(0, i) + \".\" + coefficient.slice(i)\n",
       "      : \"0.\" + new Array(1 - i).join(\"0\") + formatDecimal(x, Math.max(0, p + i - 1))[0]; // less than 1y!\n",
       "}\n",
       "\n",
       "function formatRounded(x, p) {\n",
       "  var d = formatDecimal(x, p);\n",
       "  if (!d) return x + \"\";\n",
       "  var coefficient = d[0],\n",
       "      exponent = d[1];\n",
       "  return exponent < 0 ? \"0.\" + new Array(-exponent).join(\"0\") + coefficient\n",
       "      : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + \".\" + coefficient.slice(exponent + 1)\n",
       "      : coefficient + new Array(exponent - coefficient.length + 2).join(\"0\");\n",
       "}\n",
       "\n",
       "var formatTypes = {\n",
       "  \"%\": function(x, p) { return (x * 100).toFixed(p); },\n",
       "  \"b\": function(x) { return Math.round(x).toString(2); },\n",
       "  \"c\": function(x) { return x + \"\"; },\n",
       "  \"d\": function(x) { return Math.round(x).toString(10); },\n",
       "  \"e\": function(x, p) { return x.toExponential(p); },\n",
       "  \"f\": function(x, p) { return x.toFixed(p); },\n",
       "  \"g\": function(x, p) { return x.toPrecision(p); },\n",
       "  \"o\": function(x) { return Math.round(x).toString(8); },\n",
       "  \"p\": function(x, p) { return formatRounded(x * 100, p); },\n",
       "  \"r\": formatRounded,\n",
       "  \"s\": formatPrefixAuto,\n",
       "  \"X\": function(x) { return Math.round(x).toString(16).toUpperCase(); },\n",
       "  \"x\": function(x) { return Math.round(x).toString(16); }\n",
       "};\n",
       "\n",
       "function identity(x) {\n",
       "  return x;\n",
       "}\n",
       "\n",
       "var map = Array.prototype.map,\n",
       "    prefixes = [\"y\",\"z\",\"a\",\"f\",\"p\",\"n\",\"u\",\"m\",\"\",\"k\",\"M\",\"G\",\"T\",\"P\",\"E\",\"Z\",\"Y\"];\n",
       "\n",
       "function formatLocale(locale) {\n",
       "  var group = locale.grouping === undefined || locale.thousands === undefined ? identity : formatGroup(map.call(locale.grouping, Number), locale.thousands + \"\"),\n",
       "      currencyPrefix = locale.currency === undefined ? \"\" : locale.currency[0] + \"\",\n",
       "      currencySuffix = locale.currency === undefined ? \"\" : locale.currency[1] + \"\",\n",
       "      decimal = locale.decimal === undefined ? \".\" : locale.decimal + \"\",\n",
       "      numerals = locale.numerals === undefined ? identity : formatNumerals(map.call(locale.numerals, String)),\n",
       "      percent = locale.percent === undefined ? \"%\" : locale.percent + \"\",\n",
       "      minus = locale.minus === undefined ? \"-\" : locale.minus + \"\",\n",
       "      nan = locale.nan === undefined ? \"NaN\" : locale.nan + \"\";\n",
       "\n",
       "  function newFormat(specifier) {\n",
       "    specifier = formatSpecifier(specifier);\n",
       "\n",
       "    var fill = specifier.fill,\n",
       "        align = specifier.align,\n",
       "        sign = specifier.sign,\n",
       "        symbol = specifier.symbol,\n",
       "        zero = specifier.zero,\n",
       "        width = specifier.width,\n",
       "        comma = specifier.comma,\n",
       "        precision = specifier.precision,\n",
       "        trim = specifier.trim,\n",
       "        type = specifier.type;\n",
       "\n",
       "    // The \"n\" type is an alias for \",g\".\n",
       "    if (type === \"n\") comma = true, type = \"g\";\n",
       "\n",
       "    // The \"\" type, and any invalid type, is an alias for \".12~g\".\n",
       "    else if (!formatTypes[type]) precision === undefined && (precision = 12), trim = true, type = \"g\";\n",
       "\n",
       "    // If zero fill is specified, padding goes after sign and before digits.\n",
       "    if (zero || (fill === \"0\" && align === \"=\")) zero = true, fill = \"0\", align = \"=\";\n",
       "\n",
       "    // Compute the prefix and suffix.\n",
       "    // For SI-prefix, the suffix is lazily computed.\n",
       "    var prefix = symbol === \"$\" ? currencyPrefix : symbol === \"#\" && /[boxX]/.test(type) ? \"0\" + type.toLowerCase() : \"\",\n",
       "        suffix = symbol === \"$\" ? currencySuffix : /[%p]/.test(type) ? percent : \"\";\n",
       "\n",
       "    // What format function should we use?\n",
       "    // Is this an integer type?\n",
       "    // Can this type generate exponential notation?\n",
       "    var formatType = formatTypes[type],\n",
       "        maybeSuffix = /[defgprs%]/.test(type);\n",
       "\n",
       "    // Set the default precision if not specified,\n",
       "    // or clamp the specified precision to the supported range.\n",
       "    // For significant precision, it must be in [1, 21].\n",
       "    // For fixed precision, it must be in [0, 20].\n",
       "    precision = precision === undefined ? 6\n",
       "        : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision))\n",
       "        : Math.max(0, Math.min(20, precision));\n",
       "\n",
       "    function format(value) {\n",
       "      var valuePrefix = prefix,\n",
       "          valueSuffix = suffix,\n",
       "          i, n, c;\n",
       "\n",
       "      if (type === \"c\") {\n",
       "        valueSuffix = formatType(value) + valueSuffix;\n",
       "        value = \"\";\n",
       "      } else {\n",
       "        value = +value;\n",
       "\n",
       "        // Perform the initial formatting.\n",
       "        var valueNegative = value < 0;\n",
       "        value = isNaN(value) ? nan : formatType(Math.abs(value), precision);\n",
       "\n",
       "        // Trim insignificant zeros.\n",
       "        if (trim) value = formatTrim(value);\n",
       "\n",
       "        // If a negative value rounds to zero during formatting, treat as positive.\n",
       "        if (valueNegative && +value === 0) valueNegative = false;\n",
       "\n",
       "        // Compute the prefix and suffix.\n",
       "        valuePrefix = (valueNegative ? (sign === \"(\" ? sign : minus) : sign === \"-\" || sign === \"(\" ? \"\" : sign) + valuePrefix;\n",
       "\n",
       "        valueSuffix = (type === \"s\" ? prefixes[8 + prefixExponent / 3] : \"\") + valueSuffix + (valueNegative && sign === \"(\" ? \")\" : \"\");\n",
       "\n",
       "        // Break the formatted value into the integer \"value\" part that can be\n",
       "        // grouped, and fractional or exponential \"suffix\" part that is not.\n",
       "        if (maybeSuffix) {\n",
       "          i = -1, n = value.length;\n",
       "          while (++i < n) {\n",
       "            if (c = value.charCodeAt(i), 48 > c || c > 57) {\n",
       "              valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;\n",
       "              value = value.slice(0, i);\n",
       "              break;\n",
       "            }\n",
       "          }\n",
       "        }\n",
       "      }\n",
       "\n",
       "      // If the fill character is not \"0\", grouping is applied before padding.\n",
       "      if (comma && !zero) value = group(value, Infinity);\n",
       "\n",
       "      // Compute the padding.\n",
       "      var length = valuePrefix.length + value.length + valueSuffix.length,\n",
       "          padding = length < width ? new Array(width - length + 1).join(fill) : \"\";\n",
       "\n",
       "      // If the fill character is \"0\", grouping is applied after padding.\n",
       "      if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = \"\";\n",
       "\n",
       "      // Reconstruct the final output based on the desired alignment.\n",
       "      switch (align) {\n",
       "        case \"<\": value = valuePrefix + value + valueSuffix + padding; break;\n",
       "        case \"=\": value = valuePrefix + padding + value + valueSuffix; break;\n",
       "        case \"^\": value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length); break;\n",
       "        default: value = padding + valuePrefix + value + valueSuffix; break;\n",
       "      }\n",
       "\n",
       "      return numerals(value);\n",
       "    }\n",
       "\n",
       "    format.toString = function() {\n",
       "      return specifier + \"\";\n",
       "    };\n",
       "\n",
       "    return format;\n",
       "  }\n",
       "\n",
       "  function formatPrefix(specifier, value) {\n",
       "    var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = \"f\", specifier)),\n",
       "        e = Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3,\n",
       "        k = Math.pow(10, -e),\n",
       "        prefix = prefixes[8 + e / 3];\n",
       "    return function(value) {\n",
       "      return f(k * value) + prefix;\n",
       "    };\n",
       "  }\n",
       "\n",
       "  return {\n",
       "    format: newFormat,\n",
       "    formatPrefix: formatPrefix\n",
       "  };\n",
       "}\n",
       "\n",
       "var locale;\n",
       "\n",
       "defaultLocale({\n",
       "  decimal: \".\",\n",
       "  thousands: \",\",\n",
       "  grouping: [3],\n",
       "  currency: [\"$\", \"\"],\n",
       "  minus: \"-\"\n",
       "});\n",
       "\n",
       "function defaultLocale(definition) {\n",
       "  locale = formatLocale(definition);\n",
       "  exports.format = locale.format;\n",
       "  exports.formatPrefix = locale.formatPrefix;\n",
       "  return locale;\n",
       "}\n",
       "\n",
       "function precisionFixed(step) {\n",
       "  return Math.max(0, -exponent(Math.abs(step)));\n",
       "}\n",
       "\n",
       "function precisionPrefix(step, value) {\n",
       "  return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3 - exponent(Math.abs(step)));\n",
       "}\n",
       "\n",
       "function precisionRound(step, max) {\n",
       "  step = Math.abs(step), max = Math.abs(max) - step;\n",
       "  return Math.max(0, exponent(max) - exponent(step)) + 1;\n",
       "}\n",
       "\n",
       "exports.FormatSpecifier = FormatSpecifier;\n",
       "exports.formatDefaultLocale = defaultLocale;\n",
       "exports.formatLocale = formatLocale;\n",
       "exports.formatSpecifier = formatSpecifier;\n",
       "exports.precisionFixed = precisionFixed;\n",
       "exports.precisionPrefix = precisionPrefix;\n",
       "exports.precisionRound = precisionRound;\n",
       "\n",
       "Object.defineProperty(exports, '__esModule', { value: true });\n",
       "\n",
       "}));\n",
       "\n",
       "},{}],8:[function(require,module,exports){\n",
       "// https://d3js.org/d3-interpolate/ v1.4.0 Copyright 2019 Mike Bostock\n",
       "(function (global, factory) {\n",
       "typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-color')) :\n",
       "typeof define === 'function' && define.amd ? define(['exports', 'd3-color'], factory) :\n",
       "(global = global || self, factory(global.d3 = global.d3 || {}, global.d3));\n",
       "}(this, function (exports, d3Color) { 'use strict';\n",
       "\n",
       "function basis(t1, v0, v1, v2, v3) {\n",
       "  var t2 = t1 * t1, t3 = t2 * t1;\n",
       "  return ((1 - 3 * t1 + 3 * t2 - t3) * v0\n",
       "      + (4 - 6 * t2 + 3 * t3) * v1\n",
       "      + (1 + 3 * t1 + 3 * t2 - 3 * t3) * v2\n",
       "      + t3 * v3) / 6;\n",
       "}\n",
       "\n",
       "function basis$1(values) {\n",
       "  var n = values.length - 1;\n",
       "  return function(t) {\n",
       "    var i = t <= 0 ? (t = 0) : t >= 1 ? (t = 1, n - 1) : Math.floor(t * n),\n",
       "        v1 = values[i],\n",
       "        v2 = values[i + 1],\n",
       "        v0 = i > 0 ? values[i - 1] : 2 * v1 - v2,\n",
       "        v3 = i < n - 1 ? values[i + 2] : 2 * v2 - v1;\n",
       "    return basis((t - i / n) * n, v0, v1, v2, v3);\n",
       "  };\n",
       "}\n",
       "\n",
       "function basisClosed(values) {\n",
       "  var n = values.length;\n",
       "  return function(t) {\n",
       "    var i = Math.floor(((t %= 1) < 0 ? ++t : t) * n),\n",
       "        v0 = values[(i + n - 1) % n],\n",
       "        v1 = values[i % n],\n",
       "        v2 = values[(i + 1) % n],\n",
       "        v3 = values[(i + 2) % n];\n",
       "    return basis((t - i / n) * n, v0, v1, v2, v3);\n",
       "  };\n",
       "}\n",
       "\n",
       "function constant(x) {\n",
       "  return function() {\n",
       "    return x;\n",
       "  };\n",
       "}\n",
       "\n",
       "function linear(a, d) {\n",
       "  return function(t) {\n",
       "    return a + t * d;\n",
       "  };\n",
       "}\n",
       "\n",
       "function exponential(a, b, y) {\n",
       "  return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function(t) {\n",
       "    return Math.pow(a + t * b, y);\n",
       "  };\n",
       "}\n",
       "\n",
       "function hue(a, b) {\n",
       "  var d = b - a;\n",
       "  return d ? linear(a, d > 180 || d < -180 ? d - 360 * Math.round(d / 360) : d) : constant(isNaN(a) ? b : a);\n",
       "}\n",
       "\n",
       "function gamma(y) {\n",
       "  return (y = +y) === 1 ? nogamma : function(a, b) {\n",
       "    return b - a ? exponential(a, b, y) : constant(isNaN(a) ? b : a);\n",
       "  };\n",
       "}\n",
       "\n",
       "function nogamma(a, b) {\n",
       "  var d = b - a;\n",
       "  return d ? linear(a, d) : constant(isNaN(a) ? b : a);\n",
       "}\n",
       "\n",
       "var rgb = (function rgbGamma(y) {\n",
       "  var color = gamma(y);\n",
       "\n",
       "  function rgb(start, end) {\n",
       "    var r = color((start = d3Color.rgb(start)).r, (end = d3Color.rgb(end)).r),\n",
       "        g = color(start.g, end.g),\n",
       "        b = color(start.b, end.b),\n",
       "        opacity = nogamma(start.opacity, end.opacity);\n",
       "    return function(t) {\n",
       "      start.r = r(t);\n",
       "      start.g = g(t);\n",
       "      start.b = b(t);\n",
       "      start.opacity = opacity(t);\n",
       "      return start + \"\";\n",
       "    };\n",
       "  }\n",
       "\n",
       "  rgb.gamma = rgbGamma;\n",
       "\n",
       "  return rgb;\n",
       "})(1);\n",
       "\n",
       "function rgbSpline(spline) {\n",
       "  return function(colors) {\n",
       "    var n = colors.length,\n",
       "        r = new Array(n),\n",
       "        g = new Array(n),\n",
       "        b = new Array(n),\n",
       "        i, color;\n",
       "    for (i = 0; i < n; ++i) {\n",
       "      color = d3Color.rgb(colors[i]);\n",
       "      r[i] = color.r || 0;\n",
       "      g[i] = color.g || 0;\n",
       "      b[i] = color.b || 0;\n",
       "    }\n",
       "    r = spline(r);\n",
       "    g = spline(g);\n",
       "    b = spline(b);\n",
       "    color.opacity = 1;\n",
       "    return function(t) {\n",
       "      color.r = r(t);\n",
       "      color.g = g(t);\n",
       "      color.b = b(t);\n",
       "      return color + \"\";\n",
       "    };\n",
       "  };\n",
       "}\n",
       "\n",
       "var rgbBasis = rgbSpline(basis$1);\n",
       "var rgbBasisClosed = rgbSpline(basisClosed);\n",
       "\n",
       "function numberArray(a, b) {\n",
       "  if (!b) b = [];\n",
       "  var n = a ? Math.min(b.length, a.length) : 0,\n",
       "      c = b.slice(),\n",
       "      i;\n",
       "  return function(t) {\n",
       "    for (i = 0; i < n; ++i) c[i] = a[i] * (1 - t) + b[i] * t;\n",
       "    return c;\n",
       "  };\n",
       "}\n",
       "\n",
       "function isNumberArray(x) {\n",
       "  return ArrayBuffer.isView(x) && !(x instanceof DataView);\n",
       "}\n",
       "\n",
       "function array(a, b) {\n",
       "  return (isNumberArray(b) ? numberArray : genericArray)(a, b);\n",
       "}\n",
       "\n",
       "function genericArray(a, b) {\n",
       "  var nb = b ? b.length : 0,\n",
       "      na = a ? Math.min(nb, a.length) : 0,\n",
       "      x = new Array(na),\n",
       "      c = new Array(nb),\n",
       "      i;\n",
       "\n",
       "  for (i = 0; i < na; ++i) x[i] = value(a[i], b[i]);\n",
       "  for (; i < nb; ++i) c[i] = b[i];\n",
       "\n",
       "  return function(t) {\n",
       "    for (i = 0; i < na; ++i) c[i] = x[i](t);\n",
       "    return c;\n",
       "  };\n",
       "}\n",
       "\n",
       "function date(a, b) {\n",
       "  var d = new Date;\n",
       "  return a = +a, b = +b, function(t) {\n",
       "    return d.setTime(a * (1 - t) + b * t), d;\n",
       "  };\n",
       "}\n",
       "\n",
       "function number(a, b) {\n",
       "  return a = +a, b = +b, function(t) {\n",
       "    return a * (1 - t) + b * t;\n",
       "  };\n",
       "}\n",
       "\n",
       "function object(a, b) {\n",
       "  var i = {},\n",
       "      c = {},\n",
       "      k;\n",
       "\n",
       "  if (a === null || typeof a !== \"object\") a = {};\n",
       "  if (b === null || typeof b !== \"object\") b = {};\n",
       "\n",
       "  for (k in b) {\n",
       "    if (k in a) {\n",
       "      i[k] = value(a[k], b[k]);\n",
       "    } else {\n",
       "      c[k] = b[k];\n",
       "    }\n",
       "  }\n",
       "\n",
       "  return function(t) {\n",
       "    for (k in i) c[k] = i[k](t);\n",
       "    return c;\n",
       "  };\n",
       "}\n",
       "\n",
       "var reA = /[-+]?(?:\\d+\\.?\\d*|\\.?\\d+)(?:[eE][-+]?\\d+)?/g,\n",
       "    reB = new RegExp(reA.source, \"g\");\n",
       "\n",
       "function zero(b) {\n",
       "  return function() {\n",
       "    return b;\n",
       "  };\n",
       "}\n",
       "\n",
       "function one(b) {\n",
       "  return function(t) {\n",
       "    return b(t) + \"\";\n",
       "  };\n",
       "}\n",
       "\n",
       "function string(a, b) {\n",
       "  var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b\n",
       "      am, // current match in a\n",
       "      bm, // current match in b\n",
       "      bs, // string preceding current number in b, if any\n",
       "      i = -1, // index in s\n",
       "      s = [], // string constants and placeholders\n",
       "      q = []; // number interpolators\n",
       "\n",
       "  // Coerce inputs to strings.\n",
       "  a = a + \"\", b = b + \"\";\n",
       "\n",
       "  // Interpolate pairs of numbers in a & b.\n",
       "  while ((am = reA.exec(a))\n",
       "      && (bm = reB.exec(b))) {\n",
       "    if ((bs = bm.index) > bi) { // a string precedes the next number in b\n",
       "      bs = b.slice(bi, bs);\n",
       "      if (s[i]) s[i] += bs; // coalesce with previous string\n",
       "      else s[++i] = bs;\n",
       "    }\n",
       "    if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match\n",
       "      if (s[i]) s[i] += bm; // coalesce with previous string\n",
       "      else s[++i] = bm;\n",
       "    } else { // interpolate non-matching numbers\n",
       "      s[++i] = null;\n",
       "      q.push({i: i, x: number(am, bm)});\n",
       "    }\n",
       "    bi = reB.lastIndex;\n",
       "  }\n",
       "\n",
       "  // Add remains of b.\n",
       "  if (bi < b.length) {\n",
       "    bs = b.slice(bi);\n",
       "    if (s[i]) s[i] += bs; // coalesce with previous string\n",
       "    else s[++i] = bs;\n",
       "  }\n",
       "\n",
       "  // Special optimization for only a single match.\n",
       "  // Otherwise, interpolate each of the numbers and rejoin the string.\n",
       "  return s.length < 2 ? (q[0]\n",
       "      ? one(q[0].x)\n",
       "      : zero(b))\n",
       "      : (b = q.length, function(t) {\n",
       "          for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t);\n",
       "          return s.join(\"\");\n",
       "        });\n",
       "}\n",
       "\n",
       "function value(a, b) {\n",
       "  var t = typeof b, c;\n",
       "  return b == null || t === \"boolean\" ? constant(b)\n",
       "      : (t === \"number\" ? number\n",
       "      : t === \"string\" ? ((c = d3Color.color(b)) ? (b = c, rgb) : string)\n",
       "      : b instanceof d3Color.color ? rgb\n",
       "      : b instanceof Date ? date\n",
       "      : isNumberArray(b) ? numberArray\n",
       "      : Array.isArray(b) ? genericArray\n",
       "      : typeof b.valueOf !== \"function\" && typeof b.toString !== \"function\" || isNaN(b) ? object\n",
       "      : number)(a, b);\n",
       "}\n",
       "\n",
       "function discrete(range) {\n",
       "  var n = range.length;\n",
       "  return function(t) {\n",
       "    return range[Math.max(0, Math.min(n - 1, Math.floor(t * n)))];\n",
       "  };\n",
       "}\n",
       "\n",
       "function hue$1(a, b) {\n",
       "  var i = hue(+a, +b);\n",
       "  return function(t) {\n",
       "    var x = i(t);\n",
       "    return x - 360 * Math.floor(x / 360);\n",
       "  };\n",
       "}\n",
       "\n",
       "function round(a, b) {\n",
       "  return a = +a, b = +b, function(t) {\n",
       "    return Math.round(a * (1 - t) + b * t);\n",
       "  };\n",
       "}\n",
       "\n",
       "var degrees = 180 / Math.PI;\n",
       "\n",
       "var identity = {\n",
       "  translateX: 0,\n",
       "  translateY: 0,\n",
       "  rotate: 0,\n",
       "  skewX: 0,\n",
       "  scaleX: 1,\n",
       "  scaleY: 1\n",
       "};\n",
       "\n",
       "function decompose(a, b, c, d, e, f) {\n",
       "  var scaleX, scaleY, skewX;\n",
       "  if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;\n",
       "  if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;\n",
       "  if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;\n",
       "  if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;\n",
       "  return {\n",
       "    translateX: e,\n",
       "    translateY: f,\n",
       "    rotate: Math.atan2(b, a) * degrees,\n",
       "    skewX: Math.atan(skewX) * degrees,\n",
       "    scaleX: scaleX,\n",
       "    scaleY: scaleY\n",
       "  };\n",
       "}\n",
       "\n",
       "var cssNode,\n",
       "    cssRoot,\n",
       "    cssView,\n",
       "    svgNode;\n",
       "\n",
       "function parseCss(value) {\n",
       "  if (value === \"none\") return identity;\n",
       "  if (!cssNode) cssNode = document.createElement(\"DIV\"), cssRoot = document.documentElement, cssView = document.defaultView;\n",
       "  cssNode.style.transform = value;\n",
       "  value = cssView.getComputedStyle(cssRoot.appendChild(cssNode), null).getPropertyValue(\"transform\");\n",
       "  cssRoot.removeChild(cssNode);\n",
       "  value = value.slice(7, -1).split(\",\");\n",
       "  return decompose(+value[0], +value[1], +value[2], +value[3], +value[4], +value[5]);\n",
       "}\n",
       "\n",
       "function parseSvg(value) {\n",
       "  if (value == null) return identity;\n",
       "  if (!svgNode) svgNode = document.createElementNS(\"http://www.w3.org/2000/svg\", \"g\");\n",
       "  svgNode.setAttribute(\"transform\", value);\n",
       "  if (!(value = svgNode.transform.baseVal.consolidate())) return identity;\n",
       "  value = value.matrix;\n",
       "  return decompose(value.a, value.b, value.c, value.d, value.e, value.f);\n",
       "}\n",
       "\n",
       "function interpolateTransform(parse, pxComma, pxParen, degParen) {\n",
       "\n",
       "  function pop(s) {\n",
       "    return s.length ? s.pop() + \" \" : \"\";\n",
       "  }\n",
       "\n",
       "  function translate(xa, ya, xb, yb, s, q) {\n",
       "    if (xa !== xb || ya !== yb) {\n",
       "      var i = s.push(\"translate(\", null, pxComma, null, pxParen);\n",
       "      q.push({i: i - 4, x: number(xa, xb)}, {i: i - 2, x: number(ya, yb)});\n",
       "    } else if (xb || yb) {\n",
       "      s.push(\"translate(\" + xb + pxComma + yb + pxParen);\n",
       "    }\n",
       "  }\n",
       "\n",
       "  function rotate(a, b, s, q) {\n",
       "    if (a !== b) {\n",
       "      if (a - b > 180) b += 360; else if (b - a > 180) a += 360; // shortest path\n",
       "      q.push({i: s.push(pop(s) + \"rotate(\", null, degParen) - 2, x: number(a, b)});\n",
       "    } else if (b) {\n",
       "      s.push(pop(s) + \"rotate(\" + b + degParen);\n",
       "    }\n",
       "  }\n",
       "\n",
       "  function skewX(a, b, s, q) {\n",
       "    if (a !== b) {\n",
       "      q.push({i: s.push(pop(s) + \"skewX(\", null, degParen) - 2, x: number(a, b)});\n",
       "    } else if (b) {\n",
       "      s.push(pop(s) + \"skewX(\" + b + degParen);\n",
       "    }\n",
       "  }\n",
       "\n",
       "  function scale(xa, ya, xb, yb, s, q) {\n",
       "    if (xa !== xb || ya !== yb) {\n",
       "      var i = s.push(pop(s) + \"scale(\", null, \",\", null, \")\");\n",
       "      q.push({i: i - 4, x: number(xa, xb)}, {i: i - 2, x: number(ya, yb)});\n",
       "    } else if (xb !== 1 || yb !== 1) {\n",
       "      s.push(pop(s) + \"scale(\" + xb + \",\" + yb + \")\");\n",
       "    }\n",
       "  }\n",
       "\n",
       "  return function(a, b) {\n",
       "    var s = [], // string constants and placeholders\n",
       "        q = []; // number interpolators\n",
       "    a = parse(a), b = parse(b);\n",
       "    translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);\n",
       "    rotate(a.rotate, b.rotate, s, q);\n",
       "    skewX(a.skewX, b.skewX, s, q);\n",
       "    scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);\n",
       "    a = b = null; // gc\n",
       "    return function(t) {\n",
       "      var i = -1, n = q.length, o;\n",
       "      while (++i < n) s[(o = q[i]).i] = o.x(t);\n",
       "      return s.join(\"\");\n",
       "    };\n",
       "  };\n",
       "}\n",
       "\n",
       "var interpolateTransformCss = interpolateTransform(parseCss, \"px, \", \"px)\", \"deg)\");\n",
       "var interpolateTransformSvg = interpolateTransform(parseSvg, \", \", \")\", \")\");\n",
       "\n",
       "var rho = Math.SQRT2,\n",
       "    rho2 = 2,\n",
       "    rho4 = 4,\n",
       "    epsilon2 = 1e-12;\n",
       "\n",
       "function cosh(x) {\n",
       "  return ((x = Math.exp(x)) + 1 / x) / 2;\n",
       "}\n",
       "\n",
       "function sinh(x) {\n",
       "  return ((x = Math.exp(x)) - 1 / x) / 2;\n",
       "}\n",
       "\n",
       "function tanh(x) {\n",
       "  return ((x = Math.exp(2 * x)) - 1) / (x + 1);\n",
       "}\n",
       "\n",
       "// p0 = [ux0, uy0, w0]\n",
       "// p1 = [ux1, uy1, w1]\n",
       "function zoom(p0, p1) {\n",
       "  var ux0 = p0[0], uy0 = p0[1], w0 = p0[2],\n",
       "      ux1 = p1[0], uy1 = p1[1], w1 = p1[2],\n",
       "      dx = ux1 - ux0,\n",
       "      dy = uy1 - uy0,\n",
       "      d2 = dx * dx + dy * dy,\n",
       "      i,\n",
       "      S;\n",
       "\n",
       "  // Special case for u0  u1.\n",
       "  if (d2 < epsilon2) {\n",
       "    S = Math.log(w1 / w0) / rho;\n",
       "    i = function(t) {\n",
       "      return [\n",
       "        ux0 + t * dx,\n",
       "        uy0 + t * dy,\n",
       "        w0 * Math.exp(rho * t * S)\n",
       "      ];\n",
       "    };\n",
       "  }\n",
       "\n",
       "  // General case.\n",
       "  else {\n",
       "    var d1 = Math.sqrt(d2),\n",
       "        b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),\n",
       "        b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),\n",
       "        r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),\n",
       "        r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);\n",
       "    S = (r1 - r0) / rho;\n",
       "    i = function(t) {\n",
       "      var s = t * S,\n",
       "          coshr0 = cosh(r0),\n",
       "          u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));\n",
       "      return [\n",
       "        ux0 + u * dx,\n",
       "        uy0 + u * dy,\n",
       "        w0 * coshr0 / cosh(rho * s + r0)\n",
       "      ];\n",
       "    };\n",
       "  }\n",
       "\n",
       "  i.duration = S * 1000;\n",
       "\n",
       "  return i;\n",
       "}\n",
       "\n",
       "function hsl(hue) {\n",
       "  return function(start, end) {\n",
       "    var h = hue((start = d3Color.hsl(start)).h, (end = d3Color.hsl(end)).h),\n",
       "        s = nogamma(start.s, end.s),\n",
       "        l = nogamma(start.l, end.l),\n",
       "        opacity = nogamma(start.opacity, end.opacity);\n",
       "    return function(t) {\n",
       "      start.h = h(t);\n",
       "      start.s = s(t);\n",
       "      start.l = l(t);\n",
       "      start.opacity = opacity(t);\n",
       "      return start + \"\";\n",
       "    };\n",
       "  }\n",
       "}\n",
       "\n",
       "var hsl$1 = hsl(hue);\n",
       "var hslLong = hsl(nogamma);\n",
       "\n",
       "function lab(start, end) {\n",
       "  var l = nogamma((start = d3Color.lab(start)).l, (end = d3Color.lab(end)).l),\n",
       "      a = nogamma(start.a, end.a),\n",
       "      b = nogamma(start.b, end.b),\n",
       "      opacity = nogamma(start.opacity, end.opacity);\n",
       "  return function(t) {\n",
       "    start.l = l(t);\n",
       "    start.a = a(t);\n",
       "    start.b = b(t);\n",
       "    start.opacity = opacity(t);\n",
       "    return start + \"\";\n",
       "  };\n",
       "}\n",
       "\n",
       "function hcl(hue) {\n",
       "  return function(start, end) {\n",
       "    var h = hue((start = d3Color.hcl(start)).h, (end = d3Color.hcl(end)).h),\n",
       "        c = nogamma(start.c, end.c),\n",
       "        l = nogamma(start.l, end.l),\n",
       "        opacity = nogamma(start.opacity, end.opacity);\n",
       "    return function(t) {\n",
       "      start.h = h(t);\n",
       "      start.c = c(t);\n",
       "      start.l = l(t);\n",
       "      start.opacity = opacity(t);\n",
       "      return start + \"\";\n",
       "    };\n",
       "  }\n",
       "}\n",
       "\n",
       "var hcl$1 = hcl(hue);\n",
       "var hclLong = hcl(nogamma);\n",
       "\n",
       "function cubehelix(hue) {\n",
       "  return (function cubehelixGamma(y) {\n",
       "    y = +y;\n",
       "\n",
       "    function cubehelix(start, end) {\n",
       "      var h = hue((start = d3Color.cubehelix(start)).h, (end = d3Color.cubehelix(end)).h),\n",
       "          s = nogamma(start.s, end.s),\n",
       "          l = nogamma(start.l, end.l),\n",
       "          opacity = nogamma(start.opacity, end.opacity);\n",
       "      return function(t) {\n",
       "        start.h = h(t);\n",
       "        start.s = s(t);\n",
       "        start.l = l(Math.pow(t, y));\n",
       "        start.opacity = opacity(t);\n",
       "        return start + \"\";\n",
       "      };\n",
       "    }\n",
       "\n",
       "    cubehelix.gamma = cubehelixGamma;\n",
       "\n",
       "    return cubehelix;\n",
       "  })(1);\n",
       "}\n",
       "\n",
       "var cubehelix$1 = cubehelix(hue);\n",
       "var cubehelixLong = cubehelix(nogamma);\n",
       "\n",
       "function piecewise(interpolate, values) {\n",
       "  var i = 0, n = values.length - 1, v = values[0], I = new Array(n < 0 ? 0 : n);\n",
       "  while (i < n) I[i] = interpolate(v, v = values[++i]);\n",
       "  return function(t) {\n",
       "    var i = Math.max(0, Math.min(n - 1, Math.floor(t *= n)));\n",
       "    return I[i](t - i);\n",
       "  };\n",
       "}\n",
       "\n",
       "function quantize(interpolator, n) {\n",
       "  var samples = new Array(n);\n",
       "  for (var i = 0; i < n; ++i) samples[i] = interpolator(i / (n - 1));\n",
       "  return samples;\n",
       "}\n",
       "\n",
       "exports.interpolate = value;\n",
       "exports.interpolateArray = array;\n",
       "exports.interpolateBasis = basis$1;\n",
       "exports.interpolateBasisClosed = basisClosed;\n",
       "exports.interpolateCubehelix = cubehelix$1;\n",
       "exports.interpolateCubehelixLong = cubehelixLong;\n",
       "exports.interpolateDate = date;\n",
       "exports.interpolateDiscrete = discrete;\n",
       "exports.interpolateHcl = hcl$1;\n",
       "exports.interpolateHclLong = hclLong;\n",
       "exports.interpolateHsl = hsl$1;\n",
       "exports.interpolateHslLong = hslLong;\n",
       "exports.interpolateHue = hue$1;\n",
       "exports.interpolateLab = lab;\n",
       "exports.interpolateNumber = number;\n",
       "exports.interpolateNumberArray = numberArray;\n",
       "exports.interpolateObject = object;\n",
       "exports.interpolateRgb = rgb;\n",
       "exports.interpolateRgbBasis = rgbBasis;\n",
       "exports.interpolateRgbBasisClosed = rgbBasisClosed;\n",
       "exports.interpolateRound = round;\n",
       "exports.interpolateString = string;\n",
       "exports.interpolateTransformCss = interpolateTransformCss;\n",
       "exports.interpolateTransformSvg = interpolateTransformSvg;\n",
       "exports.interpolateZoom = zoom;\n",
       "exports.piecewise = piecewise;\n",
       "exports.quantize = quantize;\n",
       "\n",
       "Object.defineProperty(exports, '__esModule', { value: true });\n",
       "\n",
       "}));\n",
       "\n",
       "},{\"d3-color\":4}],9:[function(require,module,exports){\n",
       "// https://d3js.org/d3-path/ v1.0.9 Copyright 2019 Mike Bostock\n",
       "(function (global, factory) {\n",
       "typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :\n",
       "typeof define === 'function' && define.amd ? define(['exports'], factory) :\n",
       "(global = global || self, factory(global.d3 = global.d3 || {}));\n",
       "}(this, function (exports) { 'use strict';\n",
       "\n",
       "var pi = Math.PI,\n",
       "    tau = 2 * pi,\n",
       "    epsilon = 1e-6,\n",
       "    tauEpsilon = tau - epsilon;\n",
       "\n",
       "function Path() {\n",
       "  this._x0 = this._y0 = // start of current subpath\n",
       "  this._x1 = this._y1 = null; // end of current subpath\n",
       "  this._ = \"\";\n",
       "}\n",
       "\n",
       "function path() {\n",
       "  return new Path;\n",
       "}\n",
       "\n",
       "Path.prototype = path.prototype = {\n",
       "  constructor: Path,\n",
       "  moveTo: function(x, y) {\n",
       "    this._ += \"M\" + (this._x0 = this._x1 = +x) + \",\" + (this._y0 = this._y1 = +y);\n",
       "  },\n",
       "  closePath: function() {\n",
       "    if (this._x1 !== null) {\n",
       "      this._x1 = this._x0, this._y1 = this._y0;\n",
       "      this._ += \"Z\";\n",
       "    }\n",
       "  },\n",
       "  lineTo: function(x, y) {\n",
       "    this._ += \"L\" + (this._x1 = +x) + \",\" + (this._y1 = +y);\n",
       "  },\n",
       "  quadraticCurveTo: function(x1, y1, x, y) {\n",
       "    this._ += \"Q\" + (+x1) + \",\" + (+y1) + \",\" + (this._x1 = +x) + \",\" + (this._y1 = +y);\n",
       "  },\n",
       "  bezierCurveTo: function(x1, y1, x2, y2, x, y) {\n",
       "    this._ += \"C\" + (+x1) + \",\" + (+y1) + \",\" + (+x2) + \",\" + (+y2) + \",\" + (this._x1 = +x) + \",\" + (this._y1 = +y);\n",
       "  },\n",
       "  arcTo: function(x1, y1, x2, y2, r) {\n",
       "    x1 = +x1, y1 = +y1, x2 = +x2, y2 = +y2, r = +r;\n",
       "    var x0 = this._x1,\n",
       "        y0 = this._y1,\n",
       "        x21 = x2 - x1,\n",
       "        y21 = y2 - y1,\n",
       "        x01 = x0 - x1,\n",
       "        y01 = y0 - y1,\n",
       "        l01_2 = x01 * x01 + y01 * y01;\n",
       "\n",
       "    // Is the radius negative? Error.\n",
       "    if (r < 0) throw new Error(\"negative radius: \" + r);\n",
       "\n",
       "    // Is this path empty? Move to (x1,y1).\n",
       "    if (this._x1 === null) {\n",
       "      this._ += \"M\" + (this._x1 = x1) + \",\" + (this._y1 = y1);\n",
       "    }\n",
       "\n",
       "    // Or, is (x1,y1) coincident with (x0,y0)? Do nothing.\n",
       "    else if (!(l01_2 > epsilon));\n",
       "\n",
       "    // Or, are (x0,y0), (x1,y1) and (x2,y2) collinear?\n",
       "    // Equivalently, is (x1,y1) coincident with (x2,y2)?\n",
       "    // Or, is the radius zero? Line to (x1,y1).\n",
       "    else if (!(Math.abs(y01 * x21 - y21 * x01) > epsilon) || !r) {\n",
       "      this._ += \"L\" + (this._x1 = x1) + \",\" + (this._y1 = y1);\n",
       "    }\n",
       "\n",
       "    // Otherwise, draw an arc!\n",
       "    else {\n",
       "      var x20 = x2 - x0,\n",
       "          y20 = y2 - y0,\n",
       "          l21_2 = x21 * x21 + y21 * y21,\n",
       "          l20_2 = x20 * x20 + y20 * y20,\n",
       "          l21 = Math.sqrt(l21_2),\n",
       "          l01 = Math.sqrt(l01_2),\n",
       "          l = r * Math.tan((pi - Math.acos((l21_2 + l01_2 - l20_2) / (2 * l21 * l01))) / 2),\n",
       "          t01 = l / l01,\n",
       "          t21 = l / l21;\n",
       "\n",
       "      // If the start tangent is not coincident with (x0,y0), line to.\n",
       "      if (Math.abs(t01 - 1) > epsilon) {\n",
       "        this._ += \"L\" + (x1 + t01 * x01) + \",\" + (y1 + t01 * y01);\n",
       "      }\n",
       "\n",
       "      this._ += \"A\" + r + \",\" + r + \",0,0,\" + (+(y01 * x20 > x01 * y20)) + \",\" + (this._x1 = x1 + t21 * x21) + \",\" + (this._y1 = y1 + t21 * y21);\n",
       "    }\n",
       "  },\n",
       "  arc: function(x, y, r, a0, a1, ccw) {\n",
       "    x = +x, y = +y, r = +r, ccw = !!ccw;\n",
       "    var dx = r * Math.cos(a0),\n",
       "        dy = r * Math.sin(a0),\n",
       "        x0 = x + dx,\n",
       "        y0 = y + dy,\n",
       "        cw = 1 ^ ccw,\n",
       "        da = ccw ? a0 - a1 : a1 - a0;\n",
       "\n",
       "    // Is the radius negative? Error.\n",
       "    if (r < 0) throw new Error(\"negative radius: \" + r);\n",
       "\n",
       "    // Is this path empty? Move to (x0,y0).\n",
       "    if (this._x1 === null) {\n",
       "      this._ += \"M\" + x0 + \",\" + y0;\n",
       "    }\n",
       "\n",
       "    // Or, is (x0,y0) not coincident with the previous point? Line to (x0,y0).\n",
       "    else if (Math.abs(this._x1 - x0) > epsilon || Math.abs(this._y1 - y0) > epsilon) {\n",
       "      this._ += \"L\" + x0 + \",\" + y0;\n",
       "    }\n",
       "\n",
       "    // Is this arc empty? We're done.\n",
       "    if (!r) return;\n",
       "\n",
       "    // Does the angle go the wrong way? Flip the direction.\n",
       "    if (da < 0) da = da % tau + tau;\n",
       "\n",
       "    // Is this a complete circle? Draw two arcs to complete the circle.\n",
       "    if (da > tauEpsilon) {\n",
       "      this._ += \"A\" + r + \",\" + r + \",0,1,\" + cw + \",\" + (x - dx) + \",\" + (y - dy) + \"A\" + r + \",\" + r + \",0,1,\" + cw + \",\" + (this._x1 = x0) + \",\" + (this._y1 = y0);\n",
       "    }\n",
       "\n",
       "    // Is this arc non-empty? Draw an arc!\n",
       "    else if (da > epsilon) {\n",
       "      this._ += \"A\" + r + \",\" + r + \",0,\" + (+(da >= pi)) + \",\" + cw + \",\" + (this._x1 = x + r * Math.cos(a1)) + \",\" + (this._y1 = y + r * Math.sin(a1));\n",
       "    }\n",
       "  },\n",
       "  rect: function(x, y, w, h) {\n",
       "    this._ += \"M\" + (this._x0 = this._x1 = +x) + \",\" + (this._y0 = this._y1 = +y) + \"h\" + (+w) + \"v\" + (+h) + \"h\" + (-w) + \"Z\";\n",
       "  },\n",
       "  toString: function() {\n",
       "    return this._;\n",
       "  }\n",
       "};\n",
       "\n",
       "exports.path = path;\n",
       "\n",
       "Object.defineProperty(exports, '__esModule', { value: true });\n",
       "\n",
       "}));\n",
       "\n",
       "},{}],10:[function(require,module,exports){\n",
       "// https://d3js.org/d3-scale/ v3.2.1 Copyright 2019 Mike Bostock\n",
       "(function (global, factory) {\n",
       "typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-array'), require('d3-interpolate'), require('d3-format'), require('d3-time'), require('d3-time-format')) :\n",
       "typeof define === 'function' && define.amd ? define(['exports', 'd3-array', 'd3-interpolate', 'd3-format', 'd3-time', 'd3-time-format'], factory) :\n",
       "(global = global || self, factory(global.d3 = global.d3 || {}, global.d3, global.d3, global.d3, global.d3, global.d3));\n",
       "}(this, function (exports, d3Array, d3Interpolate, d3Format, d3Time, d3TimeFormat) { 'use strict';\n",
       "\n",
       "function initRange(domain, range) {\n",
       "  switch (arguments.length) {\n",
       "    case 0: break;\n",
       "    case 1: this.range(domain); break;\n",
       "    default: this.range(range).domain(domain); break;\n",
       "  }\n",
       "  return this;\n",
       "}\n",
       "\n",
       "function initInterpolator(domain, interpolator) {\n",
       "  switch (arguments.length) {\n",
       "    case 0: break;\n",
       "    case 1: {\n",
       "      if (typeof domain === \"function\") this.interpolator(domain);\n",
       "      else this.range(domain);\n",
       "      break;\n",
       "    }\n",
       "    default: {\n",
       "      this.domain(domain);\n",
       "      if (typeof interpolator === \"function\") this.interpolator(interpolator);\n",
       "      else this.range(interpolator);\n",
       "      break;\n",
       "    }\n",
       "  }\n",
       "  return this;\n",
       "}\n",
       "\n",
       "const implicit = Symbol(\"implicit\");\n",
       "\n",
       "function ordinal() {\n",
       "  var index = new Map(),\n",
       "      domain = [],\n",
       "      range = [],\n",
       "      unknown = implicit;\n",
       "\n",
       "  function scale(d) {\n",
       "    var key = d + \"\", i = index.get(key);\n",
       "    if (!i) {\n",
       "      if (unknown !== implicit) return unknown;\n",
       "      index.set(key, i = domain.push(d));\n",
       "    }\n",
       "    return range[(i - 1) % range.length];\n",
       "  }\n",
       "\n",
       "  scale.domain = function(_) {\n",
       "    if (!arguments.length) return domain.slice();\n",
       "    domain = [], index = new Map();\n",
       "    for (const value of _) {\n",
       "      const key = value + \"\";\n",
       "      if (index.has(key)) continue;\n",
       "      index.set(key, domain.push(value));\n",
       "    }\n",
       "    return scale;\n",
       "  };\n",
       "\n",
       "  scale.range = function(_) {\n",
       "    return arguments.length ? (range = Array.from(_), scale) : range.slice();\n",
       "  };\n",
       "\n",
       "  scale.unknown = function(_) {\n",
       "    return arguments.length ? (unknown = _, scale) : unknown;\n",
       "  };\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return ordinal(domain, range).unknown(unknown);\n",
       "  };\n",
       "\n",
       "  initRange.apply(scale, arguments);\n",
       "\n",
       "  return scale;\n",
       "}\n",
       "\n",
       "function band() {\n",
       "  var scale = ordinal().unknown(undefined),\n",
       "      domain = scale.domain,\n",
       "      ordinalRange = scale.range,\n",
       "      r0 = 0,\n",
       "      r1 = 1,\n",
       "      step,\n",
       "      bandwidth,\n",
       "      round = false,\n",
       "      paddingInner = 0,\n",
       "      paddingOuter = 0,\n",
       "      align = 0.5;\n",
       "\n",
       "  delete scale.unknown;\n",
       "\n",
       "  function rescale() {\n",
       "    var n = domain().length,\n",
       "        reverse = r1 < r0,\n",
       "        start = reverse ? r1 : r0,\n",
       "        stop = reverse ? r0 : r1;\n",
       "    step = (stop - start) / Math.max(1, n - paddingInner + paddingOuter * 2);\n",
       "    if (round) step = Math.floor(step);\n",
       "    start += (stop - start - step * (n - paddingInner)) * align;\n",
       "    bandwidth = step * (1 - paddingInner);\n",
       "    if (round) start = Math.round(start), bandwidth = Math.round(bandwidth);\n",
       "    var values = d3Array.range(n).map(function(i) { return start + step * i; });\n",
       "    return ordinalRange(reverse ? values.reverse() : values);\n",
       "  }\n",
       "\n",
       "  scale.domain = function(_) {\n",
       "    return arguments.length ? (domain(_), rescale()) : domain();\n",
       "  };\n",
       "\n",
       "  scale.range = function(_) {\n",
       "    return arguments.length ? ([r0, r1] = _, r0 = +r0, r1 = +r1, rescale()) : [r0, r1];\n",
       "  };\n",
       "\n",
       "  scale.rangeRound = function(_) {\n",
       "    return [r0, r1] = _, r0 = +r0, r1 = +r1, round = true, rescale();\n",
       "  };\n",
       "\n",
       "  scale.bandwidth = function() {\n",
       "    return bandwidth;\n",
       "  };\n",
       "\n",
       "  scale.step = function() {\n",
       "    return step;\n",
       "  };\n",
       "\n",
       "  scale.round = function(_) {\n",
       "    return arguments.length ? (round = !!_, rescale()) : round;\n",
       "  };\n",
       "\n",
       "  scale.padding = function(_) {\n",
       "    return arguments.length ? (paddingInner = Math.min(1, paddingOuter = +_), rescale()) : paddingInner;\n",
       "  };\n",
       "\n",
       "  scale.paddingInner = function(_) {\n",
       "    return arguments.length ? (paddingInner = Math.min(1, _), rescale()) : paddingInner;\n",
       "  };\n",
       "\n",
       "  scale.paddingOuter = function(_) {\n",
       "    return arguments.length ? (paddingOuter = +_, rescale()) : paddingOuter;\n",
       "  };\n",
       "\n",
       "  scale.align = function(_) {\n",
       "    return arguments.length ? (align = Math.max(0, Math.min(1, _)), rescale()) : align;\n",
       "  };\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return band(domain(), [r0, r1])\n",
       "        .round(round)\n",
       "        .paddingInner(paddingInner)\n",
       "        .paddingOuter(paddingOuter)\n",
       "        .align(align);\n",
       "  };\n",
       "\n",
       "  return initRange.apply(rescale(), arguments);\n",
       "}\n",
       "\n",
       "function pointish(scale) {\n",
       "  var copy = scale.copy;\n",
       "\n",
       "  scale.padding = scale.paddingOuter;\n",
       "  delete scale.paddingInner;\n",
       "  delete scale.paddingOuter;\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return pointish(copy());\n",
       "  };\n",
       "\n",
       "  return scale;\n",
       "}\n",
       "\n",
       "function point() {\n",
       "  return pointish(band.apply(null, arguments).paddingInner(1));\n",
       "}\n",
       "\n",
       "function constant(x) {\n",
       "  return function() {\n",
       "    return x;\n",
       "  };\n",
       "}\n",
       "\n",
       "function number(x) {\n",
       "  return +x;\n",
       "}\n",
       "\n",
       "var unit = [0, 1];\n",
       "\n",
       "function identity(x) {\n",
       "  return x;\n",
       "}\n",
       "\n",
       "function normalize(a, b) {\n",
       "  return (b -= (a = +a))\n",
       "      ? function(x) { return (x - a) / b; }\n",
       "      : constant(isNaN(b) ? NaN : 0.5);\n",
       "}\n",
       "\n",
       "function clamper(a, b) {\n",
       "  var t;\n",
       "  if (a > b) t = a, a = b, b = t;\n",
       "  return function(x) { return Math.max(a, Math.min(b, x)); };\n",
       "}\n",
       "\n",
       "// normalize(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].\n",
       "// interpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding range value x in [a,b].\n",
       "function bimap(domain, range, interpolate) {\n",
       "  var d0 = domain[0], d1 = domain[1], r0 = range[0], r1 = range[1];\n",
       "  if (d1 < d0) d0 = normalize(d1, d0), r0 = interpolate(r1, r0);\n",
       "  else d0 = normalize(d0, d1), r0 = interpolate(r0, r1);\n",
       "  return function(x) { return r0(d0(x)); };\n",
       "}\n",
       "\n",
       "function polymap(domain, range, interpolate) {\n",
       "  var j = Math.min(domain.length, range.length) - 1,\n",
       "      d = new Array(j),\n",
       "      r = new Array(j),\n",
       "      i = -1;\n",
       "\n",
       "  // Reverse descending domains.\n",
       "  if (domain[j] < domain[0]) {\n",
       "    domain = domain.slice().reverse();\n",
       "    range = range.slice().reverse();\n",
       "  }\n",
       "\n",
       "  while (++i < j) {\n",
       "    d[i] = normalize(domain[i], domain[i + 1]);\n",
       "    r[i] = interpolate(range[i], range[i + 1]);\n",
       "  }\n",
       "\n",
       "  return function(x) {\n",
       "    var i = d3Array.bisect(domain, x, 1, j) - 1;\n",
       "    return r[i](d[i](x));\n",
       "  };\n",
       "}\n",
       "\n",
       "function copy(source, target) {\n",
       "  return target\n",
       "      .domain(source.domain())\n",
       "      .range(source.range())\n",
       "      .interpolate(source.interpolate())\n",
       "      .clamp(source.clamp())\n",
       "      .unknown(source.unknown());\n",
       "}\n",
       "\n",
       "function transformer() {\n",
       "  var domain = unit,\n",
       "      range = unit,\n",
       "      interpolate = d3Interpolate.interpolate,\n",
       "      transform,\n",
       "      untransform,\n",
       "      unknown,\n",
       "      clamp = identity,\n",
       "      piecewise,\n",
       "      output,\n",
       "      input;\n",
       "\n",
       "  function rescale() {\n",
       "    var n = Math.min(domain.length, range.length);\n",
       "    if (clamp !== identity) clamp = clamper(domain[0], domain[n - 1]);\n",
       "    piecewise = n > 2 ? polymap : bimap;\n",
       "    output = input = null;\n",
       "    return scale;\n",
       "  }\n",
       "\n",
       "  function scale(x) {\n",
       "    return isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate)))(transform(clamp(x)));\n",
       "  }\n",
       "\n",
       "  scale.invert = function(y) {\n",
       "    return clamp(untransform((input || (input = piecewise(range, domain.map(transform), d3Interpolate.interpolateNumber)))(y)));\n",
       "  };\n",
       "\n",
       "  scale.domain = function(_) {\n",
       "    return arguments.length ? (domain = Array.from(_, number), rescale()) : domain.slice();\n",
       "  };\n",
       "\n",
       "  scale.range = function(_) {\n",
       "    return arguments.length ? (range = Array.from(_), rescale()) : range.slice();\n",
       "  };\n",
       "\n",
       "  scale.rangeRound = function(_) {\n",
       "    return range = Array.from(_), interpolate = d3Interpolate.interpolateRound, rescale();\n",
       "  };\n",
       "\n",
       "  scale.clamp = function(_) {\n",
       "    return arguments.length ? (clamp = _ ? true : identity, rescale()) : clamp !== identity;\n",
       "  };\n",
       "\n",
       "  scale.interpolate = function(_) {\n",
       "    return arguments.length ? (interpolate = _, rescale()) : interpolate;\n",
       "  };\n",
       "\n",
       "  scale.unknown = function(_) {\n",
       "    return arguments.length ? (unknown = _, scale) : unknown;\n",
       "  };\n",
       "\n",
       "  return function(t, u) {\n",
       "    transform = t, untransform = u;\n",
       "    return rescale();\n",
       "  };\n",
       "}\n",
       "\n",
       "function continuous() {\n",
       "  return transformer()(identity, identity);\n",
       "}\n",
       "\n",
       "function tickFormat(start, stop, count, specifier) {\n",
       "  var step = d3Array.tickStep(start, stop, count),\n",
       "      precision;\n",
       "  specifier = d3Format.formatSpecifier(specifier == null ? \",f\" : specifier);\n",
       "  switch (specifier.type) {\n",
       "    case \"s\": {\n",
       "      var value = Math.max(Math.abs(start), Math.abs(stop));\n",
       "      if (specifier.precision == null && !isNaN(precision = d3Format.precisionPrefix(step, value))) specifier.precision = precision;\n",
       "      return d3Format.formatPrefix(specifier, value);\n",
       "    }\n",
       "    case \"\":\n",
       "    case \"e\":\n",
       "    case \"g\":\n",
       "    case \"p\":\n",
       "    case \"r\": {\n",
       "      if (specifier.precision == null && !isNaN(precision = d3Format.precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === \"e\");\n",
       "      break;\n",
       "    }\n",
       "    case \"f\":\n",
       "    case \"%\": {\n",
       "      if (specifier.precision == null && !isNaN(precision = d3Format.precisionFixed(step))) specifier.precision = precision - (specifier.type === \"%\") * 2;\n",
       "      break;\n",
       "    }\n",
       "  }\n",
       "  return d3Format.format(specifier);\n",
       "}\n",
       "\n",
       "function linearish(scale) {\n",
       "  var domain = scale.domain;\n",
       "\n",
       "  scale.ticks = function(count) {\n",
       "    var d = domain();\n",
       "    return d3Array.ticks(d[0], d[d.length - 1], count == null ? 10 : count);\n",
       "  };\n",
       "\n",
       "  scale.tickFormat = function(count, specifier) {\n",
       "    var d = domain();\n",
       "    return tickFormat(d[0], d[d.length - 1], count == null ? 10 : count, specifier);\n",
       "  };\n",
       "\n",
       "  scale.nice = function(count) {\n",
       "    if (count == null) count = 10;\n",
       "\n",
       "    var d = domain(),\n",
       "        i0 = 0,\n",
       "        i1 = d.length - 1,\n",
       "        start = d[i0],\n",
       "        stop = d[i1],\n",
       "        step;\n",
       "\n",
       "    if (stop < start) {\n",
       "      step = start, start = stop, stop = step;\n",
       "      step = i0, i0 = i1, i1 = step;\n",
       "    }\n",
       "\n",
       "    step = d3Array.tickIncrement(start, stop, count);\n",
       "\n",
       "    if (step > 0) {\n",
       "      start = Math.floor(start / step) * step;\n",
       "      stop = Math.ceil(stop / step) * step;\n",
       "      step = d3Array.tickIncrement(start, stop, count);\n",
       "    } else if (step < 0) {\n",
       "      start = Math.ceil(start * step) / step;\n",
       "      stop = Math.floor(stop * step) / step;\n",
       "      step = d3Array.tickIncrement(start, stop, count);\n",
       "    }\n",
       "\n",
       "    if (step > 0) {\n",
       "      d[i0] = Math.floor(start / step) * step;\n",
       "      d[i1] = Math.ceil(stop / step) * step;\n",
       "      domain(d);\n",
       "    } else if (step < 0) {\n",
       "      d[i0] = Math.ceil(start * step) / step;\n",
       "      d[i1] = Math.floor(stop * step) / step;\n",
       "      domain(d);\n",
       "    }\n",
       "\n",
       "    return scale;\n",
       "  };\n",
       "\n",
       "  return scale;\n",
       "}\n",
       "\n",
       "function linear() {\n",
       "  var scale = continuous();\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return copy(scale, linear());\n",
       "  };\n",
       "\n",
       "  initRange.apply(scale, arguments);\n",
       "\n",
       "  return linearish(scale);\n",
       "}\n",
       "\n",
       "function identity$1(domain) {\n",
       "  var unknown;\n",
       "\n",
       "  function scale(x) {\n",
       "    return isNaN(x = +x) ? unknown : x;\n",
       "  }\n",
       "\n",
       "  scale.invert = scale;\n",
       "\n",
       "  scale.domain = scale.range = function(_) {\n",
       "    return arguments.length ? (domain = Array.from(_, number), scale) : domain.slice();\n",
       "  };\n",
       "\n",
       "  scale.unknown = function(_) {\n",
       "    return arguments.length ? (unknown = _, scale) : unknown;\n",
       "  };\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return identity$1(domain).unknown(unknown);\n",
       "  };\n",
       "\n",
       "  domain = arguments.length ? Array.from(domain, number) : [0, 1];\n",
       "\n",
       "  return linearish(scale);\n",
       "}\n",
       "\n",
       "function nice(domain, interval) {\n",
       "  domain = domain.slice();\n",
       "\n",
       "  var i0 = 0,\n",
       "      i1 = domain.length - 1,\n",
       "      x0 = domain[i0],\n",
       "      x1 = domain[i1],\n",
       "      t;\n",
       "\n",
       "  if (x1 < x0) {\n",
       "    t = i0, i0 = i1, i1 = t;\n",
       "    t = x0, x0 = x1, x1 = t;\n",
       "  }\n",
       "\n",
       "  domain[i0] = interval.floor(x0);\n",
       "  domain[i1] = interval.ceil(x1);\n",
       "  return domain;\n",
       "}\n",
       "\n",
       "function transformLog(x) {\n",
       "  return Math.log(x);\n",
       "}\n",
       "\n",
       "function transformExp(x) {\n",
       "  return Math.exp(x);\n",
       "}\n",
       "\n",
       "function transformLogn(x) {\n",
       "  return -Math.log(-x);\n",
       "}\n",
       "\n",
       "function transformExpn(x) {\n",
       "  return -Math.exp(-x);\n",
       "}\n",
       "\n",
       "function pow10(x) {\n",
       "  return isFinite(x) ? +(\"1e\" + x) : x < 0 ? 0 : x;\n",
       "}\n",
       "\n",
       "function powp(base) {\n",
       "  return base === 10 ? pow10\n",
       "      : base === Math.E ? Math.exp\n",
       "      : function(x) { return Math.pow(base, x); };\n",
       "}\n",
       "\n",
       "function logp(base) {\n",
       "  return base === Math.E ? Math.log\n",
       "      : base === 10 && Math.log10\n",
       "      || base === 2 && Math.log2\n",
       "      || (base = Math.log(base), function(x) { return Math.log(x) / base; });\n",
       "}\n",
       "\n",
       "function reflect(f) {\n",
       "  return function(x) {\n",
       "    return -f(-x);\n",
       "  };\n",
       "}\n",
       "\n",
       "function loggish(transform) {\n",
       "  var scale = transform(transformLog, transformExp),\n",
       "      domain = scale.domain,\n",
       "      base = 10,\n",
       "      logs,\n",
       "      pows;\n",
       "\n",
       "  function rescale() {\n",
       "    logs = logp(base), pows = powp(base);\n",
       "    if (domain()[0] < 0) {\n",
       "      logs = reflect(logs), pows = reflect(pows);\n",
       "      transform(transformLogn, transformExpn);\n",
       "    } else {\n",
       "      transform(transformLog, transformExp);\n",
       "    }\n",
       "    return scale;\n",
       "  }\n",
       "\n",
       "  scale.base = function(_) {\n",
       "    return arguments.length ? (base = +_, rescale()) : base;\n",
       "  };\n",
       "\n",
       "  scale.domain = function(_) {\n",
       "    return arguments.length ? (domain(_), rescale()) : domain();\n",
       "  };\n",
       "\n",
       "  scale.ticks = function(count) {\n",
       "    var d = domain(),\n",
       "        u = d[0],\n",
       "        v = d[d.length - 1],\n",
       "        r;\n",
       "\n",
       "    if (r = v < u) i = u, u = v, v = i;\n",
       "\n",
       "    var i = logs(u),\n",
       "        j = logs(v),\n",
       "        p,\n",
       "        k,\n",
       "        t,\n",
       "        n = count == null ? 10 : +count,\n",
       "        z = [];\n",
       "\n",
       "    if (!(base % 1) && j - i < n) {\n",
       "      i = Math.floor(i), j = Math.ceil(j);\n",
       "      if (u > 0) for (; i <= j; ++i) {\n",
       "        for (k = 1, p = pows(i); k < base; ++k) {\n",
       "          t = p * k;\n",
       "          if (t < u) continue;\n",
       "          if (t > v) break;\n",
       "          z.push(t);\n",
       "        }\n",
       "      } else for (; i <= j; ++i) {\n",
       "        for (k = base - 1, p = pows(i); k >= 1; --k) {\n",
       "          t = p * k;\n",
       "          if (t < u) continue;\n",
       "          if (t > v) break;\n",
       "          z.push(t);\n",
       "        }\n",
       "      }\n",
       "      if (z.length * 2 < n) z = d3Array.ticks(u, v, n);\n",
       "    } else {\n",
       "      z = d3Array.ticks(i, j, Math.min(j - i, n)).map(pows);\n",
       "    }\n",
       "\n",
       "    return r ? z.reverse() : z;\n",
       "  };\n",
       "\n",
       "  scale.tickFormat = function(count, specifier) {\n",
       "    if (specifier == null) specifier = base === 10 ? \".0e\" : \",\";\n",
       "    if (typeof specifier !== \"function\") specifier = d3Format.format(specifier);\n",
       "    if (count === Infinity) return specifier;\n",
       "    if (count == null) count = 10;\n",
       "    var k = Math.max(1, base * count / scale.ticks().length); // TODO fast estimate?\n",
       "    return function(d) {\n",
       "      var i = d / pows(Math.round(logs(d)));\n",
       "      if (i * base < base - 0.5) i *= base;\n",
       "      return i <= k ? specifier(d) : \"\";\n",
       "    };\n",
       "  };\n",
       "\n",
       "  scale.nice = function() {\n",
       "    return domain(nice(domain(), {\n",
       "      floor: function(x) { return pows(Math.floor(logs(x))); },\n",
       "      ceil: function(x) { return pows(Math.ceil(logs(x))); }\n",
       "    }));\n",
       "  };\n",
       "\n",
       "  return scale;\n",
       "}\n",
       "\n",
       "function log() {\n",
       "  var scale = loggish(transformer()).domain([1, 10]);\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return copy(scale, log()).base(scale.base());\n",
       "  };\n",
       "\n",
       "  initRange.apply(scale, arguments);\n",
       "\n",
       "  return scale;\n",
       "}\n",
       "\n",
       "function transformSymlog(c) {\n",
       "  return function(x) {\n",
       "    return Math.sign(x) * Math.log1p(Math.abs(x / c));\n",
       "  };\n",
       "}\n",
       "\n",
       "function transformSymexp(c) {\n",
       "  return function(x) {\n",
       "    return Math.sign(x) * Math.expm1(Math.abs(x)) * c;\n",
       "  };\n",
       "}\n",
       "\n",
       "function symlogish(transform) {\n",
       "  var c = 1, scale = transform(transformSymlog(c), transformSymexp(c));\n",
       "\n",
       "  scale.constant = function(_) {\n",
       "    return arguments.length ? transform(transformSymlog(c = +_), transformSymexp(c)) : c;\n",
       "  };\n",
       "\n",
       "  return linearish(scale);\n",
       "}\n",
       "\n",
       "function symlog() {\n",
       "  var scale = symlogish(transformer());\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return copy(scale, symlog()).constant(scale.constant());\n",
       "  };\n",
       "\n",
       "  return initRange.apply(scale, arguments);\n",
       "}\n",
       "\n",
       "function transformPow(exponent) {\n",
       "  return function(x) {\n",
       "    return x < 0 ? -Math.pow(-x, exponent) : Math.pow(x, exponent);\n",
       "  };\n",
       "}\n",
       "\n",
       "function transformSqrt(x) {\n",
       "  return x < 0 ? -Math.sqrt(-x) : Math.sqrt(x);\n",
       "}\n",
       "\n",
       "function transformSquare(x) {\n",
       "  return x < 0 ? -x * x : x * x;\n",
       "}\n",
       "\n",
       "function powish(transform) {\n",
       "  var scale = transform(identity, identity),\n",
       "      exponent = 1;\n",
       "\n",
       "  function rescale() {\n",
       "    return exponent === 1 ? transform(identity, identity)\n",
       "        : exponent === 0.5 ? transform(transformSqrt, transformSquare)\n",
       "        : transform(transformPow(exponent), transformPow(1 / exponent));\n",
       "  }\n",
       "\n",
       "  scale.exponent = function(_) {\n",
       "    return arguments.length ? (exponent = +_, rescale()) : exponent;\n",
       "  };\n",
       "\n",
       "  return linearish(scale);\n",
       "}\n",
       "\n",
       "function pow() {\n",
       "  var scale = powish(transformer());\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return copy(scale, pow()).exponent(scale.exponent());\n",
       "  };\n",
       "\n",
       "  initRange.apply(scale, arguments);\n",
       "\n",
       "  return scale;\n",
       "}\n",
       "\n",
       "function sqrt() {\n",
       "  return pow.apply(null, arguments).exponent(0.5);\n",
       "}\n",
       "\n",
       "function square(x) {\n",
       "  return Math.sign(x) * x * x;\n",
       "}\n",
       "\n",
       "function unsquare(x) {\n",
       "  return Math.sign(x) * Math.sqrt(Math.abs(x));\n",
       "}\n",
       "\n",
       "function radial() {\n",
       "  var squared = continuous(),\n",
       "      range = [0, 1],\n",
       "      round = false,\n",
       "      unknown;\n",
       "\n",
       "  function scale(x) {\n",
       "    var y = unsquare(squared(x));\n",
       "    return isNaN(y) ? unknown : round ? Math.round(y) : y;\n",
       "  }\n",
       "\n",
       "  scale.invert = function(y) {\n",
       "    return squared.invert(square(y));\n",
       "  };\n",
       "\n",
       "  scale.domain = function(_) {\n",
       "    return arguments.length ? (squared.domain(_), scale) : squared.domain();\n",
       "  };\n",
       "\n",
       "  scale.range = function(_) {\n",
       "    return arguments.length ? (squared.range((range = Array.from(_, number)).map(square)), scale) : range.slice();\n",
       "  };\n",
       "\n",
       "  scale.rangeRound = function(_) {\n",
       "    return scale.range(_).round(true);\n",
       "  };\n",
       "\n",
       "  scale.round = function(_) {\n",
       "    return arguments.length ? (round = !!_, scale) : round;\n",
       "  };\n",
       "\n",
       "  scale.clamp = function(_) {\n",
       "    return arguments.length ? (squared.clamp(_), scale) : squared.clamp();\n",
       "  };\n",
       "\n",
       "  scale.unknown = function(_) {\n",
       "    return arguments.length ? (unknown = _, scale) : unknown;\n",
       "  };\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return radial(squared.domain(), range)\n",
       "        .round(round)\n",
       "        .clamp(squared.clamp())\n",
       "        .unknown(unknown);\n",
       "  };\n",
       "\n",
       "  initRange.apply(scale, arguments);\n",
       "\n",
       "  return linearish(scale);\n",
       "}\n",
       "\n",
       "function quantile() {\n",
       "  var domain = [],\n",
       "      range = [],\n",
       "      thresholds = [],\n",
       "      unknown;\n",
       "\n",
       "  function rescale() {\n",
       "    var i = 0, n = Math.max(1, range.length);\n",
       "    thresholds = new Array(n - 1);\n",
       "    while (++i < n) thresholds[i - 1] = d3Array.quantile(domain, i / n);\n",
       "    return scale;\n",
       "  }\n",
       "\n",
       "  function scale(x) {\n",
       "    return isNaN(x = +x) ? unknown : range[d3Array.bisect(thresholds, x)];\n",
       "  }\n",
       "\n",
       "  scale.invertExtent = function(y) {\n",
       "    var i = range.indexOf(y);\n",
       "    return i < 0 ? [NaN, NaN] : [\n",
       "      i > 0 ? thresholds[i - 1] : domain[0],\n",
       "      i < thresholds.length ? thresholds[i] : domain[domain.length - 1]\n",
       "    ];\n",
       "  };\n",
       "\n",
       "  scale.domain = function(_) {\n",
       "    if (!arguments.length) return domain.slice();\n",
       "    domain = [];\n",
       "    for (let d of _) if (d != null && !isNaN(d = +d)) domain.push(d);\n",
       "    domain.sort(d3Array.ascending);\n",
       "    return rescale();\n",
       "  };\n",
       "\n",
       "  scale.range = function(_) {\n",
       "    return arguments.length ? (range = Array.from(_), rescale()) : range.slice();\n",
       "  };\n",
       "\n",
       "  scale.unknown = function(_) {\n",
       "    return arguments.length ? (unknown = _, scale) : unknown;\n",
       "  };\n",
       "\n",
       "  scale.quantiles = function() {\n",
       "    return thresholds.slice();\n",
       "  };\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return quantile()\n",
       "        .domain(domain)\n",
       "        .range(range)\n",
       "        .unknown(unknown);\n",
       "  };\n",
       "\n",
       "  return initRange.apply(scale, arguments);\n",
       "}\n",
       "\n",
       "function quantize() {\n",
       "  var x0 = 0,\n",
       "      x1 = 1,\n",
       "      n = 1,\n",
       "      domain = [0.5],\n",
       "      range = [0, 1],\n",
       "      unknown;\n",
       "\n",
       "  function scale(x) {\n",
       "    return x <= x ? range[d3Array.bisect(domain, x, 0, n)] : unknown;\n",
       "  }\n",
       "\n",
       "  function rescale() {\n",
       "    var i = -1;\n",
       "    domain = new Array(n);\n",
       "    while (++i < n) domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);\n",
       "    return scale;\n",
       "  }\n",
       "\n",
       "  scale.domain = function(_) {\n",
       "    return arguments.length ? ([x0, x1] = _, x0 = +x0, x1 = +x1, rescale()) : [x0, x1];\n",
       "  };\n",
       "\n",
       "  scale.range = function(_) {\n",
       "    return arguments.length ? (n = (range = Array.from(_)).length - 1, rescale()) : range.slice();\n",
       "  };\n",
       "\n",
       "  scale.invertExtent = function(y) {\n",
       "    var i = range.indexOf(y);\n",
       "    return i < 0 ? [NaN, NaN]\n",
       "        : i < 1 ? [x0, domain[0]]\n",
       "        : i >= n ? [domain[n - 1], x1]\n",
       "        : [domain[i - 1], domain[i]];\n",
       "  };\n",
       "\n",
       "  scale.unknown = function(_) {\n",
       "    return arguments.length ? (unknown = _, scale) : scale;\n",
       "  };\n",
       "\n",
       "  scale.thresholds = function() {\n",
       "    return domain.slice();\n",
       "  };\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return quantize()\n",
       "        .domain([x0, x1])\n",
       "        .range(range)\n",
       "        .unknown(unknown);\n",
       "  };\n",
       "\n",
       "  return initRange.apply(linearish(scale), arguments);\n",
       "}\n",
       "\n",
       "function threshold() {\n",
       "  var domain = [0.5],\n",
       "      range = [0, 1],\n",
       "      unknown,\n",
       "      n = 1;\n",
       "\n",
       "  function scale(x) {\n",
       "    return x <= x ? range[d3Array.bisect(domain, x, 0, n)] : unknown;\n",
       "  }\n",
       "\n",
       "  scale.domain = function(_) {\n",
       "    return arguments.length ? (domain = Array.from(_), n = Math.min(domain.length, range.length - 1), scale) : domain.slice();\n",
       "  };\n",
       "\n",
       "  scale.range = function(_) {\n",
       "    return arguments.length ? (range = Array.from(_), n = Math.min(domain.length, range.length - 1), scale) : range.slice();\n",
       "  };\n",
       "\n",
       "  scale.invertExtent = function(y) {\n",
       "    var i = range.indexOf(y);\n",
       "    return [domain[i - 1], domain[i]];\n",
       "  };\n",
       "\n",
       "  scale.unknown = function(_) {\n",
       "    return arguments.length ? (unknown = _, scale) : unknown;\n",
       "  };\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return threshold()\n",
       "        .domain(domain)\n",
       "        .range(range)\n",
       "        .unknown(unknown);\n",
       "  };\n",
       "\n",
       "  return initRange.apply(scale, arguments);\n",
       "}\n",
       "\n",
       "var durationSecond = 1000,\n",
       "    durationMinute = durationSecond * 60,\n",
       "    durationHour = durationMinute * 60,\n",
       "    durationDay = durationHour * 24,\n",
       "    durationWeek = durationDay * 7,\n",
       "    durationMonth = durationDay * 30,\n",
       "    durationYear = durationDay * 365;\n",
       "\n",
       "function date(t) {\n",
       "  return new Date(t);\n",
       "}\n",
       "\n",
       "function number$1(t) {\n",
       "  return t instanceof Date ? +t : +new Date(+t);\n",
       "}\n",
       "\n",
       "function calendar(year, month, week, day, hour, minute, second, millisecond, format) {\n",
       "  var scale = continuous(),\n",
       "      invert = scale.invert,\n",
       "      domain = scale.domain;\n",
       "\n",
       "  var formatMillisecond = format(\".%L\"),\n",
       "      formatSecond = format(\":%S\"),\n",
       "      formatMinute = format(\"%I:%M\"),\n",
       "      formatHour = format(\"%I %p\"),\n",
       "      formatDay = format(\"%a %d\"),\n",
       "      formatWeek = format(\"%b %d\"),\n",
       "      formatMonth = format(\"%B\"),\n",
       "      formatYear = format(\"%Y\");\n",
       "\n",
       "  var tickIntervals = [\n",
       "    [second,  1,      durationSecond],\n",
       "    [second,  5,  5 * durationSecond],\n",
       "    [second, 15, 15 * durationSecond],\n",
       "    [second, 30, 30 * durationSecond],\n",
       "    [minute,  1,      durationMinute],\n",
       "    [minute,  5,  5 * durationMinute],\n",
       "    [minute, 15, 15 * durationMinute],\n",
       "    [minute, 30, 30 * durationMinute],\n",
       "    [  hour,  1,      durationHour  ],\n",
       "    [  hour,  3,  3 * durationHour  ],\n",
       "    [  hour,  6,  6 * durationHour  ],\n",
       "    [  hour, 12, 12 * durationHour  ],\n",
       "    [   day,  1,      durationDay   ],\n",
       "    [   day,  2,  2 * durationDay   ],\n",
       "    [  week,  1,      durationWeek  ],\n",
       "    [ month,  1,      durationMonth ],\n",
       "    [ month,  3,  3 * durationMonth ],\n",
       "    [  year,  1,      durationYear  ]\n",
       "  ];\n",
       "\n",
       "  function tickFormat(date) {\n",
       "    return (second(date) < date ? formatMillisecond\n",
       "        : minute(date) < date ? formatSecond\n",
       "        : hour(date) < date ? formatMinute\n",
       "        : day(date) < date ? formatHour\n",
       "        : month(date) < date ? (week(date) < date ? formatDay : formatWeek)\n",
       "        : year(date) < date ? formatMonth\n",
       "        : formatYear)(date);\n",
       "  }\n",
       "\n",
       "  function tickInterval(interval, start, stop) {\n",
       "    if (interval == null) interval = 10;\n",
       "\n",
       "    // If a desired tick count is specified, pick a reasonable tick interval\n",
       "    // based on the extent of the domain and a rough estimate of tick size.\n",
       "    // Otherwise, assume interval is already a time interval and use it.\n",
       "    if (typeof interval === \"number\") {\n",
       "      var target = Math.abs(stop - start) / interval,\n",
       "          i = d3Array.bisector(function(i) { return i[2]; }).right(tickIntervals, target),\n",
       "          step;\n",
       "      if (i === tickIntervals.length) {\n",
       "        step = d3Array.tickStep(start / durationYear, stop / durationYear, interval);\n",
       "        interval = year;\n",
       "      } else if (i) {\n",
       "        i = tickIntervals[target / tickIntervals[i - 1][2] < tickIntervals[i][2] / target ? i - 1 : i];\n",
       "        step = i[1];\n",
       "        interval = i[0];\n",
       "      } else {\n",
       "        step = Math.max(d3Array.tickStep(start, stop, interval), 1);\n",
       "        interval = millisecond;\n",
       "      }\n",
       "      return interval.every(step);\n",
       "    }\n",
       "\n",
       "    return interval;\n",
       "  }\n",
       "\n",
       "  scale.invert = function(y) {\n",
       "    return new Date(invert(y));\n",
       "  };\n",
       "\n",
       "  scale.domain = function(_) {\n",
       "    return arguments.length ? domain(Array.from(_, number$1)) : domain().map(date);\n",
       "  };\n",
       "\n",
       "  scale.ticks = function(interval) {\n",
       "    var d = domain(),\n",
       "        t0 = d[0],\n",
       "        t1 = d[d.length - 1],\n",
       "        r = t1 < t0,\n",
       "        t;\n",
       "    if (r) t = t0, t0 = t1, t1 = t;\n",
       "    t = tickInterval(interval, t0, t1);\n",
       "    t = t ? t.range(t0, t1 + 1) : []; // inclusive stop\n",
       "    return r ? t.reverse() : t;\n",
       "  };\n",
       "\n",
       "  scale.tickFormat = function(count, specifier) {\n",
       "    return specifier == null ? tickFormat : format(specifier);\n",
       "  };\n",
       "\n",
       "  scale.nice = function(interval) {\n",
       "    var d = domain();\n",
       "    return (interval = tickInterval(interval, d[0], d[d.length - 1]))\n",
       "        ? domain(nice(d, interval))\n",
       "        : scale;\n",
       "  };\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return copy(scale, calendar(year, month, week, day, hour, minute, second, millisecond, format));\n",
       "  };\n",
       "\n",
       "  return scale;\n",
       "}\n",
       "\n",
       "function time() {\n",
       "  return initRange.apply(calendar(d3Time.timeYear, d3Time.timeMonth, d3Time.timeWeek, d3Time.timeDay, d3Time.timeHour, d3Time.timeMinute, d3Time.timeSecond, d3Time.timeMillisecond, d3TimeFormat.timeFormat).domain([new Date(2000, 0, 1), new Date(2000, 0, 2)]), arguments);\n",
       "}\n",
       "\n",
       "function utcTime() {\n",
       "  return initRange.apply(calendar(d3Time.utcYear, d3Time.utcMonth, d3Time.utcWeek, d3Time.utcDay, d3Time.utcHour, d3Time.utcMinute, d3Time.utcSecond, d3Time.utcMillisecond, d3TimeFormat.utcFormat).domain([Date.UTC(2000, 0, 1), Date.UTC(2000, 0, 2)]), arguments);\n",
       "}\n",
       "\n",
       "function transformer$1() {\n",
       "  var x0 = 0,\n",
       "      x1 = 1,\n",
       "      t0,\n",
       "      t1,\n",
       "      k10,\n",
       "      transform,\n",
       "      interpolator = identity,\n",
       "      clamp = false,\n",
       "      unknown;\n",
       "\n",
       "  function scale(x) {\n",
       "    return isNaN(x = +x) ? unknown : interpolator(k10 === 0 ? 0.5 : (x = (transform(x) - t0) * k10, clamp ? Math.max(0, Math.min(1, x)) : x));\n",
       "  }\n",
       "\n",
       "  scale.domain = function(_) {\n",
       "    return arguments.length ? ([x0, x1] = _, t0 = transform(x0 = +x0), t1 = transform(x1 = +x1), k10 = t0 === t1 ? 0 : 1 / (t1 - t0), scale) : [x0, x1];\n",
       "  };\n",
       "\n",
       "  scale.clamp = function(_) {\n",
       "    return arguments.length ? (clamp = !!_, scale) : clamp;\n",
       "  };\n",
       "\n",
       "  scale.interpolator = function(_) {\n",
       "    return arguments.length ? (interpolator = _, scale) : interpolator;\n",
       "  };\n",
       "\n",
       "  function range(interpolate) {\n",
       "    return function(_) {\n",
       "      var r0, r1;\n",
       "      return arguments.length ? ([r0, r1] = _, interpolator = interpolate(r0, r1), scale) : [interpolator(0), interpolator(1)];\n",
       "    };\n",
       "  }\n",
       "\n",
       "  scale.range = range(d3Interpolate.interpolate);\n",
       "\n",
       "  scale.rangeRound = range(d3Interpolate.interpolateRound);\n",
       "\n",
       "  scale.unknown = function(_) {\n",
       "    return arguments.length ? (unknown = _, scale) : unknown;\n",
       "  };\n",
       "\n",
       "  return function(t) {\n",
       "    transform = t, t0 = t(x0), t1 = t(x1), k10 = t0 === t1 ? 0 : 1 / (t1 - t0);\n",
       "    return scale;\n",
       "  };\n",
       "}\n",
       "\n",
       "function copy$1(source, target) {\n",
       "  return target\n",
       "      .domain(source.domain())\n",
       "      .interpolator(source.interpolator())\n",
       "      .clamp(source.clamp())\n",
       "      .unknown(source.unknown());\n",
       "}\n",
       "\n",
       "function sequential() {\n",
       "  var scale = linearish(transformer$1()(identity));\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return copy$1(scale, sequential());\n",
       "  };\n",
       "\n",
       "  return initInterpolator.apply(scale, arguments);\n",
       "}\n",
       "\n",
       "function sequentialLog() {\n",
       "  var scale = loggish(transformer$1()).domain([1, 10]);\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return copy$1(scale, sequentialLog()).base(scale.base());\n",
       "  };\n",
       "\n",
       "  return initInterpolator.apply(scale, arguments);\n",
       "}\n",
       "\n",
       "function sequentialSymlog() {\n",
       "  var scale = symlogish(transformer$1());\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return copy$1(scale, sequentialSymlog()).constant(scale.constant());\n",
       "  };\n",
       "\n",
       "  return initInterpolator.apply(scale, arguments);\n",
       "}\n",
       "\n",
       "function sequentialPow() {\n",
       "  var scale = powish(transformer$1());\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return copy$1(scale, sequentialPow()).exponent(scale.exponent());\n",
       "  };\n",
       "\n",
       "  return initInterpolator.apply(scale, arguments);\n",
       "}\n",
       "\n",
       "function sequentialSqrt() {\n",
       "  return sequentialPow.apply(null, arguments).exponent(0.5);\n",
       "}\n",
       "\n",
       "function sequentialQuantile() {\n",
       "  var domain = [],\n",
       "      interpolator = identity;\n",
       "\n",
       "  function scale(x) {\n",
       "    if (!isNaN(x = +x)) return interpolator((d3Array.bisect(domain, x, 1) - 1) / (domain.length - 1));\n",
       "  }\n",
       "\n",
       "  scale.domain = function(_) {\n",
       "    if (!arguments.length) return domain.slice();\n",
       "    domain = [];\n",
       "    for (let d of _) if (d != null && !isNaN(d = +d)) domain.push(d);\n",
       "    domain.sort(d3Array.ascending);\n",
       "    return scale;\n",
       "  };\n",
       "\n",
       "  scale.interpolator = function(_) {\n",
       "    return arguments.length ? (interpolator = _, scale) : interpolator;\n",
       "  };\n",
       "\n",
       "  scale.range = function() {\n",
       "    return domain.map((d, i) => interpolator(i / (domain.length - 1)));\n",
       "  };\n",
       "\n",
       "  scale.quantiles = function(n) {\n",
       "    return Array.from({length: n + 1}, (_, i) => d3Array.quantile(domain, i / n));\n",
       "  };\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return sequentialQuantile(interpolator).domain(domain);\n",
       "  };\n",
       "\n",
       "  return initInterpolator.apply(scale, arguments);\n",
       "}\n",
       "\n",
       "function transformer$2() {\n",
       "  var x0 = 0,\n",
       "      x1 = 0.5,\n",
       "      x2 = 1,\n",
       "      s = 1,\n",
       "      t0,\n",
       "      t1,\n",
       "      t2,\n",
       "      k10,\n",
       "      k21,\n",
       "      interpolator = identity,\n",
       "      transform,\n",
       "      clamp = false,\n",
       "      unknown;\n",
       "\n",
       "  function scale(x) {\n",
       "    return isNaN(x = +x) ? unknown : (x = 0.5 + ((x = +transform(x)) - t1) * (s * x < s * t1 ? k10 : k21), interpolator(clamp ? Math.max(0, Math.min(1, x)) : x));\n",
       "  }\n",
       "\n",
       "  scale.domain = function(_) {\n",
       "    return arguments.length ? ([x0, x1, x2] = _, t0 = transform(x0 = +x0), t1 = transform(x1 = +x1), t2 = transform(x2 = +x2), k10 = t0 === t1 ? 0 : 0.5 / (t1 - t0), k21 = t1 === t2 ? 0 : 0.5 / (t2 - t1), s = t1 < t0 ? -1 : 1, scale) : [x0, x1, x2];\n",
       "  };\n",
       "\n",
       "  scale.clamp = function(_) {\n",
       "    return arguments.length ? (clamp = !!_, scale) : clamp;\n",
       "  };\n",
       "\n",
       "  scale.interpolator = function(_) {\n",
       "    return arguments.length ? (interpolator = _, scale) : interpolator;\n",
       "  };\n",
       "\n",
       "  function range(interpolate) {\n",
       "    return function(_) {\n",
       "      var r0, r1, r2;\n",
       "      return arguments.length ? ([r0, r1, r2] = _, interpolator = d3Interpolate.piecewise(interpolate, [r0, r1, r2]), scale) : [interpolator(0), interpolator(0.5), interpolator(1)];\n",
       "    };\n",
       "  }\n",
       "\n",
       "  scale.range = range(d3Interpolate.interpolate);\n",
       "\n",
       "  scale.rangeRound = range(d3Interpolate.interpolateRound);\n",
       "\n",
       "  scale.unknown = function(_) {\n",
       "    return arguments.length ? (unknown = _, scale) : unknown;\n",
       "  };\n",
       "\n",
       "  return function(t) {\n",
       "    transform = t, t0 = t(x0), t1 = t(x1), t2 = t(x2), k10 = t0 === t1 ? 0 : 0.5 / (t1 - t0), k21 = t1 === t2 ? 0 : 0.5 / (t2 - t1), s = t1 < t0 ? -1 : 1;\n",
       "    return scale;\n",
       "  };\n",
       "}\n",
       "\n",
       "function diverging() {\n",
       "  var scale = linearish(transformer$2()(identity));\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return copy$1(scale, diverging());\n",
       "  };\n",
       "\n",
       "  return initInterpolator.apply(scale, arguments);\n",
       "}\n",
       "\n",
       "function divergingLog() {\n",
       "  var scale = loggish(transformer$2()).domain([0.1, 1, 10]);\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return copy$1(scale, divergingLog()).base(scale.base());\n",
       "  };\n",
       "\n",
       "  return initInterpolator.apply(scale, arguments);\n",
       "}\n",
       "\n",
       "function divergingSymlog() {\n",
       "  var scale = symlogish(transformer$2());\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return copy$1(scale, divergingSymlog()).constant(scale.constant());\n",
       "  };\n",
       "\n",
       "  return initInterpolator.apply(scale, arguments);\n",
       "}\n",
       "\n",
       "function divergingPow() {\n",
       "  var scale = powish(transformer$2());\n",
       "\n",
       "  scale.copy = function() {\n",
       "    return copy$1(scale, divergingPow()).exponent(scale.exponent());\n",
       "  };\n",
       "\n",
       "  return initInterpolator.apply(scale, arguments);\n",
       "}\n",
       "\n",
       "function divergingSqrt() {\n",
       "  return divergingPow.apply(null, arguments).exponent(0.5);\n",
       "}\n",
       "\n",
       "exports.scaleBand = band;\n",
       "exports.scaleDiverging = diverging;\n",
       "exports.scaleDivergingLog = divergingLog;\n",
       "exports.scaleDivergingPow = divergingPow;\n",
       "exports.scaleDivergingSqrt = divergingSqrt;\n",
       "exports.scaleDivergingSymlog = divergingSymlog;\n",
       "exports.scaleIdentity = identity$1;\n",
       "exports.scaleImplicit = implicit;\n",
       "exports.scaleLinear = linear;\n",
       "exports.scaleLog = log;\n",
       "exports.scaleOrdinal = ordinal;\n",
       "exports.scalePoint = point;\n",
       "exports.scalePow = pow;\n",
       "exports.scaleQuantile = quantile;\n",
       "exports.scaleQuantize = quantize;\n",
       "exports.scaleRadial = radial;\n",
       "exports.scaleSequential = sequential;\n",
       "exports.scaleSequentialLog = sequentialLog;\n",
       "exports.scaleSequentialPow = sequentialPow;\n",
       "exports.scaleSequentialQuantile = sequentialQuantile;\n",
       "exports.scaleSequentialSqrt = sequentialSqrt;\n",
       "exports.scaleSequentialSymlog = sequentialSymlog;\n",
       "exports.scaleSqrt = sqrt;\n",
       "exports.scaleSymlog = symlog;\n",
       "exports.scaleThreshold = threshold;\n",
       "exports.scaleTime = time;\n",
       "exports.scaleUtc = utcTime;\n",
       "exports.tickFormat = tickFormat;\n",
       "\n",
       "Object.defineProperty(exports, '__esModule', { value: true });\n",
       "\n",
       "}));\n",
       "\n",
       "},{\"d3-array\":2,\"d3-format\":7,\"d3-interpolate\":8,\"d3-time\":14,\"d3-time-format\":13}],11:[function(require,module,exports){\n",
       "// https://d3js.org/d3-selection/ v1.4.1 Copyright 2019 Mike Bostock\n",
       "(function (global, factory) {\n",
       "typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :\n",
       "typeof define === 'function' && define.amd ? define(['exports'], factory) :\n",
       "(global = global || self, factory(global.d3 = global.d3 || {}));\n",
       "}(this, function (exports) { 'use strict';\n",
       "\n",
       "var xhtml = \"http://www.w3.org/1999/xhtml\";\n",
       "\n",
       "var namespaces = {\n",
       "  svg: \"http://www.w3.org/2000/svg\",\n",
       "  xhtml: xhtml,\n",
       "  xlink: \"http://www.w3.org/1999/xlink\",\n",
       "  xml: \"http://www.w3.org/XML/1998/namespace\",\n",
       "  xmlns: \"http://www.w3.org/2000/xmlns/\"\n",
       "};\n",
       "\n",
       "function namespace(name) {\n",
       "  var prefix = name += \"\", i = prefix.indexOf(\":\");\n",
       "  if (i >= 0 && (prefix = name.slice(0, i)) !== \"xmlns\") name = name.slice(i + 1);\n",
       "  return namespaces.hasOwnProperty(prefix) ? {space: namespaces[prefix], local: name} : name;\n",
       "}\n",
       "\n",
       "function creatorInherit(name) {\n",
       "  return function() {\n",
       "    var document = this.ownerDocument,\n",
       "        uri = this.namespaceURI;\n",
       "    return uri === xhtml && document.documentElement.namespaceURI === xhtml\n",
       "        ? document.createElement(name)\n",
       "        : document.createElementNS(uri, name);\n",
       "  };\n",
       "}\n",
       "\n",
       "function creatorFixed(fullname) {\n",
       "  return function() {\n",
       "    return this.ownerDocument.createElementNS(fullname.space, fullname.local);\n",
       "  };\n",
       "}\n",
       "\n",
       "function creator(name) {\n",
       "  var fullname = namespace(name);\n",
       "  return (fullname.local\n",
       "      ? creatorFixed\n",
       "      : creatorInherit)(fullname);\n",
       "}\n",
       "\n",
       "function none() {}\n",
       "\n",
       "function selector(selector) {\n",
       "  return selector == null ? none : function() {\n",
       "    return this.querySelector(selector);\n",
       "  };\n",
       "}\n",
       "\n",
       "function selection_select(select) {\n",
       "  if (typeof select !== \"function\") select = selector(select);\n",
       "\n",
       "  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {\n",
       "    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {\n",
       "      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {\n",
       "        if (\"__data__\" in node) subnode.__data__ = node.__data__;\n",
       "        subgroup[i] = subnode;\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "\n",
       "  return new Selection(subgroups, this._parents);\n",
       "}\n",
       "\n",
       "function empty() {\n",
       "  return [];\n",
       "}\n",
       "\n",
       "function selectorAll(selector) {\n",
       "  return selector == null ? empty : function() {\n",
       "    return this.querySelectorAll(selector);\n",
       "  };\n",
       "}\n",
       "\n",
       "function selection_selectAll(select) {\n",
       "  if (typeof select !== \"function\") select = selectorAll(select);\n",
       "\n",
       "  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {\n",
       "    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {\n",
       "      if (node = group[i]) {\n",
       "        subgroups.push(select.call(node, node.__data__, i, group));\n",
       "        parents.push(node);\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "\n",
       "  return new Selection(subgroups, parents);\n",
       "}\n",
       "\n",
       "function matcher(selector) {\n",
       "  return function() {\n",
       "    return this.matches(selector);\n",
       "  };\n",
       "}\n",
       "\n",
       "function selection_filter(match) {\n",
       "  if (typeof match !== \"function\") match = matcher(match);\n",
       "\n",
       "  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {\n",
       "    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {\n",
       "      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {\n",
       "        subgroup.push(node);\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "\n",
       "  return new Selection(subgroups, this._parents);\n",
       "}\n",
       "\n",
       "function sparse(update) {\n",
       "  return new Array(update.length);\n",
       "}\n",
       "\n",
       "function selection_enter() {\n",
       "  return new Selection(this._enter || this._groups.map(sparse), this._parents);\n",
       "}\n",
       "\n",
       "function EnterNode(parent, datum) {\n",
       "  this.ownerDocument = parent.ownerDocument;\n",
       "  this.namespaceURI = parent.namespaceURI;\n",
       "  this._next = null;\n",
       "  this._parent = parent;\n",
       "  this.__data__ = datum;\n",
       "}\n",
       "\n",
       "EnterNode.prototype = {\n",
       "  constructor: EnterNode,\n",
       "  appendChild: function(child) { return this._parent.insertBefore(child, this._next); },\n",
       "  insertBefore: function(child, next) { return this._parent.insertBefore(child, next); },\n",
       "  querySelector: function(selector) { return this._parent.querySelector(selector); },\n",
       "  querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); }\n",
       "};\n",
       "\n",
       "function constant(x) {\n",
       "  return function() {\n",
       "    return x;\n",
       "  };\n",
       "}\n",
       "\n",
       "var keyPrefix = \"$\"; // Protect against keys like \"__proto__\".\n",
       "\n",
       "function bindIndex(parent, group, enter, update, exit, data) {\n",
       "  var i = 0,\n",
       "      node,\n",
       "      groupLength = group.length,\n",
       "      dataLength = data.length;\n",
       "\n",
       "  // Put any non-null nodes that fit into update.\n",
       "  // Put any null nodes into enter.\n",
       "  // Put any remaining data into enter.\n",
       "  for (; i < dataLength; ++i) {\n",
       "    if (node = group[i]) {\n",
       "      node.__data__ = data[i];\n",
       "      update[i] = node;\n",
       "    } else {\n",
       "      enter[i] = new EnterNode(parent, data[i]);\n",
       "    }\n",
       "  }\n",
       "\n",
       "  // Put any non-null nodes that don't fit into exit.\n",
       "  for (; i < groupLength; ++i) {\n",
       "    if (node = group[i]) {\n",
       "      exit[i] = node;\n",
       "    }\n",
       "  }\n",
       "}\n",
       "\n",
       "function bindKey(parent, group, enter, update, exit, data, key) {\n",
       "  var i,\n",
       "      node,\n",
       "      nodeByKeyValue = {},\n",
       "      groupLength = group.length,\n",
       "      dataLength = data.length,\n",
       "      keyValues = new Array(groupLength),\n",
       "      keyValue;\n",
       "\n",
       "  // Compute the key for each node.\n",
       "  // If multiple nodes have the same key, the duplicates are added to exit.\n",
       "  for (i = 0; i < groupLength; ++i) {\n",
       "    if (node = group[i]) {\n",
       "      keyValues[i] = keyValue = keyPrefix + key.call(node, node.__data__, i, group);\n",
       "      if (keyValue in nodeByKeyValue) {\n",
       "        exit[i] = node;\n",
       "      } else {\n",
       "        nodeByKeyValue[keyValue] = node;\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "\n",
       "  // Compute the key for each datum.\n",
       "  // If there a node associated with this key, join and add it to update.\n",
       "  // If there is not (or the key is a duplicate), add it to enter.\n",
       "  for (i = 0; i < dataLength; ++i) {\n",
       "    keyValue = keyPrefix + key.call(parent, data[i], i, data);\n",
       "    if (node = nodeByKeyValue[keyValue]) {\n",
       "      update[i] = node;\n",
       "      node.__data__ = data[i];\n",
       "      nodeByKeyValue[keyValue] = null;\n",
       "    } else {\n",
       "      enter[i] = new EnterNode(parent, data[i]);\n",
       "    }\n",
       "  }\n",
       "\n",
       "  // Add any remaining nodes that were not bound to data to exit.\n",
       "  for (i = 0; i < groupLength; ++i) {\n",
       "    if ((node = group[i]) && (nodeByKeyValue[keyValues[i]] === node)) {\n",
       "      exit[i] = node;\n",
       "    }\n",
       "  }\n",
       "}\n",
       "\n",
       "function selection_data(value, key) {\n",
       "  if (!value) {\n",
       "    data = new Array(this.size()), j = -1;\n",
       "    this.each(function(d) { data[++j] = d; });\n",
       "    return data;\n",
       "  }\n",
       "\n",
       "  var bind = key ? bindKey : bindIndex,\n",
       "      parents = this._parents,\n",
       "      groups = this._groups;\n",
       "\n",
       "  if (typeof value !== \"function\") value = constant(value);\n",
       "\n",
       "  for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {\n",
       "    var parent = parents[j],\n",
       "        group = groups[j],\n",
       "        groupLength = group.length,\n",
       "        data = value.call(parent, parent && parent.__data__, j, parents),\n",
       "        dataLength = data.length,\n",
       "        enterGroup = enter[j] = new Array(dataLength),\n",
       "        updateGroup = update[j] = new Array(dataLength),\n",
       "        exitGroup = exit[j] = new Array(groupLength);\n",
       "\n",
       "    bind(parent, group, enterGroup, updateGroup, exitGroup, data, key);\n",
       "\n",
       "    // Now connect the enter nodes to their following update node, such that\n",
       "    // appendChild can insert the materialized enter node before this node,\n",
       "    // rather than at the end of the parent node.\n",
       "    for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {\n",
       "      if (previous = enterGroup[i0]) {\n",
       "        if (i0 >= i1) i1 = i0 + 1;\n",
       "        while (!(next = updateGroup[i1]) && ++i1 < dataLength);\n",
       "        previous._next = next || null;\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "\n",
       "  update = new Selection(update, parents);\n",
       "  update._enter = enter;\n",
       "  update._exit = exit;\n",
       "  return update;\n",
       "}\n",
       "\n",
       "function selection_exit() {\n",
       "  return new Selection(this._exit || this._groups.map(sparse), this._parents);\n",
       "}\n",
       "\n",
       "function selection_join(onenter, onupdate, onexit) {\n",
       "  var enter = this.enter(), update = this, exit = this.exit();\n",
       "  enter = typeof onenter === \"function\" ? onenter(enter) : enter.append(onenter + \"\");\n",
       "  if (onupdate != null) update = onupdate(update);\n",
       "  if (onexit == null) exit.remove(); else onexit(exit);\n",
       "  return enter && update ? enter.merge(update).order() : update;\n",
       "}\n",
       "\n",
       "function selection_merge(selection) {\n",
       "\n",
       "  for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {\n",
       "    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {\n",
       "      if (node = group0[i] || group1[i]) {\n",
       "        merge[i] = node;\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "\n",
       "  for (; j < m0; ++j) {\n",
       "    merges[j] = groups0[j];\n",
       "  }\n",
       "\n",
       "  return new Selection(merges, this._parents);\n",
       "}\n",
       "\n",
       "function selection_order() {\n",
       "\n",
       "  for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {\n",
       "    for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {\n",
       "      if (node = group[i]) {\n",
       "        if (next && node.compareDocumentPosition(next) ^ 4) next.parentNode.insertBefore(node, next);\n",
       "        next = node;\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "\n",
       "  return this;\n",
       "}\n",
       "\n",
       "function selection_sort(compare) {\n",
       "  if (!compare) compare = ascending;\n",
       "\n",
       "  function compareNode(a, b) {\n",
       "    return a && b ? compare(a.__data__, b.__data__) : !a - !b;\n",
       "  }\n",
       "\n",
       "  for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {\n",
       "    for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {\n",
       "      if (node = group[i]) {\n",
       "        sortgroup[i] = node;\n",
       "      }\n",
       "    }\n",
       "    sortgroup.sort(compareNode);\n",
       "  }\n",
       "\n",
       "  return new Selection(sortgroups, this._parents).order();\n",
       "}\n",
       "\n",
       "function ascending(a, b) {\n",
       "  return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;\n",
       "}\n",
       "\n",
       "function selection_call() {\n",
       "  var callback = arguments[0];\n",
       "  arguments[0] = this;\n",
       "  callback.apply(null, arguments);\n",
       "  return this;\n",
       "}\n",
       "\n",
       "function selection_nodes() {\n",
       "  var nodes = new Array(this.size()), i = -1;\n",
       "  this.each(function() { nodes[++i] = this; });\n",
       "  return nodes;\n",
       "}\n",
       "\n",
       "function selection_node() {\n",
       "\n",
       "  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {\n",
       "    for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {\n",
       "      var node = group[i];\n",
       "      if (node) return node;\n",
       "    }\n",
       "  }\n",
       "\n",
       "  return null;\n",
       "}\n",
       "\n",
       "function selection_size() {\n",
       "  var size = 0;\n",
       "  this.each(function() { ++size; });\n",
       "  return size;\n",
       "}\n",
       "\n",
       "function selection_empty() {\n",
       "  return !this.node();\n",
       "}\n",
       "\n",
       "function selection_each(callback) {\n",
       "\n",
       "  for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {\n",
       "    for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {\n",
       "      if (node = group[i]) callback.call(node, node.__data__, i, group);\n",
       "    }\n",
       "  }\n",
       "\n",
       "  return this;\n",
       "}\n",
       "\n",
       "function attrRemove(name) {\n",
       "  return function() {\n",
       "    this.removeAttribute(name);\n",
       "  };\n",
       "}\n",
       "\n",
       "function attrRemoveNS(fullname) {\n",
       "  return function() {\n",
       "    this.removeAttributeNS(fullname.space, fullname.local);\n",
       "  };\n",
       "}\n",
       "\n",
       "function attrConstant(name, value) {\n",
       "  return function() {\n",
       "    this.setAttribute(name, value);\n",
       "  };\n",
       "}\n",
       "\n",
       "function attrConstantNS(fullname, value) {\n",
       "  return function() {\n",
       "    this.setAttributeNS(fullname.space, fullname.local, value);\n",
       "  };\n",
       "}\n",
       "\n",
       "function attrFunction(name, value) {\n",
       "  return function() {\n",
       "    var v = value.apply(this, arguments);\n",
       "    if (v == null) this.removeAttribute(name);\n",
       "    else this.setAttribute(name, v);\n",
       "  };\n",
       "}\n",
       "\n",
       "function attrFunctionNS(fullname, value) {\n",
       "  return function() {\n",
       "    var v = value.apply(this, arguments);\n",
       "    if (v == null) this.removeAttributeNS(fullname.space, fullname.local);\n",
       "    else this.setAttributeNS(fullname.space, fullname.local, v);\n",
       "  };\n",
       "}\n",
       "\n",
       "function selection_attr(name, value) {\n",
       "  var fullname = namespace(name);\n",
       "\n",
       "  if (arguments.length < 2) {\n",
       "    var node = this.node();\n",
       "    return fullname.local\n",
       "        ? node.getAttributeNS(fullname.space, fullname.local)\n",
       "        : node.getAttribute(fullname);\n",
       "  }\n",
       "\n",
       "  return this.each((value == null\n",
       "      ? (fullname.local ? attrRemoveNS : attrRemove) : (typeof value === \"function\"\n",
       "      ? (fullname.local ? attrFunctionNS : attrFunction)\n",
       "      : (fullname.local ? attrConstantNS : attrConstant)))(fullname, value));\n",
       "}\n",
       "\n",
       "function defaultView(node) {\n",
       "  return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node\n",
       "      || (node.document && node) // node is a Window\n",
       "      || node.defaultView; // node is a Document\n",
       "}\n",
       "\n",
       "function styleRemove(name) {\n",
       "  return function() {\n",
       "    this.style.removeProperty(name);\n",
       "  };\n",
       "}\n",
       "\n",
       "function styleConstant(name, value, priority) {\n",
       "  return function() {\n",
       "    this.style.setProperty(name, value, priority);\n",
       "  };\n",
       "}\n",
       "\n",
       "function styleFunction(name, value, priority) {\n",
       "  return function() {\n",
       "    var v = value.apply(this, arguments);\n",
       "    if (v == null) this.style.removeProperty(name);\n",
       "    else this.style.setProperty(name, v, priority);\n",
       "  };\n",
       "}\n",
       "\n",
       "function selection_style(name, value, priority) {\n",
       "  return arguments.length > 1\n",
       "      ? this.each((value == null\n",
       "            ? styleRemove : typeof value === \"function\"\n",
       "            ? styleFunction\n",
       "            : styleConstant)(name, value, priority == null ? \"\" : priority))\n",
       "      : styleValue(this.node(), name);\n",
       "}\n",
       "\n",
       "function styleValue(node, name) {\n",
       "  return node.style.getPropertyValue(name)\n",
       "      || defaultView(node).getComputedStyle(node, null).getPropertyValue(name);\n",
       "}\n",
       "\n",
       "function propertyRemove(name) {\n",
       "  return function() {\n",
       "    delete this[name];\n",
       "  };\n",
       "}\n",
       "\n",
       "function propertyConstant(name, value) {\n",
       "  return function() {\n",
       "    this[name] = value;\n",
       "  };\n",
       "}\n",
       "\n",
       "function propertyFunction(name, value) {\n",
       "  return function() {\n",
       "    var v = value.apply(this, arguments);\n",
       "    if (v == null) delete this[name];\n",
       "    else this[name] = v;\n",
       "  };\n",
       "}\n",
       "\n",
       "function selection_property(name, value) {\n",
       "  return arguments.length > 1\n",
       "      ? this.each((value == null\n",
       "          ? propertyRemove : typeof value === \"function\"\n",
       "          ? propertyFunction\n",
       "          : propertyConstant)(name, value))\n",
       "      : this.node()[name];\n",
       "}\n",
       "\n",
       "function classArray(string) {\n",
       "  return string.trim().split(/^|\\s+/);\n",
       "}\n",
       "\n",
       "function classList(node) {\n",
       "  return node.classList || new ClassList(node);\n",
       "}\n",
       "\n",
       "function ClassList(node) {\n",
       "  this._node = node;\n",
       "  this._names = classArray(node.getAttribute(\"class\") || \"\");\n",
       "}\n",
       "\n",
       "ClassList.prototype = {\n",
       "  add: function(name) {\n",
       "    var i = this._names.indexOf(name);\n",
       "    if (i < 0) {\n",
       "      this._names.push(name);\n",
       "      this._node.setAttribute(\"class\", this._names.join(\" \"));\n",
       "    }\n",
       "  },\n",
       "  remove: function(name) {\n",
       "    var i = this._names.indexOf(name);\n",
       "    if (i >= 0) {\n",
       "      this._names.splice(i, 1);\n",
       "      this._node.setAttribute(\"class\", this._names.join(\" \"));\n",
       "    }\n",
       "  },\n",
       "  contains: function(name) {\n",
       "    return this._names.indexOf(name) >= 0;\n",
       "  }\n",
       "};\n",
       "\n",
       "function classedAdd(node, names) {\n",
       "  var list = classList(node), i = -1, n = names.length;\n",
       "  while (++i < n) list.add(names[i]);\n",
       "}\n",
       "\n",
       "function classedRemove(node, names) {\n",
       "  var list = classList(node), i = -1, n = names.length;\n",
       "  while (++i < n) list.remove(names[i]);\n",
       "}\n",
       "\n",
       "function classedTrue(names) {\n",
       "  return function() {\n",
       "    classedAdd(this, names);\n",
       "  };\n",
       "}\n",
       "\n",
       "function classedFalse(names) {\n",
       "  return function() {\n",
       "    classedRemove(this, names);\n",
       "  };\n",
       "}\n",
       "\n",
       "function classedFunction(names, value) {\n",
       "  return function() {\n",
       "    (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);\n",
       "  };\n",
       "}\n",
       "\n",
       "function selection_classed(name, value) {\n",
       "  var names = classArray(name + \"\");\n",
       "\n",
       "  if (arguments.length < 2) {\n",
       "    var list = classList(this.node()), i = -1, n = names.length;\n",
       "    while (++i < n) if (!list.contains(names[i])) return false;\n",
       "    return true;\n",
       "  }\n",
       "\n",
       "  return this.each((typeof value === \"function\"\n",
       "      ? classedFunction : value\n",
       "      ? classedTrue\n",
       "      : classedFalse)(names, value));\n",
       "}\n",
       "\n",
       "function textRemove() {\n",
       "  this.textContent = \"\";\n",
       "}\n",
       "\n",
       "function textConstant(value) {\n",
       "  return function() {\n",
       "    this.textContent = value;\n",
       "  };\n",
       "}\n",
       "\n",
       "function textFunction(value) {\n",
       "  return function() {\n",
       "    var v = value.apply(this, arguments);\n",
       "    this.textContent = v == null ? \"\" : v;\n",
       "  };\n",
       "}\n",
       "\n",
       "function selection_text(value) {\n",
       "  return arguments.length\n",
       "      ? this.each(value == null\n",
       "          ? textRemove : (typeof value === \"function\"\n",
       "          ? textFunction\n",
       "          : textConstant)(value))\n",
       "      : this.node().textContent;\n",
       "}\n",
       "\n",
       "function htmlRemove() {\n",
       "  this.innerHTML = \"\";\n",
       "}\n",
       "\n",
       "function htmlConstant(value) {\n",
       "  return function() {\n",
       "    this.innerHTML = value;\n",
       "  };\n",
       "}\n",
       "\n",
       "function htmlFunction(value) {\n",
       "  return function() {\n",
       "    var v = value.apply(this, arguments);\n",
       "    this.innerHTML = v == null ? \"\" : v;\n",
       "  };\n",
       "}\n",
       "\n",
       "function selection_html(value) {\n",
       "  return arguments.length\n",
       "      ? this.each(value == null\n",
       "          ? htmlRemove : (typeof value === \"function\"\n",
       "          ? htmlFunction\n",
       "          : htmlConstant)(value))\n",
       "      : this.node().innerHTML;\n",
       "}\n",
       "\n",
       "function raise() {\n",
       "  if (this.nextSibling) this.parentNode.appendChild(this);\n",
       "}\n",
       "\n",
       "function selection_raise() {\n",
       "  return this.each(raise);\n",
       "}\n",
       "\n",
       "function lower() {\n",
       "  if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);\n",
       "}\n",
       "\n",
       "function selection_lower() {\n",
       "  return this.each(lower);\n",
       "}\n",
       "\n",
       "function selection_append(name) {\n",
       "  var create = typeof name === \"function\" ? name : creator(name);\n",
       "  return this.select(function() {\n",
       "    return this.appendChild(create.apply(this, arguments));\n",
       "  });\n",
       "}\n",
       "\n",
       "function constantNull() {\n",
       "  return null;\n",
       "}\n",
       "\n",
       "function selection_insert(name, before) {\n",
       "  var create = typeof name === \"function\" ? name : creator(name),\n",
       "      select = before == null ? constantNull : typeof before === \"function\" ? before : selector(before);\n",
       "  return this.select(function() {\n",
       "    return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);\n",
       "  });\n",
       "}\n",
       "\n",
       "function remove() {\n",
       "  var parent = this.parentNode;\n",
       "  if (parent) parent.removeChild(this);\n",
       "}\n",
       "\n",
       "function selection_remove() {\n",
       "  return this.each(remove);\n",
       "}\n",
       "\n",
       "function selection_cloneShallow() {\n",
       "  var clone = this.cloneNode(false), parent = this.parentNode;\n",
       "  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;\n",
       "}\n",
       "\n",
       "function selection_cloneDeep() {\n",
       "  var clone = this.cloneNode(true), parent = this.parentNode;\n",
       "  return parent ? parent.insertBefore(clone, this.nextSibling) : clone;\n",
       "}\n",
       "\n",
       "function selection_clone(deep) {\n",
       "  return this.select(deep ? selection_cloneDeep : selection_cloneShallow);\n",
       "}\n",
       "\n",
       "function selection_datum(value) {\n",
       "  return arguments.length\n",
       "      ? this.property(\"__data__\", value)\n",
       "      : this.node().__data__;\n",
       "}\n",
       "\n",
       "var filterEvents = {};\n",
       "\n",
       "exports.event = null;\n",
       "\n",
       "if (typeof document !== \"undefined\") {\n",
       "  var element = document.documentElement;\n",
       "  if (!(\"onmouseenter\" in element)) {\n",
       "    filterEvents = {mouseenter: \"mouseover\", mouseleave: \"mouseout\"};\n",
       "  }\n",
       "}\n",
       "\n",
       "function filterContextListener(listener, index, group) {\n",
       "  listener = contextListener(listener, index, group);\n",
       "  return function(event) {\n",
       "    var related = event.relatedTarget;\n",
       "    if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) {\n",
       "      listener.call(this, event);\n",
       "    }\n",
       "  };\n",
       "}\n",
       "\n",
       "function contextListener(listener, index, group) {\n",
       "  return function(event1) {\n",
       "    var event0 = exports.event; // Events can be reentrant (e.g., focus).\n",
       "    exports.event = event1;\n",
       "    try {\n",
       "      listener.call(this, this.__data__, index, group);\n",
       "    } finally {\n",
       "      exports.event = event0;\n",
       "    }\n",
       "  };\n",
       "}\n",
       "\n",
       "function parseTypenames(typenames) {\n",
       "  return typenames.trim().split(/^|\\s+/).map(function(t) {\n",
       "    var name = \"\", i = t.indexOf(\".\");\n",
       "    if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);\n",
       "    return {type: t, name: name};\n",
       "  });\n",
       "}\n",
       "\n",
       "function onRemove(typename) {\n",
       "  return function() {\n",
       "    var on = this.__on;\n",
       "    if (!on) return;\n",
       "    for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {\n",
       "      if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {\n",
       "        this.removeEventListener(o.type, o.listener, o.capture);\n",
       "      } else {\n",
       "        on[++i] = o;\n",
       "      }\n",
       "    }\n",
       "    if (++i) on.length = i;\n",
       "    else delete this.__on;\n",
       "  };\n",
       "}\n",
       "\n",
       "function onAdd(typename, value, capture) {\n",
       "  var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;\n",
       "  return function(d, i, group) {\n",
       "    var on = this.__on, o, listener = wrap(value, i, group);\n",
       "    if (on) for (var j = 0, m = on.length; j < m; ++j) {\n",
       "      if ((o = on[j]).type === typename.type && o.name === typename.name) {\n",
       "        this.removeEventListener(o.type, o.listener, o.capture);\n",
       "        this.addEventListener(o.type, o.listener = listener, o.capture = capture);\n",
       "        o.value = value;\n",
       "        return;\n",
       "      }\n",
       "    }\n",
       "    this.addEventListener(typename.type, listener, capture);\n",
       "    o = {type: typename.type, name: typename.name, value: value, listener: listener, capture: capture};\n",
       "    if (!on) this.__on = [o];\n",
       "    else on.push(o);\n",
       "  };\n",
       "}\n",
       "\n",
       "function selection_on(typename, value, capture) {\n",
       "  var typenames = parseTypenames(typename + \"\"), i, n = typenames.length, t;\n",
       "\n",
       "  if (arguments.length < 2) {\n",
       "    var on = this.node().__on;\n",
       "    if (on) for (var j = 0, m = on.length, o; j < m; ++j) {\n",
       "      for (i = 0, o = on[j]; i < n; ++i) {\n",
       "        if ((t = typenames[i]).type === o.type && t.name === o.name) {\n",
       "          return o.value;\n",
       "        }\n",
       "      }\n",
       "    }\n",
       "    return;\n",
       "  }\n",
       "\n",
       "  on = value ? onAdd : onRemove;\n",
       "  if (capture == null) capture = false;\n",
       "  for (i = 0; i < n; ++i) this.each(on(typenames[i], value, capture));\n",
       "  return this;\n",
       "}\n",
       "\n",
       "function customEvent(event1, listener, that, args) {\n",
       "  var event0 = exports.event;\n",
       "  event1.sourceEvent = exports.event;\n",
       "  exports.event = event1;\n",
       "  try {\n",
       "    return listener.apply(that, args);\n",
       "  } finally {\n",
       "    exports.event = event0;\n",
       "  }\n",
       "}\n",
       "\n",
       "function dispatchEvent(node, type, params) {\n",
       "  var window = defaultView(node),\n",
       "      event = window.CustomEvent;\n",
       "\n",
       "  if (typeof event === \"function\") {\n",
       "    event = new event(type, params);\n",
       "  } else {\n",
       "    event = window.document.createEvent(\"Event\");\n",
       "    if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail;\n",
       "    else event.initEvent(type, false, false);\n",
       "  }\n",
       "\n",
       "  node.dispatchEvent(event);\n",
       "}\n",
       "\n",
       "function dispatchConstant(type, params) {\n",
       "  return function() {\n",
       "    return dispatchEvent(this, type, params);\n",
       "  };\n",
       "}\n",
       "\n",
       "function dispatchFunction(type, params) {\n",
       "  return function() {\n",
       "    return dispatchEvent(this, type, params.apply(this, arguments));\n",
       "  };\n",
       "}\n",
       "\n",
       "function selection_dispatch(type, params) {\n",
       "  return this.each((typeof params === \"function\"\n",
       "      ? dispatchFunction\n",
       "      : dispatchConstant)(type, params));\n",
       "}\n",
       "\n",
       "var root = [null];\n",
       "\n",
       "function Selection(groups, parents) {\n",
       "  this._groups = groups;\n",
       "  this._parents = parents;\n",
       "}\n",
       "\n",
       "function selection() {\n",
       "  return new Selection([[document.documentElement]], root);\n",
       "}\n",
       "\n",
       "Selection.prototype = selection.prototype = {\n",
       "  constructor: Selection,\n",
       "  select: selection_select,\n",
       "  selectAll: selection_selectAll,\n",
       "  filter: selection_filter,\n",
       "  data: selection_data,\n",
       "  enter: selection_enter,\n",
       "  exit: selection_exit,\n",
       "  join: selection_join,\n",
       "  merge: selection_merge,\n",
       "  order: selection_order,\n",
       "  sort: selection_sort,\n",
       "  call: selection_call,\n",
       "  nodes: selection_nodes,\n",
       "  node: selection_node,\n",
       "  size: selection_size,\n",
       "  empty: selection_empty,\n",
       "  each: selection_each,\n",
       "  attr: selection_attr,\n",
       "  style: selection_style,\n",
       "  property: selection_property,\n",
       "  classed: selection_classed,\n",
       "  text: selection_text,\n",
       "  html: selection_html,\n",
       "  raise: selection_raise,\n",
       "  lower: selection_lower,\n",
       "  append: selection_append,\n",
       "  insert: selection_insert,\n",
       "  remove: selection_remove,\n",
       "  clone: selection_clone,\n",
       "  datum: selection_datum,\n",
       "  on: selection_on,\n",
       "  dispatch: selection_dispatch\n",
       "};\n",
       "\n",
       "function select(selector) {\n",
       "  return typeof selector === \"string\"\n",
       "      ? new Selection([[document.querySelector(selector)]], [document.documentElement])\n",
       "      : new Selection([[selector]], root);\n",
       "}\n",
       "\n",
       "function create(name) {\n",
       "  return select(creator(name).call(document.documentElement));\n",
       "}\n",
       "\n",
       "var nextId = 0;\n",
       "\n",
       "function local() {\n",
       "  return new Local;\n",
       "}\n",
       "\n",
       "function Local() {\n",
       "  this._ = \"@\" + (++nextId).toString(36);\n",
       "}\n",
       "\n",
       "Local.prototype = local.prototype = {\n",
       "  constructor: Local,\n",
       "  get: function(node) {\n",
       "    var id = this._;\n",
       "    while (!(id in node)) if (!(node = node.parentNode)) return;\n",
       "    return node[id];\n",
       "  },\n",
       "  set: function(node, value) {\n",
       "    return node[this._] = value;\n",
       "  },\n",
       "  remove: function(node) {\n",
       "    return this._ in node && delete node[this._];\n",
       "  },\n",
       "  toString: function() {\n",
       "    return this._;\n",
       "  }\n",
       "};\n",
       "\n",
       "function sourceEvent() {\n",
       "  var current = exports.event, source;\n",
       "  while (source = current.sourceEvent) current = source;\n",
       "  return current;\n",
       "}\n",
       "\n",
       "function point(node, event) {\n",
       "  var svg = node.ownerSVGElement || node;\n",
       "\n",
       "  if (svg.createSVGPoint) {\n",
       "    var point = svg.createSVGPoint();\n",
       "    point.x = event.clientX, point.y = event.clientY;\n",
       "    point = point.matrixTransform(node.getScreenCTM().inverse());\n",
       "    return [point.x, point.y];\n",
       "  }\n",
       "\n",
       "  var rect = node.getBoundingClientRect();\n",
       "  return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];\n",
       "}\n",
       "\n",
       "function mouse(node) {\n",
       "  var event = sourceEvent();\n",
       "  if (event.changedTouches) event = event.changedTouches[0];\n",
       "  return point(node, event);\n",
       "}\n",
       "\n",
       "function selectAll(selector) {\n",
       "  return typeof selector === \"string\"\n",
       "      ? new Selection([document.querySelectorAll(selector)], [document.documentElement])\n",
       "      : new Selection([selector == null ? [] : selector], root);\n",
       "}\n",
       "\n",
       "function touch(node, touches, identifier) {\n",
       "  if (arguments.length < 3) identifier = touches, touches = sourceEvent().changedTouches;\n",
       "\n",
       "  for (var i = 0, n = touches ? touches.length : 0, touch; i < n; ++i) {\n",
       "    if ((touch = touches[i]).identifier === identifier) {\n",
       "      return point(node, touch);\n",
       "    }\n",
       "  }\n",
       "\n",
       "  return null;\n",
       "}\n",
       "\n",
       "function touches(node, touches) {\n",
       "  if (touches == null) touches = sourceEvent().touches;\n",
       "\n",
       "  for (var i = 0, n = touches ? touches.length : 0, points = new Array(n); i < n; ++i) {\n",
       "    points[i] = point(node, touches[i]);\n",
       "  }\n",
       "\n",
       "  return points;\n",
       "}\n",
       "\n",
       "exports.clientPoint = point;\n",
       "exports.create = create;\n",
       "exports.creator = creator;\n",
       "exports.customEvent = customEvent;\n",
       "exports.local = local;\n",
       "exports.matcher = matcher;\n",
       "exports.mouse = mouse;\n",
       "exports.namespace = namespace;\n",
       "exports.namespaces = namespaces;\n",
       "exports.select = select;\n",
       "exports.selectAll = selectAll;\n",
       "exports.selection = selection;\n",
       "exports.selector = selector;\n",
       "exports.selectorAll = selectorAll;\n",
       "exports.style = styleValue;\n",
       "exports.touch = touch;\n",
       "exports.touches = touches;\n",
       "exports.window = defaultView;\n",
       "\n",
       "Object.defineProperty(exports, '__esModule', { value: true });\n",
       "\n",
       "}));\n",
       "\n",
       "},{}],12:[function(require,module,exports){\n",
       "// https://d3js.org/d3-shape/ v1.3.7 Copyright 2019 Mike Bostock\n",
       "(function (global, factory) {\n",
       "typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-path')) :\n",
       "typeof define === 'function' && define.amd ? define(['exports', 'd3-path'], factory) :\n",
       "(global = global || self, factory(global.d3 = global.d3 || {}, global.d3));\n",
       "}(this, function (exports, d3Path) { 'use strict';\n",
       "\n",
       "function constant(x) {\n",
       "  return function constant() {\n",
       "    return x;\n",
       "  };\n",
       "}\n",
       "\n",
       "var abs = Math.abs;\n",
       "var atan2 = Math.atan2;\n",
       "var cos = Math.cos;\n",
       "var max = Math.max;\n",
       "var min = Math.min;\n",
       "var sin = Math.sin;\n",
       "var sqrt = Math.sqrt;\n",
       "\n",
       "var epsilon = 1e-12;\n",
       "var pi = Math.PI;\n",
       "var halfPi = pi / 2;\n",
       "var tau = 2 * pi;\n",
       "\n",
       "function acos(x) {\n",
       "  return x > 1 ? 0 : x < -1 ? pi : Math.acos(x);\n",
       "}\n",
       "\n",
       "function asin(x) {\n",
       "  return x >= 1 ? halfPi : x <= -1 ? -halfPi : Math.asin(x);\n",
       "}\n",
       "\n",
       "function arcInnerRadius(d) {\n",
       "  return d.innerRadius;\n",
       "}\n",
       "\n",
       "function arcOuterRadius(d) {\n",
       "  return d.outerRadius;\n",
       "}\n",
       "\n",
       "function arcStartAngle(d) {\n",
       "  return d.startAngle;\n",
       "}\n",
       "\n",
       "function arcEndAngle(d) {\n",
       "  return d.endAngle;\n",
       "}\n",
       "\n",
       "function arcPadAngle(d) {\n",
       "  return d && d.padAngle; // Note: optional!\n",
       "}\n",
       "\n",
       "function intersect(x0, y0, x1, y1, x2, y2, x3, y3) {\n",
       "  var x10 = x1 - x0, y10 = y1 - y0,\n",
       "      x32 = x3 - x2, y32 = y3 - y2,\n",
       "      t = y32 * x10 - x32 * y10;\n",
       "  if (t * t < epsilon) return;\n",
       "  t = (x32 * (y0 - y2) - y32 * (x0 - x2)) / t;\n",
       "  return [x0 + t * x10, y0 + t * y10];\n",
       "}\n",
       "\n",
       "// Compute perpendicular offset line of length rc.\n",
       "// http://mathworld.wolfram.com/Circle-LineIntersection.html\n",
       "function cornerTangents(x0, y0, x1, y1, r1, rc, cw) {\n",
       "  var x01 = x0 - x1,\n",
       "      y01 = y0 - y1,\n",
       "      lo = (cw ? rc : -rc) / sqrt(x01 * x01 + y01 * y01),\n",
       "      ox = lo * y01,\n",
       "      oy = -lo * x01,\n",
       "      x11 = x0 + ox,\n",
       "      y11 = y0 + oy,\n",
       "      x10 = x1 + ox,\n",
       "      y10 = y1 + oy,\n",
       "      x00 = (x11 + x10) / 2,\n",
       "      y00 = (y11 + y10) / 2,\n",
       "      dx = x10 - x11,\n",
       "      dy = y10 - y11,\n",
       "      d2 = dx * dx + dy * dy,\n",
       "      r = r1 - rc,\n",
       "      D = x11 * y10 - x10 * y11,\n",
       "      d = (dy < 0 ? -1 : 1) * sqrt(max(0, r * r * d2 - D * D)),\n",
       "      cx0 = (D * dy - dx * d) / d2,\n",
       "      cy0 = (-D * dx - dy * d) / d2,\n",
       "      cx1 = (D * dy + dx * d) / d2,\n",
       "      cy1 = (-D * dx + dy * d) / d2,\n",
       "      dx0 = cx0 - x00,\n",
       "      dy0 = cy0 - y00,\n",
       "      dx1 = cx1 - x00,\n",
       "      dy1 = cy1 - y00;\n",
       "\n",
       "  // Pick the closer of the two intersection points.\n",
       "  // TODO Is there a faster way to determine which intersection to use?\n",
       "  if (dx0 * dx0 + dy0 * dy0 > dx1 * dx1 + dy1 * dy1) cx0 = cx1, cy0 = cy1;\n",
       "\n",
       "  return {\n",
       "    cx: cx0,\n",
       "    cy: cy0,\n",
       "    x01: -ox,\n",
       "    y01: -oy,\n",
       "    x11: cx0 * (r1 / r - 1),\n",
       "    y11: cy0 * (r1 / r - 1)\n",
       "  };\n",
       "}\n",
       "\n",
       "function arc() {\n",
       "  var innerRadius = arcInnerRadius,\n",
       "      outerRadius = arcOuterRadius,\n",
       "      cornerRadius = constant(0),\n",
       "      padRadius = null,\n",
       "      startAngle = arcStartAngle,\n",
       "      endAngle = arcEndAngle,\n",
       "      padAngle = arcPadAngle,\n",
       "      context = null;\n",
       "\n",
       "  function arc() {\n",
       "    var buffer,\n",
       "        r,\n",
       "        r0 = +innerRadius.apply(this, arguments),\n",
       "        r1 = +outerRadius.apply(this, arguments),\n",
       "        a0 = startAngle.apply(this, arguments) - halfPi,\n",
       "        a1 = endAngle.apply(this, arguments) - halfPi,\n",
       "        da = abs(a1 - a0),\n",
       "        cw = a1 > a0;\n",
       "\n",
       "    if (!context) context = buffer = d3Path.path();\n",
       "\n",
       "    // Ensure that the outer radius is always larger than the inner radius.\n",
       "    if (r1 < r0) r = r1, r1 = r0, r0 = r;\n",
       "\n",
       "    // Is it a point?\n",
       "    if (!(r1 > epsilon)) context.moveTo(0, 0);\n",
       "\n",
       "    // Or is it a circle or annulus?\n",
       "    else if (da > tau - epsilon) {\n",
       "      context.moveTo(r1 * cos(a0), r1 * sin(a0));\n",
       "      context.arc(0, 0, r1, a0, a1, !cw);\n",
       "      if (r0 > epsilon) {\n",
       "        context.moveTo(r0 * cos(a1), r0 * sin(a1));\n",
       "        context.arc(0, 0, r0, a1, a0, cw);\n",
       "      }\n",
       "    }\n",
       "\n",
       "    // Or is it a circular or annular sector?\n",
       "    else {\n",
       "      var a01 = a0,\n",
       "          a11 = a1,\n",
       "          a00 = a0,\n",
       "          a10 = a1,\n",
       "          da0 = da,\n",
       "          da1 = da,\n",
       "          ap = padAngle.apply(this, arguments) / 2,\n",
       "          rp = (ap > epsilon) && (padRadius ? +padRadius.apply(this, arguments) : sqrt(r0 * r0 + r1 * r1)),\n",
       "          rc = min(abs(r1 - r0) / 2, +cornerRadius.apply(this, arguments)),\n",
       "          rc0 = rc,\n",
       "          rc1 = rc,\n",
       "          t0,\n",
       "          t1;\n",
       "\n",
       "      // Apply padding? Note that since r1 >= r0, da1 >= da0.\n",
       "      if (rp > epsilon) {\n",
       "        var p0 = asin(rp / r0 * sin(ap)),\n",
       "            p1 = asin(rp / r1 * sin(ap));\n",
       "        if ((da0 -= p0 * 2) > epsilon) p0 *= (cw ? 1 : -1), a00 += p0, a10 -= p0;\n",
       "        else da0 = 0, a00 = a10 = (a0 + a1) / 2;\n",
       "        if ((da1 -= p1 * 2) > epsilon) p1 *= (cw ? 1 : -1), a01 += p1, a11 -= p1;\n",
       "        else da1 = 0, a01 = a11 = (a0 + a1) / 2;\n",
       "      }\n",
       "\n",
       "      var x01 = r1 * cos(a01),\n",
       "          y01 = r1 * sin(a01),\n",
       "          x10 = r0 * cos(a10),\n",
       "          y10 = r0 * sin(a10);\n",
       "\n",
       "      // Apply rounded corners?\n",
       "      if (rc > epsilon) {\n",
       "        var x11 = r1 * cos(a11),\n",
       "            y11 = r1 * sin(a11),\n",
       "            x00 = r0 * cos(a00),\n",
       "            y00 = r0 * sin(a00),\n",
       "            oc;\n",
       "\n",
       "        // Restrict the corner radius according to the sector angle.\n",
       "        if (da < pi && (oc = intersect(x01, y01, x00, y00, x11, y11, x10, y10))) {\n",
       "          var ax = x01 - oc[0],\n",
       "              ay = y01 - oc[1],\n",
       "              bx = x11 - oc[0],\n",
       "              by = y11 - oc[1],\n",
       "              kc = 1 / sin(acos((ax * bx + ay * by) / (sqrt(ax * ax + ay * ay) * sqrt(bx * bx + by * by))) / 2),\n",
       "              lc = sqrt(oc[0] * oc[0] + oc[1] * oc[1]);\n",
       "          rc0 = min(rc, (r0 - lc) / (kc - 1));\n",
       "          rc1 = min(rc, (r1 - lc) / (kc + 1));\n",
       "        }\n",
       "      }\n",
       "\n",
       "      // Is the sector collapsed to a line?\n",
       "      if (!(da1 > epsilon)) context.moveTo(x01, y01);\n",
       "\n",
       "      // Does the sector's outer ring have rounded corners?\n",
       "      else if (rc1 > epsilon) {\n",
       "        t0 = cornerTangents(x00, y00, x01, y01, r1, rc1, cw);\n",
       "        t1 = cornerTangents(x11, y11, x10, y10, r1, rc1, cw);\n",
       "\n",
       "        context.moveTo(t0.cx + t0.x01, t0.cy + t0.y01);\n",
       "\n",
       "        // Have the corners merged?\n",
       "        if (rc1 < rc) context.arc(t0.cx, t0.cy, rc1, atan2(t0.y01, t0.x01), atan2(t1.y01, t1.x01), !cw);\n",
       "\n",
       "        // Otherwise, draw the two corners and the ring.\n",
       "        else {\n",
       "          context.arc(t0.cx, t0.cy, rc1, atan2(t0.y01, t0.x01), atan2(t0.y11, t0.x11), !cw);\n",
       "          context.arc(0, 0, r1, atan2(t0.cy + t0.y11, t0.cx + t0.x11), atan2(t1.cy + t1.y11, t1.cx + t1.x11), !cw);\n",
       "          context.arc(t1.cx, t1.cy, rc1, atan2(t1.y11, t1.x11), atan2(t1.y01, t1.x01), !cw);\n",
       "        }\n",
       "      }\n",
       "\n",
       "      // Or is the outer ring just a circular arc?\n",
       "      else context.moveTo(x01, y01), context.arc(0, 0, r1, a01, a11, !cw);\n",
       "\n",
       "      // Is there no inner ring, and it's a circular sector?\n",
       "      // Or perhaps it's an annular sector collapsed due to padding?\n",
       "      if (!(r0 > epsilon) || !(da0 > epsilon)) context.lineTo(x10, y10);\n",
       "\n",
       "      // Does the sector's inner ring (or point) have rounded corners?\n",
       "      else if (rc0 > epsilon) {\n",
       "        t0 = cornerTangents(x10, y10, x11, y11, r0, -rc0, cw);\n",
       "        t1 = cornerTangents(x01, y01, x00, y00, r0, -rc0, cw);\n",
       "\n",
       "        context.lineTo(t0.cx + t0.x01, t0.cy + t0.y01);\n",
       "\n",
       "        // Have the corners merged?\n",
       "        if (rc0 < rc) context.arc(t0.cx, t0.cy, rc0, atan2(t0.y01, t0.x01), atan2(t1.y01, t1.x01), !cw);\n",
       "\n",
       "        // Otherwise, draw the two corners and the ring.\n",
       "        else {\n",
       "          context.arc(t0.cx, t0.cy, rc0, atan2(t0.y01, t0.x01), atan2(t0.y11, t0.x11), !cw);\n",
       "          context.arc(0, 0, r0, atan2(t0.cy + t0.y11, t0.cx + t0.x11), atan2(t1.cy + t1.y11, t1.cx + t1.x11), cw);\n",
       "          context.arc(t1.cx, t1.cy, rc0, atan2(t1.y11, t1.x11), atan2(t1.y01, t1.x01), !cw);\n",
       "        }\n",
       "      }\n",
       "\n",
       "      // Or is the inner ring just a circular arc?\n",
       "      else context.arc(0, 0, r0, a10, a00, cw);\n",
       "    }\n",
       "\n",
       "    context.closePath();\n",
       "\n",
       "    if (buffer) return context = null, buffer + \"\" || null;\n",
       "  }\n",
       "\n",
       "  arc.centroid = function() {\n",
       "    var r = (+innerRadius.apply(this, arguments) + +outerRadius.apply(this, arguments)) / 2,\n",
       "        a = (+startAngle.apply(this, arguments) + +endAngle.apply(this, arguments)) / 2 - pi / 2;\n",
       "    return [cos(a) * r, sin(a) * r];\n",
       "  };\n",
       "\n",
       "  arc.innerRadius = function(_) {\n",
       "    return arguments.length ? (innerRadius = typeof _ === \"function\" ? _ : constant(+_), arc) : innerRadius;\n",
       "  };\n",
       "\n",
       "  arc.outerRadius = function(_) {\n",
       "    return arguments.length ? (outerRadius = typeof _ === \"function\" ? _ : constant(+_), arc) : outerRadius;\n",
       "  };\n",
       "\n",
       "  arc.cornerRadius = function(_) {\n",
       "    return arguments.length ? (cornerRadius = typeof _ === \"function\" ? _ : constant(+_), arc) : cornerRadius;\n",
       "  };\n",
       "\n",
       "  arc.padRadius = function(_) {\n",
       "    return arguments.length ? (padRadius = _ == null ? null : typeof _ === \"function\" ? _ : constant(+_), arc) : padRadius;\n",
       "  };\n",
       "\n",
       "  arc.startAngle = function(_) {\n",
       "    return arguments.length ? (startAngle = typeof _ === \"function\" ? _ : constant(+_), arc) : startAngle;\n",
       "  };\n",
       "\n",
       "  arc.endAngle = function(_) {\n",
       "    return arguments.length ? (endAngle = typeof _ === \"function\" ? _ : constant(+_), arc) : endAngle;\n",
       "  };\n",
       "\n",
       "  arc.padAngle = function(_) {\n",
       "    return arguments.length ? (padAngle = typeof _ === \"function\" ? _ : constant(+_), arc) : padAngle;\n",
       "  };\n",
       "\n",
       "  arc.context = function(_) {\n",
       "    return arguments.length ? ((context = _ == null ? null : _), arc) : context;\n",
       "  };\n",
       "\n",
       "  return arc;\n",
       "}\n",
       "\n",
       "function Linear(context) {\n",
       "  this._context = context;\n",
       "}\n",
       "\n",
       "Linear.prototype = {\n",
       "  areaStart: function() {\n",
       "    this._line = 0;\n",
       "  },\n",
       "  areaEnd: function() {\n",
       "    this._line = NaN;\n",
       "  },\n",
       "  lineStart: function() {\n",
       "    this._point = 0;\n",
       "  },\n",
       "  lineEnd: function() {\n",
       "    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n",
       "    this._line = 1 - this._line;\n",
       "  },\n",
       "  point: function(x, y) {\n",
       "    x = +x, y = +y;\n",
       "    switch (this._point) {\n",
       "      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n",
       "      case 1: this._point = 2; // proceed\n",
       "      default: this._context.lineTo(x, y); break;\n",
       "    }\n",
       "  }\n",
       "};\n",
       "\n",
       "function curveLinear(context) {\n",
       "  return new Linear(context);\n",
       "}\n",
       "\n",
       "function x(p) {\n",
       "  return p[0];\n",
       "}\n",
       "\n",
       "function y(p) {\n",
       "  return p[1];\n",
       "}\n",
       "\n",
       "function line() {\n",
       "  var x$1 = x,\n",
       "      y$1 = y,\n",
       "      defined = constant(true),\n",
       "      context = null,\n",
       "      curve = curveLinear,\n",
       "      output = null;\n",
       "\n",
       "  function line(data) {\n",
       "    var i,\n",
       "        n = data.length,\n",
       "        d,\n",
       "        defined0 = false,\n",
       "        buffer;\n",
       "\n",
       "    if (context == null) output = curve(buffer = d3Path.path());\n",
       "\n",
       "    for (i = 0; i <= n; ++i) {\n",
       "      if (!(i < n && defined(d = data[i], i, data)) === defined0) {\n",
       "        if (defined0 = !defined0) output.lineStart();\n",
       "        else output.lineEnd();\n",
       "      }\n",
       "      if (defined0) output.point(+x$1(d, i, data), +y$1(d, i, data));\n",
       "    }\n",
       "\n",
       "    if (buffer) return output = null, buffer + \"\" || null;\n",
       "  }\n",
       "\n",
       "  line.x = function(_) {\n",
       "    return arguments.length ? (x$1 = typeof _ === \"function\" ? _ : constant(+_), line) : x$1;\n",
       "  };\n",
       "\n",
       "  line.y = function(_) {\n",
       "    return arguments.length ? (y$1 = typeof _ === \"function\" ? _ : constant(+_), line) : y$1;\n",
       "  };\n",
       "\n",
       "  line.defined = function(_) {\n",
       "    return arguments.length ? (defined = typeof _ === \"function\" ? _ : constant(!!_), line) : defined;\n",
       "  };\n",
       "\n",
       "  line.curve = function(_) {\n",
       "    return arguments.length ? (curve = _, context != null && (output = curve(context)), line) : curve;\n",
       "  };\n",
       "\n",
       "  line.context = function(_) {\n",
       "    return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), line) : context;\n",
       "  };\n",
       "\n",
       "  return line;\n",
       "}\n",
       "\n",
       "function area() {\n",
       "  var x0 = x,\n",
       "      x1 = null,\n",
       "      y0 = constant(0),\n",
       "      y1 = y,\n",
       "      defined = constant(true),\n",
       "      context = null,\n",
       "      curve = curveLinear,\n",
       "      output = null;\n",
       "\n",
       "  function area(data) {\n",
       "    var i,\n",
       "        j,\n",
       "        k,\n",
       "        n = data.length,\n",
       "        d,\n",
       "        defined0 = false,\n",
       "        buffer,\n",
       "        x0z = new Array(n),\n",
       "        y0z = new Array(n);\n",
       "\n",
       "    if (context == null) output = curve(buffer = d3Path.path());\n",
       "\n",
       "    for (i = 0; i <= n; ++i) {\n",
       "      if (!(i < n && defined(d = data[i], i, data)) === defined0) {\n",
       "        if (defined0 = !defined0) {\n",
       "          j = i;\n",
       "          output.areaStart();\n",
       "          output.lineStart();\n",
       "        } else {\n",
       "          output.lineEnd();\n",
       "          output.lineStart();\n",
       "          for (k = i - 1; k >= j; --k) {\n",
       "            output.point(x0z[k], y0z[k]);\n",
       "          }\n",
       "          output.lineEnd();\n",
       "          output.areaEnd();\n",
       "        }\n",
       "      }\n",
       "      if (defined0) {\n",
       "        x0z[i] = +x0(d, i, data), y0z[i] = +y0(d, i, data);\n",
       "        output.point(x1 ? +x1(d, i, data) : x0z[i], y1 ? +y1(d, i, data) : y0z[i]);\n",
       "      }\n",
       "    }\n",
       "\n",
       "    if (buffer) return output = null, buffer + \"\" || null;\n",
       "  }\n",
       "\n",
       "  function arealine() {\n",
       "    return line().defined(defined).curve(curve).context(context);\n",
       "  }\n",
       "\n",
       "  area.x = function(_) {\n",
       "    return arguments.length ? (x0 = typeof _ === \"function\" ? _ : constant(+_), x1 = null, area) : x0;\n",
       "  };\n",
       "\n",
       "  area.x0 = function(_) {\n",
       "    return arguments.length ? (x0 = typeof _ === \"function\" ? _ : constant(+_), area) : x0;\n",
       "  };\n",
       "\n",
       "  area.x1 = function(_) {\n",
       "    return arguments.length ? (x1 = _ == null ? null : typeof _ === \"function\" ? _ : constant(+_), area) : x1;\n",
       "  };\n",
       "\n",
       "  area.y = function(_) {\n",
       "    return arguments.length ? (y0 = typeof _ === \"function\" ? _ : constant(+_), y1 = null, area) : y0;\n",
       "  };\n",
       "\n",
       "  area.y0 = function(_) {\n",
       "    return arguments.length ? (y0 = typeof _ === \"function\" ? _ : constant(+_), area) : y0;\n",
       "  };\n",
       "\n",
       "  area.y1 = function(_) {\n",
       "    return arguments.length ? (y1 = _ == null ? null : typeof _ === \"function\" ? _ : constant(+_), area) : y1;\n",
       "  };\n",
       "\n",
       "  area.lineX0 =\n",
       "  area.lineY0 = function() {\n",
       "    return arealine().x(x0).y(y0);\n",
       "  };\n",
       "\n",
       "  area.lineY1 = function() {\n",
       "    return arealine().x(x0).y(y1);\n",
       "  };\n",
       "\n",
       "  area.lineX1 = function() {\n",
       "    return arealine().x(x1).y(y0);\n",
       "  };\n",
       "\n",
       "  area.defined = function(_) {\n",
       "    return arguments.length ? (defined = typeof _ === \"function\" ? _ : constant(!!_), area) : defined;\n",
       "  };\n",
       "\n",
       "  area.curve = function(_) {\n",
       "    return arguments.length ? (curve = _, context != null && (output = curve(context)), area) : curve;\n",
       "  };\n",
       "\n",
       "  area.context = function(_) {\n",
       "    return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), area) : context;\n",
       "  };\n",
       "\n",
       "  return area;\n",
       "}\n",
       "\n",
       "function descending(a, b) {\n",
       "  return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;\n",
       "}\n",
       "\n",
       "function identity(d) {\n",
       "  return d;\n",
       "}\n",
       "\n",
       "function pie() {\n",
       "  var value = identity,\n",
       "      sortValues = descending,\n",
       "      sort = null,\n",
       "      startAngle = constant(0),\n",
       "      endAngle = constant(tau),\n",
       "      padAngle = constant(0);\n",
       "\n",
       "  function pie(data) {\n",
       "    var i,\n",
       "        n = data.length,\n",
       "        j,\n",
       "        k,\n",
       "        sum = 0,\n",
       "        index = new Array(n),\n",
       "        arcs = new Array(n),\n",
       "        a0 = +startAngle.apply(this, arguments),\n",
       "        da = Math.min(tau, Math.max(-tau, endAngle.apply(this, arguments) - a0)),\n",
       "        a1,\n",
       "        p = Math.min(Math.abs(da) / n, padAngle.apply(this, arguments)),\n",
       "        pa = p * (da < 0 ? -1 : 1),\n",
       "        v;\n",
       "\n",
       "    for (i = 0; i < n; ++i) {\n",
       "      if ((v = arcs[index[i] = i] = +value(data[i], i, data)) > 0) {\n",
       "        sum += v;\n",
       "      }\n",
       "    }\n",
       "\n",
       "    // Optionally sort the arcs by previously-computed values or by data.\n",
       "    if (sortValues != null) index.sort(function(i, j) { return sortValues(arcs[i], arcs[j]); });\n",
       "    else if (sort != null) index.sort(function(i, j) { return sort(data[i], data[j]); });\n",
       "\n",
       "    // Compute the arcs! They are stored in the original data's order.\n",
       "    for (i = 0, k = sum ? (da - n * pa) / sum : 0; i < n; ++i, a0 = a1) {\n",
       "      j = index[i], v = arcs[j], a1 = a0 + (v > 0 ? v * k : 0) + pa, arcs[j] = {\n",
       "        data: data[j],\n",
       "        index: i,\n",
       "        value: v,\n",
       "        startAngle: a0,\n",
       "        endAngle: a1,\n",
       "        padAngle: p\n",
       "      };\n",
       "    }\n",
       "\n",
       "    return arcs;\n",
       "  }\n",
       "\n",
       "  pie.value = function(_) {\n",
       "    return arguments.length ? (value = typeof _ === \"function\" ? _ : constant(+_), pie) : value;\n",
       "  };\n",
       "\n",
       "  pie.sortValues = function(_) {\n",
       "    return arguments.length ? (sortValues = _, sort = null, pie) : sortValues;\n",
       "  };\n",
       "\n",
       "  pie.sort = function(_) {\n",
       "    return arguments.length ? (sort = _, sortValues = null, pie) : sort;\n",
       "  };\n",
       "\n",
       "  pie.startAngle = function(_) {\n",
       "    return arguments.length ? (startAngle = typeof _ === \"function\" ? _ : constant(+_), pie) : startAngle;\n",
       "  };\n",
       "\n",
       "  pie.endAngle = function(_) {\n",
       "    return arguments.length ? (endAngle = typeof _ === \"function\" ? _ : constant(+_), pie) : endAngle;\n",
       "  };\n",
       "\n",
       "  pie.padAngle = function(_) {\n",
       "    return arguments.length ? (padAngle = typeof _ === \"function\" ? _ : constant(+_), pie) : padAngle;\n",
       "  };\n",
       "\n",
       "  return pie;\n",
       "}\n",
       "\n",
       "var curveRadialLinear = curveRadial(curveLinear);\n",
       "\n",
       "function Radial(curve) {\n",
       "  this._curve = curve;\n",
       "}\n",
       "\n",
       "Radial.prototype = {\n",
       "  areaStart: function() {\n",
       "    this._curve.areaStart();\n",
       "  },\n",
       "  areaEnd: function() {\n",
       "    this._curve.areaEnd();\n",
       "  },\n",
       "  lineStart: function() {\n",
       "    this._curve.lineStart();\n",
       "  },\n",
       "  lineEnd: function() {\n",
       "    this._curve.lineEnd();\n",
       "  },\n",
       "  point: function(a, r) {\n",
       "    this._curve.point(r * Math.sin(a), r * -Math.cos(a));\n",
       "  }\n",
       "};\n",
       "\n",
       "function curveRadial(curve) {\n",
       "\n",
       "  function radial(context) {\n",
       "    return new Radial(curve(context));\n",
       "  }\n",
       "\n",
       "  radial._curve = curve;\n",
       "\n",
       "  return radial;\n",
       "}\n",
       "\n",
       "function lineRadial(l) {\n",
       "  var c = l.curve;\n",
       "\n",
       "  l.angle = l.x, delete l.x;\n",
       "  l.radius = l.y, delete l.y;\n",
       "\n",
       "  l.curve = function(_) {\n",
       "    return arguments.length ? c(curveRadial(_)) : c()._curve;\n",
       "  };\n",
       "\n",
       "  return l;\n",
       "}\n",
       "\n",
       "function lineRadial$1() {\n",
       "  return lineRadial(line().curve(curveRadialLinear));\n",
       "}\n",
       "\n",
       "function areaRadial() {\n",
       "  var a = area().curve(curveRadialLinear),\n",
       "      c = a.curve,\n",
       "      x0 = a.lineX0,\n",
       "      x1 = a.lineX1,\n",
       "      y0 = a.lineY0,\n",
       "      y1 = a.lineY1;\n",
       "\n",
       "  a.angle = a.x, delete a.x;\n",
       "  a.startAngle = a.x0, delete a.x0;\n",
       "  a.endAngle = a.x1, delete a.x1;\n",
       "  a.radius = a.y, delete a.y;\n",
       "  a.innerRadius = a.y0, delete a.y0;\n",
       "  a.outerRadius = a.y1, delete a.y1;\n",
       "  a.lineStartAngle = function() { return lineRadial(x0()); }, delete a.lineX0;\n",
       "  a.lineEndAngle = function() { return lineRadial(x1()); }, delete a.lineX1;\n",
       "  a.lineInnerRadius = function() { return lineRadial(y0()); }, delete a.lineY0;\n",
       "  a.lineOuterRadius = function() { return lineRadial(y1()); }, delete a.lineY1;\n",
       "\n",
       "  a.curve = function(_) {\n",
       "    return arguments.length ? c(curveRadial(_)) : c()._curve;\n",
       "  };\n",
       "\n",
       "  return a;\n",
       "}\n",
       "\n",
       "function pointRadial(x, y) {\n",
       "  return [(y = +y) * Math.cos(x -= Math.PI / 2), y * Math.sin(x)];\n",
       "}\n",
       "\n",
       "var slice = Array.prototype.slice;\n",
       "\n",
       "function linkSource(d) {\n",
       "  return d.source;\n",
       "}\n",
       "\n",
       "function linkTarget(d) {\n",
       "  return d.target;\n",
       "}\n",
       "\n",
       "function link(curve) {\n",
       "  var source = linkSource,\n",
       "      target = linkTarget,\n",
       "      x$1 = x,\n",
       "      y$1 = y,\n",
       "      context = null;\n",
       "\n",
       "  function link() {\n",
       "    var buffer, argv = slice.call(arguments), s = source.apply(this, argv), t = target.apply(this, argv);\n",
       "    if (!context) context = buffer = d3Path.path();\n",
       "    curve(context, +x$1.apply(this, (argv[0] = s, argv)), +y$1.apply(this, argv), +x$1.apply(this, (argv[0] = t, argv)), +y$1.apply(this, argv));\n",
       "    if (buffer) return context = null, buffer + \"\" || null;\n",
       "  }\n",
       "\n",
       "  link.source = function(_) {\n",
       "    return arguments.length ? (source = _, link) : source;\n",
       "  };\n",
       "\n",
       "  link.target = function(_) {\n",
       "    return arguments.length ? (target = _, link) : target;\n",
       "  };\n",
       "\n",
       "  link.x = function(_) {\n",
       "    return arguments.length ? (x$1 = typeof _ === \"function\" ? _ : constant(+_), link) : x$1;\n",
       "  };\n",
       "\n",
       "  link.y = function(_) {\n",
       "    return arguments.length ? (y$1 = typeof _ === \"function\" ? _ : constant(+_), link) : y$1;\n",
       "  };\n",
       "\n",
       "  link.context = function(_) {\n",
       "    return arguments.length ? ((context = _ == null ? null : _), link) : context;\n",
       "  };\n",
       "\n",
       "  return link;\n",
       "}\n",
       "\n",
       "function curveHorizontal(context, x0, y0, x1, y1) {\n",
       "  context.moveTo(x0, y0);\n",
       "  context.bezierCurveTo(x0 = (x0 + x1) / 2, y0, x0, y1, x1, y1);\n",
       "}\n",
       "\n",
       "function curveVertical(context, x0, y0, x1, y1) {\n",
       "  context.moveTo(x0, y0);\n",
       "  context.bezierCurveTo(x0, y0 = (y0 + y1) / 2, x1, y0, x1, y1);\n",
       "}\n",
       "\n",
       "function curveRadial$1(context, x0, y0, x1, y1) {\n",
       "  var p0 = pointRadial(x0, y0),\n",
       "      p1 = pointRadial(x0, y0 = (y0 + y1) / 2),\n",
       "      p2 = pointRadial(x1, y0),\n",
       "      p3 = pointRadial(x1, y1);\n",
       "  context.moveTo(p0[0], p0[1]);\n",
       "  context.bezierCurveTo(p1[0], p1[1], p2[0], p2[1], p3[0], p3[1]);\n",
       "}\n",
       "\n",
       "function linkHorizontal() {\n",
       "  return link(curveHorizontal);\n",
       "}\n",
       "\n",
       "function linkVertical() {\n",
       "  return link(curveVertical);\n",
       "}\n",
       "\n",
       "function linkRadial() {\n",
       "  var l = link(curveRadial$1);\n",
       "  l.angle = l.x, delete l.x;\n",
       "  l.radius = l.y, delete l.y;\n",
       "  return l;\n",
       "}\n",
       "\n",
       "var circle = {\n",
       "  draw: function(context, size) {\n",
       "    var r = Math.sqrt(size / pi);\n",
       "    context.moveTo(r, 0);\n",
       "    context.arc(0, 0, r, 0, tau);\n",
       "  }\n",
       "};\n",
       "\n",
       "var cross = {\n",
       "  draw: function(context, size) {\n",
       "    var r = Math.sqrt(size / 5) / 2;\n",
       "    context.moveTo(-3 * r, -r);\n",
       "    context.lineTo(-r, -r);\n",
       "    context.lineTo(-r, -3 * r);\n",
       "    context.lineTo(r, -3 * r);\n",
       "    context.lineTo(r, -r);\n",
       "    context.lineTo(3 * r, -r);\n",
       "    context.lineTo(3 * r, r);\n",
       "    context.lineTo(r, r);\n",
       "    context.lineTo(r, 3 * r);\n",
       "    context.lineTo(-r, 3 * r);\n",
       "    context.lineTo(-r, r);\n",
       "    context.lineTo(-3 * r, r);\n",
       "    context.closePath();\n",
       "  }\n",
       "};\n",
       "\n",
       "var tan30 = Math.sqrt(1 / 3),\n",
       "    tan30_2 = tan30 * 2;\n",
       "\n",
       "var diamond = {\n",
       "  draw: function(context, size) {\n",
       "    var y = Math.sqrt(size / tan30_2),\n",
       "        x = y * tan30;\n",
       "    context.moveTo(0, -y);\n",
       "    context.lineTo(x, 0);\n",
       "    context.lineTo(0, y);\n",
       "    context.lineTo(-x, 0);\n",
       "    context.closePath();\n",
       "  }\n",
       "};\n",
       "\n",
       "var ka = 0.89081309152928522810,\n",
       "    kr = Math.sin(pi / 10) / Math.sin(7 * pi / 10),\n",
       "    kx = Math.sin(tau / 10) * kr,\n",
       "    ky = -Math.cos(tau / 10) * kr;\n",
       "\n",
       "var star = {\n",
       "  draw: function(context, size) {\n",
       "    var r = Math.sqrt(size * ka),\n",
       "        x = kx * r,\n",
       "        y = ky * r;\n",
       "    context.moveTo(0, -r);\n",
       "    context.lineTo(x, y);\n",
       "    for (var i = 1; i < 5; ++i) {\n",
       "      var a = tau * i / 5,\n",
       "          c = Math.cos(a),\n",
       "          s = Math.sin(a);\n",
       "      context.lineTo(s * r, -c * r);\n",
       "      context.lineTo(c * x - s * y, s * x + c * y);\n",
       "    }\n",
       "    context.closePath();\n",
       "  }\n",
       "};\n",
       "\n",
       "var square = {\n",
       "  draw: function(context, size) {\n",
       "    var w = Math.sqrt(size),\n",
       "        x = -w / 2;\n",
       "    context.rect(x, x, w, w);\n",
       "  }\n",
       "};\n",
       "\n",
       "var sqrt3 = Math.sqrt(3);\n",
       "\n",
       "var triangle = {\n",
       "  draw: function(context, size) {\n",
       "    var y = -Math.sqrt(size / (sqrt3 * 3));\n",
       "    context.moveTo(0, y * 2);\n",
       "    context.lineTo(-sqrt3 * y, -y);\n",
       "    context.lineTo(sqrt3 * y, -y);\n",
       "    context.closePath();\n",
       "  }\n",
       "};\n",
       "\n",
       "var c = -0.5,\n",
       "    s = Math.sqrt(3) / 2,\n",
       "    k = 1 / Math.sqrt(12),\n",
       "    a = (k / 2 + 1) * 3;\n",
       "\n",
       "var wye = {\n",
       "  draw: function(context, size) {\n",
       "    var r = Math.sqrt(size / a),\n",
       "        x0 = r / 2,\n",
       "        y0 = r * k,\n",
       "        x1 = x0,\n",
       "        y1 = r * k + r,\n",
       "        x2 = -x1,\n",
       "        y2 = y1;\n",
       "    context.moveTo(x0, y0);\n",
       "    context.lineTo(x1, y1);\n",
       "    context.lineTo(x2, y2);\n",
       "    context.lineTo(c * x0 - s * y0, s * x0 + c * y0);\n",
       "    context.lineTo(c * x1 - s * y1, s * x1 + c * y1);\n",
       "    context.lineTo(c * x2 - s * y2, s * x2 + c * y2);\n",
       "    context.lineTo(c * x0 + s * y0, c * y0 - s * x0);\n",
       "    context.lineTo(c * x1 + s * y1, c * y1 - s * x1);\n",
       "    context.lineTo(c * x2 + s * y2, c * y2 - s * x2);\n",
       "    context.closePath();\n",
       "  }\n",
       "};\n",
       "\n",
       "var symbols = [\n",
       "  circle,\n",
       "  cross,\n",
       "  diamond,\n",
       "  square,\n",
       "  star,\n",
       "  triangle,\n",
       "  wye\n",
       "];\n",
       "\n",
       "function symbol() {\n",
       "  var type = constant(circle),\n",
       "      size = constant(64),\n",
       "      context = null;\n",
       "\n",
       "  function symbol() {\n",
       "    var buffer;\n",
       "    if (!context) context = buffer = d3Path.path();\n",
       "    type.apply(this, arguments).draw(context, +size.apply(this, arguments));\n",
       "    if (buffer) return context = null, buffer + \"\" || null;\n",
       "  }\n",
       "\n",
       "  symbol.type = function(_) {\n",
       "    return arguments.length ? (type = typeof _ === \"function\" ? _ : constant(_), symbol) : type;\n",
       "  };\n",
       "\n",
       "  symbol.size = function(_) {\n",
       "    return arguments.length ? (size = typeof _ === \"function\" ? _ : constant(+_), symbol) : size;\n",
       "  };\n",
       "\n",
       "  symbol.context = function(_) {\n",
       "    return arguments.length ? (context = _ == null ? null : _, symbol) : context;\n",
       "  };\n",
       "\n",
       "  return symbol;\n",
       "}\n",
       "\n",
       "function noop() {}\n",
       "\n",
       "function point(that, x, y) {\n",
       "  that._context.bezierCurveTo(\n",
       "    (2 * that._x0 + that._x1) / 3,\n",
       "    (2 * that._y0 + that._y1) / 3,\n",
       "    (that._x0 + 2 * that._x1) / 3,\n",
       "    (that._y0 + 2 * that._y1) / 3,\n",
       "    (that._x0 + 4 * that._x1 + x) / 6,\n",
       "    (that._y0 + 4 * that._y1 + y) / 6\n",
       "  );\n",
       "}\n",
       "\n",
       "function Basis(context) {\n",
       "  this._context = context;\n",
       "}\n",
       "\n",
       "Basis.prototype = {\n",
       "  areaStart: function() {\n",
       "    this._line = 0;\n",
       "  },\n",
       "  areaEnd: function() {\n",
       "    this._line = NaN;\n",
       "  },\n",
       "  lineStart: function() {\n",
       "    this._x0 = this._x1 =\n",
       "    this._y0 = this._y1 = NaN;\n",
       "    this._point = 0;\n",
       "  },\n",
       "  lineEnd: function() {\n",
       "    switch (this._point) {\n",
       "      case 3: point(this, this._x1, this._y1); // proceed\n",
       "      case 2: this._context.lineTo(this._x1, this._y1); break;\n",
       "    }\n",
       "    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n",
       "    this._line = 1 - this._line;\n",
       "  },\n",
       "  point: function(x, y) {\n",
       "    x = +x, y = +y;\n",
       "    switch (this._point) {\n",
       "      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n",
       "      case 1: this._point = 2; break;\n",
       "      case 2: this._point = 3; this._context.lineTo((5 * this._x0 + this._x1) / 6, (5 * this._y0 + this._y1) / 6); // proceed\n",
       "      default: point(this, x, y); break;\n",
       "    }\n",
       "    this._x0 = this._x1, this._x1 = x;\n",
       "    this._y0 = this._y1, this._y1 = y;\n",
       "  }\n",
       "};\n",
       "\n",
       "function basis(context) {\n",
       "  return new Basis(context);\n",
       "}\n",
       "\n",
       "function BasisClosed(context) {\n",
       "  this._context = context;\n",
       "}\n",
       "\n",
       "BasisClosed.prototype = {\n",
       "  areaStart: noop,\n",
       "  areaEnd: noop,\n",
       "  lineStart: function() {\n",
       "    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 =\n",
       "    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = NaN;\n",
       "    this._point = 0;\n",
       "  },\n",
       "  lineEnd: function() {\n",
       "    switch (this._point) {\n",
       "      case 1: {\n",
       "        this._context.moveTo(this._x2, this._y2);\n",
       "        this._context.closePath();\n",
       "        break;\n",
       "      }\n",
       "      case 2: {\n",
       "        this._context.moveTo((this._x2 + 2 * this._x3) / 3, (this._y2 + 2 * this._y3) / 3);\n",
       "        this._context.lineTo((this._x3 + 2 * this._x2) / 3, (this._y3 + 2 * this._y2) / 3);\n",
       "        this._context.closePath();\n",
       "        break;\n",
       "      }\n",
       "      case 3: {\n",
       "        this.point(this._x2, this._y2);\n",
       "        this.point(this._x3, this._y3);\n",
       "        this.point(this._x4, this._y4);\n",
       "        break;\n",
       "      }\n",
       "    }\n",
       "  },\n",
       "  point: function(x, y) {\n",
       "    x = +x, y = +y;\n",
       "    switch (this._point) {\n",
       "      case 0: this._point = 1; this._x2 = x, this._y2 = y; break;\n",
       "      case 1: this._point = 2; this._x3 = x, this._y3 = y; break;\n",
       "      case 2: this._point = 3; this._x4 = x, this._y4 = y; this._context.moveTo((this._x0 + 4 * this._x1 + x) / 6, (this._y0 + 4 * this._y1 + y) / 6); break;\n",
       "      default: point(this, x, y); break;\n",
       "    }\n",
       "    this._x0 = this._x1, this._x1 = x;\n",
       "    this._y0 = this._y1, this._y1 = y;\n",
       "  }\n",
       "};\n",
       "\n",
       "function basisClosed(context) {\n",
       "  return new BasisClosed(context);\n",
       "}\n",
       "\n",
       "function BasisOpen(context) {\n",
       "  this._context = context;\n",
       "}\n",
       "\n",
       "BasisOpen.prototype = {\n",
       "  areaStart: function() {\n",
       "    this._line = 0;\n",
       "  },\n",
       "  areaEnd: function() {\n",
       "    this._line = NaN;\n",
       "  },\n",
       "  lineStart: function() {\n",
       "    this._x0 = this._x1 =\n",
       "    this._y0 = this._y1 = NaN;\n",
       "    this._point = 0;\n",
       "  },\n",
       "  lineEnd: function() {\n",
       "    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();\n",
       "    this._line = 1 - this._line;\n",
       "  },\n",
       "  point: function(x, y) {\n",
       "    x = +x, y = +y;\n",
       "    switch (this._point) {\n",
       "      case 0: this._point = 1; break;\n",
       "      case 1: this._point = 2; break;\n",
       "      case 2: this._point = 3; var x0 = (this._x0 + 4 * this._x1 + x) / 6, y0 = (this._y0 + 4 * this._y1 + y) / 6; this._line ? this._context.lineTo(x0, y0) : this._context.moveTo(x0, y0); break;\n",
       "      case 3: this._point = 4; // proceed\n",
       "      default: point(this, x, y); break;\n",
       "    }\n",
       "    this._x0 = this._x1, this._x1 = x;\n",
       "    this._y0 = this._y1, this._y1 = y;\n",
       "  }\n",
       "};\n",
       "\n",
       "function basisOpen(context) {\n",
       "  return new BasisOpen(context);\n",
       "}\n",
       "\n",
       "function Bundle(context, beta) {\n",
       "  this._basis = new Basis(context);\n",
       "  this._beta = beta;\n",
       "}\n",
       "\n",
       "Bundle.prototype = {\n",
       "  lineStart: function() {\n",
       "    this._x = [];\n",
       "    this._y = [];\n",
       "    this._basis.lineStart();\n",
       "  },\n",
       "  lineEnd: function() {\n",
       "    var x = this._x,\n",
       "        y = this._y,\n",
       "        j = x.length - 1;\n",
       "\n",
       "    if (j > 0) {\n",
       "      var x0 = x[0],\n",
       "          y0 = y[0],\n",
       "          dx = x[j] - x0,\n",
       "          dy = y[j] - y0,\n",
       "          i = -1,\n",
       "          t;\n",
       "\n",
       "      while (++i <= j) {\n",
       "        t = i / j;\n",
       "        this._basis.point(\n",
       "          this._beta * x[i] + (1 - this._beta) * (x0 + t * dx),\n",
       "          this._beta * y[i] + (1 - this._beta) * (y0 + t * dy)\n",
       "        );\n",
       "      }\n",
       "    }\n",
       "\n",
       "    this._x = this._y = null;\n",
       "    this._basis.lineEnd();\n",
       "  },\n",
       "  point: function(x, y) {\n",
       "    this._x.push(+x);\n",
       "    this._y.push(+y);\n",
       "  }\n",
       "};\n",
       "\n",
       "var bundle = (function custom(beta) {\n",
       "\n",
       "  function bundle(context) {\n",
       "    return beta === 1 ? new Basis(context) : new Bundle(context, beta);\n",
       "  }\n",
       "\n",
       "  bundle.beta = function(beta) {\n",
       "    return custom(+beta);\n",
       "  };\n",
       "\n",
       "  return bundle;\n",
       "})(0.85);\n",
       "\n",
       "function point$1(that, x, y) {\n",
       "  that._context.bezierCurveTo(\n",
       "    that._x1 + that._k * (that._x2 - that._x0),\n",
       "    that._y1 + that._k * (that._y2 - that._y0),\n",
       "    that._x2 + that._k * (that._x1 - x),\n",
       "    that._y2 + that._k * (that._y1 - y),\n",
       "    that._x2,\n",
       "    that._y2\n",
       "  );\n",
       "}\n",
       "\n",
       "function Cardinal(context, tension) {\n",
       "  this._context = context;\n",
       "  this._k = (1 - tension) / 6;\n",
       "}\n",
       "\n",
       "Cardinal.prototype = {\n",
       "  areaStart: function() {\n",
       "    this._line = 0;\n",
       "  },\n",
       "  areaEnd: function() {\n",
       "    this._line = NaN;\n",
       "  },\n",
       "  lineStart: function() {\n",
       "    this._x0 = this._x1 = this._x2 =\n",
       "    this._y0 = this._y1 = this._y2 = NaN;\n",
       "    this._point = 0;\n",
       "  },\n",
       "  lineEnd: function() {\n",
       "    switch (this._point) {\n",
       "      case 2: this._context.lineTo(this._x2, this._y2); break;\n",
       "      case 3: point$1(this, this._x1, this._y1); break;\n",
       "    }\n",
       "    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n",
       "    this._line = 1 - this._line;\n",
       "  },\n",
       "  point: function(x, y) {\n",
       "    x = +x, y = +y;\n",
       "    switch (this._point) {\n",
       "      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n",
       "      case 1: this._point = 2; this._x1 = x, this._y1 = y; break;\n",
       "      case 2: this._point = 3; // proceed\n",
       "      default: point$1(this, x, y); break;\n",
       "    }\n",
       "    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n",
       "    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n",
       "  }\n",
       "};\n",
       "\n",
       "var cardinal = (function custom(tension) {\n",
       "\n",
       "  function cardinal(context) {\n",
       "    return new Cardinal(context, tension);\n",
       "  }\n",
       "\n",
       "  cardinal.tension = function(tension) {\n",
       "    return custom(+tension);\n",
       "  };\n",
       "\n",
       "  return cardinal;\n",
       "})(0);\n",
       "\n",
       "function CardinalClosed(context, tension) {\n",
       "  this._context = context;\n",
       "  this._k = (1 - tension) / 6;\n",
       "}\n",
       "\n",
       "CardinalClosed.prototype = {\n",
       "  areaStart: noop,\n",
       "  areaEnd: noop,\n",
       "  lineStart: function() {\n",
       "    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =\n",
       "    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;\n",
       "    this._point = 0;\n",
       "  },\n",
       "  lineEnd: function() {\n",
       "    switch (this._point) {\n",
       "      case 1: {\n",
       "        this._context.moveTo(this._x3, this._y3);\n",
       "        this._context.closePath();\n",
       "        break;\n",
       "      }\n",
       "      case 2: {\n",
       "        this._context.lineTo(this._x3, this._y3);\n",
       "        this._context.closePath();\n",
       "        break;\n",
       "      }\n",
       "      case 3: {\n",
       "        this.point(this._x3, this._y3);\n",
       "        this.point(this._x4, this._y4);\n",
       "        this.point(this._x5, this._y5);\n",
       "        break;\n",
       "      }\n",
       "    }\n",
       "  },\n",
       "  point: function(x, y) {\n",
       "    x = +x, y = +y;\n",
       "    switch (this._point) {\n",
       "      case 0: this._point = 1; this._x3 = x, this._y3 = y; break;\n",
       "      case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;\n",
       "      case 2: this._point = 3; this._x5 = x, this._y5 = y; break;\n",
       "      default: point$1(this, x, y); break;\n",
       "    }\n",
       "    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n",
       "    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n",
       "  }\n",
       "};\n",
       "\n",
       "var cardinalClosed = (function custom(tension) {\n",
       "\n",
       "  function cardinal(context) {\n",
       "    return new CardinalClosed(context, tension);\n",
       "  }\n",
       "\n",
       "  cardinal.tension = function(tension) {\n",
       "    return custom(+tension);\n",
       "  };\n",
       "\n",
       "  return cardinal;\n",
       "})(0);\n",
       "\n",
       "function CardinalOpen(context, tension) {\n",
       "  this._context = context;\n",
       "  this._k = (1 - tension) / 6;\n",
       "}\n",
       "\n",
       "CardinalOpen.prototype = {\n",
       "  areaStart: function() {\n",
       "    this._line = 0;\n",
       "  },\n",
       "  areaEnd: function() {\n",
       "    this._line = NaN;\n",
       "  },\n",
       "  lineStart: function() {\n",
       "    this._x0 = this._x1 = this._x2 =\n",
       "    this._y0 = this._y1 = this._y2 = NaN;\n",
       "    this._point = 0;\n",
       "  },\n",
       "  lineEnd: function() {\n",
       "    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();\n",
       "    this._line = 1 - this._line;\n",
       "  },\n",
       "  point: function(x, y) {\n",
       "    x = +x, y = +y;\n",
       "    switch (this._point) {\n",
       "      case 0: this._point = 1; break;\n",
       "      case 1: this._point = 2; break;\n",
       "      case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;\n",
       "      case 3: this._point = 4; // proceed\n",
       "      default: point$1(this, x, y); break;\n",
       "    }\n",
       "    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n",
       "    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n",
       "  }\n",
       "};\n",
       "\n",
       "var cardinalOpen = (function custom(tension) {\n",
       "\n",
       "  function cardinal(context) {\n",
       "    return new CardinalOpen(context, tension);\n",
       "  }\n",
       "\n",
       "  cardinal.tension = function(tension) {\n",
       "    return custom(+tension);\n",
       "  };\n",
       "\n",
       "  return cardinal;\n",
       "})(0);\n",
       "\n",
       "function point$2(that, x, y) {\n",
       "  var x1 = that._x1,\n",
       "      y1 = that._y1,\n",
       "      x2 = that._x2,\n",
       "      y2 = that._y2;\n",
       "\n",
       "  if (that._l01_a > epsilon) {\n",
       "    var a = 2 * that._l01_2a + 3 * that._l01_a * that._l12_a + that._l12_2a,\n",
       "        n = 3 * that._l01_a * (that._l01_a + that._l12_a);\n",
       "    x1 = (x1 * a - that._x0 * that._l12_2a + that._x2 * that._l01_2a) / n;\n",
       "    y1 = (y1 * a - that._y0 * that._l12_2a + that._y2 * that._l01_2a) / n;\n",
       "  }\n",
       "\n",
       "  if (that._l23_a > epsilon) {\n",
       "    var b = 2 * that._l23_2a + 3 * that._l23_a * that._l12_a + that._l12_2a,\n",
       "        m = 3 * that._l23_a * (that._l23_a + that._l12_a);\n",
       "    x2 = (x2 * b + that._x1 * that._l23_2a - x * that._l12_2a) / m;\n",
       "    y2 = (y2 * b + that._y1 * that._l23_2a - y * that._l12_2a) / m;\n",
       "  }\n",
       "\n",
       "  that._context.bezierCurveTo(x1, y1, x2, y2, that._x2, that._y2);\n",
       "}\n",
       "\n",
       "function CatmullRom(context, alpha) {\n",
       "  this._context = context;\n",
       "  this._alpha = alpha;\n",
       "}\n",
       "\n",
       "CatmullRom.prototype = {\n",
       "  areaStart: function() {\n",
       "    this._line = 0;\n",
       "  },\n",
       "  areaEnd: function() {\n",
       "    this._line = NaN;\n",
       "  },\n",
       "  lineStart: function() {\n",
       "    this._x0 = this._x1 = this._x2 =\n",
       "    this._y0 = this._y1 = this._y2 = NaN;\n",
       "    this._l01_a = this._l12_a = this._l23_a =\n",
       "    this._l01_2a = this._l12_2a = this._l23_2a =\n",
       "    this._point = 0;\n",
       "  },\n",
       "  lineEnd: function() {\n",
       "    switch (this._point) {\n",
       "      case 2: this._context.lineTo(this._x2, this._y2); break;\n",
       "      case 3: this.point(this._x2, this._y2); break;\n",
       "    }\n",
       "    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n",
       "    this._line = 1 - this._line;\n",
       "  },\n",
       "  point: function(x, y) {\n",
       "    x = +x, y = +y;\n",
       "\n",
       "    if (this._point) {\n",
       "      var x23 = this._x2 - x,\n",
       "          y23 = this._y2 - y;\n",
       "      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));\n",
       "    }\n",
       "\n",
       "    switch (this._point) {\n",
       "      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n",
       "      case 1: this._point = 2; break;\n",
       "      case 2: this._point = 3; // proceed\n",
       "      default: point$2(this, x, y); break;\n",
       "    }\n",
       "\n",
       "    this._l01_a = this._l12_a, this._l12_a = this._l23_a;\n",
       "    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;\n",
       "    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n",
       "    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n",
       "  }\n",
       "};\n",
       "\n",
       "var catmullRom = (function custom(alpha) {\n",
       "\n",
       "  function catmullRom(context) {\n",
       "    return alpha ? new CatmullRom(context, alpha) : new Cardinal(context, 0);\n",
       "  }\n",
       "\n",
       "  catmullRom.alpha = function(alpha) {\n",
       "    return custom(+alpha);\n",
       "  };\n",
       "\n",
       "  return catmullRom;\n",
       "})(0.5);\n",
       "\n",
       "function CatmullRomClosed(context, alpha) {\n",
       "  this._context = context;\n",
       "  this._alpha = alpha;\n",
       "}\n",
       "\n",
       "CatmullRomClosed.prototype = {\n",
       "  areaStart: noop,\n",
       "  areaEnd: noop,\n",
       "  lineStart: function() {\n",
       "    this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =\n",
       "    this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;\n",
       "    this._l01_a = this._l12_a = this._l23_a =\n",
       "    this._l01_2a = this._l12_2a = this._l23_2a =\n",
       "    this._point = 0;\n",
       "  },\n",
       "  lineEnd: function() {\n",
       "    switch (this._point) {\n",
       "      case 1: {\n",
       "        this._context.moveTo(this._x3, this._y3);\n",
       "        this._context.closePath();\n",
       "        break;\n",
       "      }\n",
       "      case 2: {\n",
       "        this._context.lineTo(this._x3, this._y3);\n",
       "        this._context.closePath();\n",
       "        break;\n",
       "      }\n",
       "      case 3: {\n",
       "        this.point(this._x3, this._y3);\n",
       "        this.point(this._x4, this._y4);\n",
       "        this.point(this._x5, this._y5);\n",
       "        break;\n",
       "      }\n",
       "    }\n",
       "  },\n",
       "  point: function(x, y) {\n",
       "    x = +x, y = +y;\n",
       "\n",
       "    if (this._point) {\n",
       "      var x23 = this._x2 - x,\n",
       "          y23 = this._y2 - y;\n",
       "      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));\n",
       "    }\n",
       "\n",
       "    switch (this._point) {\n",
       "      case 0: this._point = 1; this._x3 = x, this._y3 = y; break;\n",
       "      case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;\n",
       "      case 2: this._point = 3; this._x5 = x, this._y5 = y; break;\n",
       "      default: point$2(this, x, y); break;\n",
       "    }\n",
       "\n",
       "    this._l01_a = this._l12_a, this._l12_a = this._l23_a;\n",
       "    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;\n",
       "    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n",
       "    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n",
       "  }\n",
       "};\n",
       "\n",
       "var catmullRomClosed = (function custom(alpha) {\n",
       "\n",
       "  function catmullRom(context) {\n",
       "    return alpha ? new CatmullRomClosed(context, alpha) : new CardinalClosed(context, 0);\n",
       "  }\n",
       "\n",
       "  catmullRom.alpha = function(alpha) {\n",
       "    return custom(+alpha);\n",
       "  };\n",
       "\n",
       "  return catmullRom;\n",
       "})(0.5);\n",
       "\n",
       "function CatmullRomOpen(context, alpha) {\n",
       "  this._context = context;\n",
       "  this._alpha = alpha;\n",
       "}\n",
       "\n",
       "CatmullRomOpen.prototype = {\n",
       "  areaStart: function() {\n",
       "    this._line = 0;\n",
       "  },\n",
       "  areaEnd: function() {\n",
       "    this._line = NaN;\n",
       "  },\n",
       "  lineStart: function() {\n",
       "    this._x0 = this._x1 = this._x2 =\n",
       "    this._y0 = this._y1 = this._y2 = NaN;\n",
       "    this._l01_a = this._l12_a = this._l23_a =\n",
       "    this._l01_2a = this._l12_2a = this._l23_2a =\n",
       "    this._point = 0;\n",
       "  },\n",
       "  lineEnd: function() {\n",
       "    if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();\n",
       "    this._line = 1 - this._line;\n",
       "  },\n",
       "  point: function(x, y) {\n",
       "    x = +x, y = +y;\n",
       "\n",
       "    if (this._point) {\n",
       "      var x23 = this._x2 - x,\n",
       "          y23 = this._y2 - y;\n",
       "      this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));\n",
       "    }\n",
       "\n",
       "    switch (this._point) {\n",
       "      case 0: this._point = 1; break;\n",
       "      case 1: this._point = 2; break;\n",
       "      case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;\n",
       "      case 3: this._point = 4; // proceed\n",
       "      default: point$2(this, x, y); break;\n",
       "    }\n",
       "\n",
       "    this._l01_a = this._l12_a, this._l12_a = this._l23_a;\n",
       "    this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;\n",
       "    this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;\n",
       "    this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;\n",
       "  }\n",
       "};\n",
       "\n",
       "var catmullRomOpen = (function custom(alpha) {\n",
       "\n",
       "  function catmullRom(context) {\n",
       "    return alpha ? new CatmullRomOpen(context, alpha) : new CardinalOpen(context, 0);\n",
       "  }\n",
       "\n",
       "  catmullRom.alpha = function(alpha) {\n",
       "    return custom(+alpha);\n",
       "  };\n",
       "\n",
       "  return catmullRom;\n",
       "})(0.5);\n",
       "\n",
       "function LinearClosed(context) {\n",
       "  this._context = context;\n",
       "}\n",
       "\n",
       "LinearClosed.prototype = {\n",
       "  areaStart: noop,\n",
       "  areaEnd: noop,\n",
       "  lineStart: function() {\n",
       "    this._point = 0;\n",
       "  },\n",
       "  lineEnd: function() {\n",
       "    if (this._point) this._context.closePath();\n",
       "  },\n",
       "  point: function(x, y) {\n",
       "    x = +x, y = +y;\n",
       "    if (this._point) this._context.lineTo(x, y);\n",
       "    else this._point = 1, this._context.moveTo(x, y);\n",
       "  }\n",
       "};\n",
       "\n",
       "function linearClosed(context) {\n",
       "  return new LinearClosed(context);\n",
       "}\n",
       "\n",
       "function sign(x) {\n",
       "  return x < 0 ? -1 : 1;\n",
       "}\n",
       "\n",
       "// Calculate the slopes of the tangents (Hermite-type interpolation) based on\n",
       "// the following paper: Steffen, M. 1990. A Simple Method for Monotonic\n",
       "// Interpolation in One Dimension. Astronomy and Astrophysics, Vol. 239, NO.\n",
       "// NOV(II), P. 443, 1990.\n",
       "function slope3(that, x2, y2) {\n",
       "  var h0 = that._x1 - that._x0,\n",
       "      h1 = x2 - that._x1,\n",
       "      s0 = (that._y1 - that._y0) / (h0 || h1 < 0 && -0),\n",
       "      s1 = (y2 - that._y1) / (h1 || h0 < 0 && -0),\n",
       "      p = (s0 * h1 + s1 * h0) / (h0 + h1);\n",
       "  return (sign(s0) + sign(s1)) * Math.min(Math.abs(s0), Math.abs(s1), 0.5 * Math.abs(p)) || 0;\n",
       "}\n",
       "\n",
       "// Calculate a one-sided slope.\n",
       "function slope2(that, t) {\n",
       "  var h = that._x1 - that._x0;\n",
       "  return h ? (3 * (that._y1 - that._y0) / h - t) / 2 : t;\n",
       "}\n",
       "\n",
       "// According to https://en.wikipedia.org/wiki/Cubic_Hermite_spline#Representations\n",
       "// \"you can express cubic Hermite interpolation in terms of cubic B'ezier curves\n",
       "// with respect to the four values p0, p0 + m0 / 3, p1 - m1 / 3, p1\".\n",
       "function point$3(that, t0, t1) {\n",
       "  var x0 = that._x0,\n",
       "      y0 = that._y0,\n",
       "      x1 = that._x1,\n",
       "      y1 = that._y1,\n",
       "      dx = (x1 - x0) / 3;\n",
       "  that._context.bezierCurveTo(x0 + dx, y0 + dx * t0, x1 - dx, y1 - dx * t1, x1, y1);\n",
       "}\n",
       "\n",
       "function MonotoneX(context) {\n",
       "  this._context = context;\n",
       "}\n",
       "\n",
       "MonotoneX.prototype = {\n",
       "  areaStart: function() {\n",
       "    this._line = 0;\n",
       "  },\n",
       "  areaEnd: function() {\n",
       "    this._line = NaN;\n",
       "  },\n",
       "  lineStart: function() {\n",
       "    this._x0 = this._x1 =\n",
       "    this._y0 = this._y1 =\n",
       "    this._t0 = NaN;\n",
       "    this._point = 0;\n",
       "  },\n",
       "  lineEnd: function() {\n",
       "    switch (this._point) {\n",
       "      case 2: this._context.lineTo(this._x1, this._y1); break;\n",
       "      case 3: point$3(this, this._t0, slope2(this, this._t0)); break;\n",
       "    }\n",
       "    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n",
       "    this._line = 1 - this._line;\n",
       "  },\n",
       "  point: function(x, y) {\n",
       "    var t1 = NaN;\n",
       "\n",
       "    x = +x, y = +y;\n",
       "    if (x === this._x1 && y === this._y1) return; // Ignore coincident points.\n",
       "    switch (this._point) {\n",
       "      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n",
       "      case 1: this._point = 2; break;\n",
       "      case 2: this._point = 3; point$3(this, slope2(this, t1 = slope3(this, x, y)), t1); break;\n",
       "      default: point$3(this, this._t0, t1 = slope3(this, x, y)); break;\n",
       "    }\n",
       "\n",
       "    this._x0 = this._x1, this._x1 = x;\n",
       "    this._y0 = this._y1, this._y1 = y;\n",
       "    this._t0 = t1;\n",
       "  }\n",
       "};\n",
       "\n",
       "function MonotoneY(context) {\n",
       "  this._context = new ReflectContext(context);\n",
       "}\n",
       "\n",
       "(MonotoneY.prototype = Object.create(MonotoneX.prototype)).point = function(x, y) {\n",
       "  MonotoneX.prototype.point.call(this, y, x);\n",
       "};\n",
       "\n",
       "function ReflectContext(context) {\n",
       "  this._context = context;\n",
       "}\n",
       "\n",
       "ReflectContext.prototype = {\n",
       "  moveTo: function(x, y) { this._context.moveTo(y, x); },\n",
       "  closePath: function() { this._context.closePath(); },\n",
       "  lineTo: function(x, y) { this._context.lineTo(y, x); },\n",
       "  bezierCurveTo: function(x1, y1, x2, y2, x, y) { this._context.bezierCurveTo(y1, x1, y2, x2, y, x); }\n",
       "};\n",
       "\n",
       "function monotoneX(context) {\n",
       "  return new MonotoneX(context);\n",
       "}\n",
       "\n",
       "function monotoneY(context) {\n",
       "  return new MonotoneY(context);\n",
       "}\n",
       "\n",
       "function Natural(context) {\n",
       "  this._context = context;\n",
       "}\n",
       "\n",
       "Natural.prototype = {\n",
       "  areaStart: function() {\n",
       "    this._line = 0;\n",
       "  },\n",
       "  areaEnd: function() {\n",
       "    this._line = NaN;\n",
       "  },\n",
       "  lineStart: function() {\n",
       "    this._x = [];\n",
       "    this._y = [];\n",
       "  },\n",
       "  lineEnd: function() {\n",
       "    var x = this._x,\n",
       "        y = this._y,\n",
       "        n = x.length;\n",
       "\n",
       "    if (n) {\n",
       "      this._line ? this._context.lineTo(x[0], y[0]) : this._context.moveTo(x[0], y[0]);\n",
       "      if (n === 2) {\n",
       "        this._context.lineTo(x[1], y[1]);\n",
       "      } else {\n",
       "        var px = controlPoints(x),\n",
       "            py = controlPoints(y);\n",
       "        for (var i0 = 0, i1 = 1; i1 < n; ++i0, ++i1) {\n",
       "          this._context.bezierCurveTo(px[0][i0], py[0][i0], px[1][i0], py[1][i0], x[i1], y[i1]);\n",
       "        }\n",
       "      }\n",
       "    }\n",
       "\n",
       "    if (this._line || (this._line !== 0 && n === 1)) this._context.closePath();\n",
       "    this._line = 1 - this._line;\n",
       "    this._x = this._y = null;\n",
       "  },\n",
       "  point: function(x, y) {\n",
       "    this._x.push(+x);\n",
       "    this._y.push(+y);\n",
       "  }\n",
       "};\n",
       "\n",
       "// See https://www.particleincell.com/2012/bezier-splines/ for derivation.\n",
       "function controlPoints(x) {\n",
       "  var i,\n",
       "      n = x.length - 1,\n",
       "      m,\n",
       "      a = new Array(n),\n",
       "      b = new Array(n),\n",
       "      r = new Array(n);\n",
       "  a[0] = 0, b[0] = 2, r[0] = x[0] + 2 * x[1];\n",
       "  for (i = 1; i < n - 1; ++i) a[i] = 1, b[i] = 4, r[i] = 4 * x[i] + 2 * x[i + 1];\n",
       "  a[n - 1] = 2, b[n - 1] = 7, r[n - 1] = 8 * x[n - 1] + x[n];\n",
       "  for (i = 1; i < n; ++i) m = a[i] / b[i - 1], b[i] -= m, r[i] -= m * r[i - 1];\n",
       "  a[n - 1] = r[n - 1] / b[n - 1];\n",
       "  for (i = n - 2; i >= 0; --i) a[i] = (r[i] - a[i + 1]) / b[i];\n",
       "  b[n - 1] = (x[n] + a[n - 1]) / 2;\n",
       "  for (i = 0; i < n - 1; ++i) b[i] = 2 * x[i + 1] - a[i + 1];\n",
       "  return [a, b];\n",
       "}\n",
       "\n",
       "function natural(context) {\n",
       "  return new Natural(context);\n",
       "}\n",
       "\n",
       "function Step(context, t) {\n",
       "  this._context = context;\n",
       "  this._t = t;\n",
       "}\n",
       "\n",
       "Step.prototype = {\n",
       "  areaStart: function() {\n",
       "    this._line = 0;\n",
       "  },\n",
       "  areaEnd: function() {\n",
       "    this._line = NaN;\n",
       "  },\n",
       "  lineStart: function() {\n",
       "    this._x = this._y = NaN;\n",
       "    this._point = 0;\n",
       "  },\n",
       "  lineEnd: function() {\n",
       "    if (0 < this._t && this._t < 1 && this._point === 2) this._context.lineTo(this._x, this._y);\n",
       "    if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();\n",
       "    if (this._line >= 0) this._t = 1 - this._t, this._line = 1 - this._line;\n",
       "  },\n",
       "  point: function(x, y) {\n",
       "    x = +x, y = +y;\n",
       "    switch (this._point) {\n",
       "      case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;\n",
       "      case 1: this._point = 2; // proceed\n",
       "      default: {\n",
       "        if (this._t <= 0) {\n",
       "          this._context.lineTo(this._x, y);\n",
       "          this._context.lineTo(x, y);\n",
       "        } else {\n",
       "          var x1 = this._x * (1 - this._t) + x * this._t;\n",
       "          this._context.lineTo(x1, this._y);\n",
       "          this._context.lineTo(x1, y);\n",
       "        }\n",
       "        break;\n",
       "      }\n",
       "    }\n",
       "    this._x = x, this._y = y;\n",
       "  }\n",
       "};\n",
       "\n",
       "function step(context) {\n",
       "  return new Step(context, 0.5);\n",
       "}\n",
       "\n",
       "function stepBefore(context) {\n",
       "  return new Step(context, 0);\n",
       "}\n",
       "\n",
       "function stepAfter(context) {\n",
       "  return new Step(context, 1);\n",
       "}\n",
       "\n",
       "function none(series, order) {\n",
       "  if (!((n = series.length) > 1)) return;\n",
       "  for (var i = 1, j, s0, s1 = series[order[0]], n, m = s1.length; i < n; ++i) {\n",
       "    s0 = s1, s1 = series[order[i]];\n",
       "    for (j = 0; j < m; ++j) {\n",
       "      s1[j][1] += s1[j][0] = isNaN(s0[j][1]) ? s0[j][0] : s0[j][1];\n",
       "    }\n",
       "  }\n",
       "}\n",
       "\n",
       "function none$1(series) {\n",
       "  var n = series.length, o = new Array(n);\n",
       "  while (--n >= 0) o[n] = n;\n",
       "  return o;\n",
       "}\n",
       "\n",
       "function stackValue(d, key) {\n",
       "  return d[key];\n",
       "}\n",
       "\n",
       "function stack() {\n",
       "  var keys = constant([]),\n",
       "      order = none$1,\n",
       "      offset = none,\n",
       "      value = stackValue;\n",
       "\n",
       "  function stack(data) {\n",
       "    var kz = keys.apply(this, arguments),\n",
       "        i,\n",
       "        m = data.length,\n",
       "        n = kz.length,\n",
       "        sz = new Array(n),\n",
       "        oz;\n",
       "\n",
       "    for (i = 0; i < n; ++i) {\n",
       "      for (var ki = kz[i], si = sz[i] = new Array(m), j = 0, sij; j < m; ++j) {\n",
       "        si[j] = sij = [0, +value(data[j], ki, j, data)];\n",
       "        sij.data = data[j];\n",
       "      }\n",
       "      si.key = ki;\n",
       "    }\n",
       "\n",
       "    for (i = 0, oz = order(sz); i < n; ++i) {\n",
       "      sz[oz[i]].index = i;\n",
       "    }\n",
       "\n",
       "    offset(sz, oz);\n",
       "    return sz;\n",
       "  }\n",
       "\n",
       "  stack.keys = function(_) {\n",
       "    return arguments.length ? (keys = typeof _ === \"function\" ? _ : constant(slice.call(_)), stack) : keys;\n",
       "  };\n",
       "\n",
       "  stack.value = function(_) {\n",
       "    return arguments.length ? (value = typeof _ === \"function\" ? _ : constant(+_), stack) : value;\n",
       "  };\n",
       "\n",
       "  stack.order = function(_) {\n",
       "    return arguments.length ? (order = _ == null ? none$1 : typeof _ === \"function\" ? _ : constant(slice.call(_)), stack) : order;\n",
       "  };\n",
       "\n",
       "  stack.offset = function(_) {\n",
       "    return arguments.length ? (offset = _ == null ? none : _, stack) : offset;\n",
       "  };\n",
       "\n",
       "  return stack;\n",
       "}\n",
       "\n",
       "function expand(series, order) {\n",
       "  if (!((n = series.length) > 0)) return;\n",
       "  for (var i, n, j = 0, m = series[0].length, y; j < m; ++j) {\n",
       "    for (y = i = 0; i < n; ++i) y += series[i][j][1] || 0;\n",
       "    if (y) for (i = 0; i < n; ++i) series[i][j][1] /= y;\n",
       "  }\n",
       "  none(series, order);\n",
       "}\n",
       "\n",
       "function diverging(series, order) {\n",
       "  if (!((n = series.length) > 0)) return;\n",
       "  for (var i, j = 0, d, dy, yp, yn, n, m = series[order[0]].length; j < m; ++j) {\n",
       "    for (yp = yn = 0, i = 0; i < n; ++i) {\n",
       "      if ((dy = (d = series[order[i]][j])[1] - d[0]) > 0) {\n",
       "        d[0] = yp, d[1] = yp += dy;\n",
       "      } else if (dy < 0) {\n",
       "        d[1] = yn, d[0] = yn += dy;\n",
       "      } else {\n",
       "        d[0] = 0, d[1] = dy;\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "}\n",
       "\n",
       "function silhouette(series, order) {\n",
       "  if (!((n = series.length) > 0)) return;\n",
       "  for (var j = 0, s0 = series[order[0]], n, m = s0.length; j < m; ++j) {\n",
       "    for (var i = 0, y = 0; i < n; ++i) y += series[i][j][1] || 0;\n",
       "    s0[j][1] += s0[j][0] = -y / 2;\n",
       "  }\n",
       "  none(series, order);\n",
       "}\n",
       "\n",
       "function wiggle(series, order) {\n",
       "  if (!((n = series.length) > 0) || !((m = (s0 = series[order[0]]).length) > 0)) return;\n",
       "  for (var y = 0, j = 1, s0, m, n; j < m; ++j) {\n",
       "    for (var i = 0, s1 = 0, s2 = 0; i < n; ++i) {\n",
       "      var si = series[order[i]],\n",
       "          sij0 = si[j][1] || 0,\n",
       "          sij1 = si[j - 1][1] || 0,\n",
       "          s3 = (sij0 - sij1) / 2;\n",
       "      for (var k = 0; k < i; ++k) {\n",
       "        var sk = series[order[k]],\n",
       "            skj0 = sk[j][1] || 0,\n",
       "            skj1 = sk[j - 1][1] || 0;\n",
       "        s3 += skj0 - skj1;\n",
       "      }\n",
       "      s1 += sij0, s2 += s3 * sij0;\n",
       "    }\n",
       "    s0[j - 1][1] += s0[j - 1][0] = y;\n",
       "    if (s1) y -= s2 / s1;\n",
       "  }\n",
       "  s0[j - 1][1] += s0[j - 1][0] = y;\n",
       "  none(series, order);\n",
       "}\n",
       "\n",
       "function appearance(series) {\n",
       "  var peaks = series.map(peak);\n",
       "  return none$1(series).sort(function(a, b) { return peaks[a] - peaks[b]; });\n",
       "}\n",
       "\n",
       "function peak(series) {\n",
       "  var i = -1, j = 0, n = series.length, vi, vj = -Infinity;\n",
       "  while (++i < n) if ((vi = +series[i][1]) > vj) vj = vi, j = i;\n",
       "  return j;\n",
       "}\n",
       "\n",
       "function ascending(series) {\n",
       "  var sums = series.map(sum);\n",
       "  return none$1(series).sort(function(a, b) { return sums[a] - sums[b]; });\n",
       "}\n",
       "\n",
       "function sum(series) {\n",
       "  var s = 0, i = -1, n = series.length, v;\n",
       "  while (++i < n) if (v = +series[i][1]) s += v;\n",
       "  return s;\n",
       "}\n",
       "\n",
       "function descending$1(series) {\n",
       "  return ascending(series).reverse();\n",
       "}\n",
       "\n",
       "function insideOut(series) {\n",
       "  var n = series.length,\n",
       "      i,\n",
       "      j,\n",
       "      sums = series.map(sum),\n",
       "      order = appearance(series),\n",
       "      top = 0,\n",
       "      bottom = 0,\n",
       "      tops = [],\n",
       "      bottoms = [];\n",
       "\n",
       "  for (i = 0; i < n; ++i) {\n",
       "    j = order[i];\n",
       "    if (top < bottom) {\n",
       "      top += sums[j];\n",
       "      tops.push(j);\n",
       "    } else {\n",
       "      bottom += sums[j];\n",
       "      bottoms.push(j);\n",
       "    }\n",
       "  }\n",
       "\n",
       "  return bottoms.reverse().concat(tops);\n",
       "}\n",
       "\n",
       "function reverse(series) {\n",
       "  return none$1(series).reverse();\n",
       "}\n",
       "\n",
       "exports.arc = arc;\n",
       "exports.area = area;\n",
       "exports.areaRadial = areaRadial;\n",
       "exports.curveBasis = basis;\n",
       "exports.curveBasisClosed = basisClosed;\n",
       "exports.curveBasisOpen = basisOpen;\n",
       "exports.curveBundle = bundle;\n",
       "exports.curveCardinal = cardinal;\n",
       "exports.curveCardinalClosed = cardinalClosed;\n",
       "exports.curveCardinalOpen = cardinalOpen;\n",
       "exports.curveCatmullRom = catmullRom;\n",
       "exports.curveCatmullRomClosed = catmullRomClosed;\n",
       "exports.curveCatmullRomOpen = catmullRomOpen;\n",
       "exports.curveLinear = curveLinear;\n",
       "exports.curveLinearClosed = linearClosed;\n",
       "exports.curveMonotoneX = monotoneX;\n",
       "exports.curveMonotoneY = monotoneY;\n",
       "exports.curveNatural = natural;\n",
       "exports.curveStep = step;\n",
       "exports.curveStepAfter = stepAfter;\n",
       "exports.curveStepBefore = stepBefore;\n",
       "exports.line = line;\n",
       "exports.lineRadial = lineRadial$1;\n",
       "exports.linkHorizontal = linkHorizontal;\n",
       "exports.linkRadial = linkRadial;\n",
       "exports.linkVertical = linkVertical;\n",
       "exports.pie = pie;\n",
       "exports.pointRadial = pointRadial;\n",
       "exports.radialArea = areaRadial;\n",
       "exports.radialLine = lineRadial$1;\n",
       "exports.stack = stack;\n",
       "exports.stackOffsetDiverging = diverging;\n",
       "exports.stackOffsetExpand = expand;\n",
       "exports.stackOffsetNone = none;\n",
       "exports.stackOffsetSilhouette = silhouette;\n",
       "exports.stackOffsetWiggle = wiggle;\n",
       "exports.stackOrderAppearance = appearance;\n",
       "exports.stackOrderAscending = ascending;\n",
       "exports.stackOrderDescending = descending$1;\n",
       "exports.stackOrderInsideOut = insideOut;\n",
       "exports.stackOrderNone = none$1;\n",
       "exports.stackOrderReverse = reverse;\n",
       "exports.symbol = symbol;\n",
       "exports.symbolCircle = circle;\n",
       "exports.symbolCross = cross;\n",
       "exports.symbolDiamond = diamond;\n",
       "exports.symbolSquare = square;\n",
       "exports.symbolStar = star;\n",
       "exports.symbolTriangle = triangle;\n",
       "exports.symbolWye = wye;\n",
       "exports.symbols = symbols;\n",
       "\n",
       "Object.defineProperty(exports, '__esModule', { value: true });\n",
       "\n",
       "}));\n",
       "\n",
       "},{\"d3-path\":9}],13:[function(require,module,exports){\n",
       "// https://d3js.org/d3-time-format/ v2.2.2 Copyright 2019 Mike Bostock\n",
       "(function (global, factory) {\n",
       "typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-time')) :\n",
       "typeof define === 'function' && define.amd ? define(['exports', 'd3-time'], factory) :\n",
       "(global = global || self, factory(global.d3 = global.d3 || {}, global.d3));\n",
       "}(this, function (exports, d3Time) { 'use strict';\n",
       "\n",
       "function localDate(d) {\n",
       "  if (0 <= d.y && d.y < 100) {\n",
       "    var date = new Date(-1, d.m, d.d, d.H, d.M, d.S, d.L);\n",
       "    date.setFullYear(d.y);\n",
       "    return date;\n",
       "  }\n",
       "  return new Date(d.y, d.m, d.d, d.H, d.M, d.S, d.L);\n",
       "}\n",
       "\n",
       "function utcDate(d) {\n",
       "  if (0 <= d.y && d.y < 100) {\n",
       "    var date = new Date(Date.UTC(-1, d.m, d.d, d.H, d.M, d.S, d.L));\n",
       "    date.setUTCFullYear(d.y);\n",
       "    return date;\n",
       "  }\n",
       "  return new Date(Date.UTC(d.y, d.m, d.d, d.H, d.M, d.S, d.L));\n",
       "}\n",
       "\n",
       "function newDate(y, m, d) {\n",
       "  return {y: y, m: m, d: d, H: 0, M: 0, S: 0, L: 0};\n",
       "}\n",
       "\n",
       "function formatLocale(locale) {\n",
       "  var locale_dateTime = locale.dateTime,\n",
       "      locale_date = locale.date,\n",
       "      locale_time = locale.time,\n",
       "      locale_periods = locale.periods,\n",
       "      locale_weekdays = locale.days,\n",
       "      locale_shortWeekdays = locale.shortDays,\n",
       "      locale_months = locale.months,\n",
       "      locale_shortMonths = locale.shortMonths;\n",
       "\n",
       "  var periodRe = formatRe(locale_periods),\n",
       "      periodLookup = formatLookup(locale_periods),\n",
       "      weekdayRe = formatRe(locale_weekdays),\n",
       "      weekdayLookup = formatLookup(locale_weekdays),\n",
       "      shortWeekdayRe = formatRe(locale_shortWeekdays),\n",
       "      shortWeekdayLookup = formatLookup(locale_shortWeekdays),\n",
       "      monthRe = formatRe(locale_months),\n",
       "      monthLookup = formatLookup(locale_months),\n",
       "      shortMonthRe = formatRe(locale_shortMonths),\n",
       "      shortMonthLookup = formatLookup(locale_shortMonths);\n",
       "\n",
       "  var formats = {\n",
       "    \"a\": formatShortWeekday,\n",
       "    \"A\": formatWeekday,\n",
       "    \"b\": formatShortMonth,\n",
       "    \"B\": formatMonth,\n",
       "    \"c\": null,\n",
       "    \"d\": formatDayOfMonth,\n",
       "    \"e\": formatDayOfMonth,\n",
       "    \"f\": formatMicroseconds,\n",
       "    \"H\": formatHour24,\n",
       "    \"I\": formatHour12,\n",
       "    \"j\": formatDayOfYear,\n",
       "    \"L\": formatMilliseconds,\n",
       "    \"m\": formatMonthNumber,\n",
       "    \"M\": formatMinutes,\n",
       "    \"p\": formatPeriod,\n",
       "    \"q\": formatQuarter,\n",
       "    \"Q\": formatUnixTimestamp,\n",
       "    \"s\": formatUnixTimestampSeconds,\n",
       "    \"S\": formatSeconds,\n",
       "    \"u\": formatWeekdayNumberMonday,\n",
       "    \"U\": formatWeekNumberSunday,\n",
       "    \"V\": formatWeekNumberISO,\n",
       "    \"w\": formatWeekdayNumberSunday,\n",
       "    \"W\": formatWeekNumberMonday,\n",
       "    \"x\": null,\n",
       "    \"X\": null,\n",
       "    \"y\": formatYear,\n",
       "    \"Y\": formatFullYear,\n",
       "    \"Z\": formatZone,\n",
       "    \"%\": formatLiteralPercent\n",
       "  };\n",
       "\n",
       "  var utcFormats = {\n",
       "    \"a\": formatUTCShortWeekday,\n",
       "    \"A\": formatUTCWeekday,\n",
       "    \"b\": formatUTCShortMonth,\n",
       "    \"B\": formatUTCMonth,\n",
       "    \"c\": null,\n",
       "    \"d\": formatUTCDayOfMonth,\n",
       "    \"e\": formatUTCDayOfMonth,\n",
       "    \"f\": formatUTCMicroseconds,\n",
       "    \"H\": formatUTCHour24,\n",
       "    \"I\": formatUTCHour12,\n",
       "    \"j\": formatUTCDayOfYear,\n",
       "    \"L\": formatUTCMilliseconds,\n",
       "    \"m\": formatUTCMonthNumber,\n",
       "    \"M\": formatUTCMinutes,\n",
       "    \"p\": formatUTCPeriod,\n",
       "    \"q\": formatUTCQuarter,\n",
       "    \"Q\": formatUnixTimestamp,\n",
       "    \"s\": formatUnixTimestampSeconds,\n",
       "    \"S\": formatUTCSeconds,\n",
       "    \"u\": formatUTCWeekdayNumberMonday,\n",
       "    \"U\": formatUTCWeekNumberSunday,\n",
       "    \"V\": formatUTCWeekNumberISO,\n",
       "    \"w\": formatUTCWeekdayNumberSunday,\n",
       "    \"W\": formatUTCWeekNumberMonday,\n",
       "    \"x\": null,\n",
       "    \"X\": null,\n",
       "    \"y\": formatUTCYear,\n",
       "    \"Y\": formatUTCFullYear,\n",
       "    \"Z\": formatUTCZone,\n",
       "    \"%\": formatLiteralPercent\n",
       "  };\n",
       "\n",
       "  var parses = {\n",
       "    \"a\": parseShortWeekday,\n",
       "    \"A\": parseWeekday,\n",
       "    \"b\": parseShortMonth,\n",
       "    \"B\": parseMonth,\n",
       "    \"c\": parseLocaleDateTime,\n",
       "    \"d\": parseDayOfMonth,\n",
       "    \"e\": parseDayOfMonth,\n",
       "    \"f\": parseMicroseconds,\n",
       "    \"H\": parseHour24,\n",
       "    \"I\": parseHour24,\n",
       "    \"j\": parseDayOfYear,\n",
       "    \"L\": parseMilliseconds,\n",
       "    \"m\": parseMonthNumber,\n",
       "    \"M\": parseMinutes,\n",
       "    \"p\": parsePeriod,\n",
       "    \"q\": parseQuarter,\n",
       "    \"Q\": parseUnixTimestamp,\n",
       "    \"s\": parseUnixTimestampSeconds,\n",
       "    \"S\": parseSeconds,\n",
       "    \"u\": parseWeekdayNumberMonday,\n",
       "    \"U\": parseWeekNumberSunday,\n",
       "    \"V\": parseWeekNumberISO,\n",
       "    \"w\": parseWeekdayNumberSunday,\n",
       "    \"W\": parseWeekNumberMonday,\n",
       "    \"x\": parseLocaleDate,\n",
       "    \"X\": parseLocaleTime,\n",
       "    \"y\": parseYear,\n",
       "    \"Y\": parseFullYear,\n",
       "    \"Z\": parseZone,\n",
       "    \"%\": parseLiteralPercent\n",
       "  };\n",
       "\n",
       "  // These recursive directive definitions must be deferred.\n",
       "  formats.x = newFormat(locale_date, formats);\n",
       "  formats.X = newFormat(locale_time, formats);\n",
       "  formats.c = newFormat(locale_dateTime, formats);\n",
       "  utcFormats.x = newFormat(locale_date, utcFormats);\n",
       "  utcFormats.X = newFormat(locale_time, utcFormats);\n",
       "  utcFormats.c = newFormat(locale_dateTime, utcFormats);\n",
       "\n",
       "  function newFormat(specifier, formats) {\n",
       "    return function(date) {\n",
       "      var string = [],\n",
       "          i = -1,\n",
       "          j = 0,\n",
       "          n = specifier.length,\n",
       "          c,\n",
       "          pad,\n",
       "          format;\n",
       "\n",
       "      if (!(date instanceof Date)) date = new Date(+date);\n",
       "\n",
       "      while (++i < n) {\n",
       "        if (specifier.charCodeAt(i) === 37) {\n",
       "          string.push(specifier.slice(j, i));\n",
       "          if ((pad = pads[c = specifier.charAt(++i)]) != null) c = specifier.charAt(++i);\n",
       "          else pad = c === \"e\" ? \" \" : \"0\";\n",
       "          if (format = formats[c]) c = format(date, pad);\n",
       "          string.push(c);\n",
       "          j = i + 1;\n",
       "        }\n",
       "      }\n",
       "\n",
       "      string.push(specifier.slice(j, i));\n",
       "      return string.join(\"\");\n",
       "    };\n",
       "  }\n",
       "\n",
       "  function newParse(specifier, Z) {\n",
       "    return function(string) {\n",
       "      var d = newDate(1900, undefined, 1),\n",
       "          i = parseSpecifier(d, specifier, string += \"\", 0),\n",
       "          week, day;\n",
       "      if (i != string.length) return null;\n",
       "\n",
       "      // If a UNIX timestamp is specified, return it.\n",
       "      if (\"Q\" in d) return new Date(d.Q);\n",
       "      if (\"s\" in d) return new Date(d.s * 1000 + (\"L\" in d ? d.L : 0));\n",
       "\n",
       "      // If this is utcParse, never use the local timezone.\n",
       "      if (Z && !(\"Z\" in d)) d.Z = 0;\n",
       "\n",
       "      // The am-pm flag is 0 for AM, and 1 for PM.\n",
       "      if (\"p\" in d) d.H = d.H % 12 + d.p * 12;\n",
       "\n",
       "      // If the month was not specified, inherit from the quarter.\n",
       "      if (d.m === undefined) d.m = \"q\" in d ? d.q : 0;\n",
       "\n",
       "      // Convert day-of-week and week-of-year to day-of-year.\n",
       "      if (\"V\" in d) {\n",
       "        if (d.V < 1 || d.V > 53) return null;\n",
       "        if (!(\"w\" in d)) d.w = 1;\n",
       "        if (\"Z\" in d) {\n",
       "          week = utcDate(newDate(d.y, 0, 1)), day = week.getUTCDay();\n",
       "          week = day > 4 || day === 0 ? d3Time.utcMonday.ceil(week) : d3Time.utcMonday(week);\n",
       "          week = d3Time.utcDay.offset(week, (d.V - 1) * 7);\n",
       "          d.y = week.getUTCFullYear();\n",
       "          d.m = week.getUTCMonth();\n",
       "          d.d = week.getUTCDate() + (d.w + 6) % 7;\n",
       "        } else {\n",
       "          week = localDate(newDate(d.y, 0, 1)), day = week.getDay();\n",
       "          week = day > 4 || day === 0 ? d3Time.timeMonday.ceil(week) : d3Time.timeMonday(week);\n",
       "          week = d3Time.timeDay.offset(week, (d.V - 1) * 7);\n",
       "          d.y = week.getFullYear();\n",
       "          d.m = week.getMonth();\n",
       "          d.d = week.getDate() + (d.w + 6) % 7;\n",
       "        }\n",
       "      } else if (\"W\" in d || \"U\" in d) {\n",
       "        if (!(\"w\" in d)) d.w = \"u\" in d ? d.u % 7 : \"W\" in d ? 1 : 0;\n",
       "        day = \"Z\" in d ? utcDate(newDate(d.y, 0, 1)).getUTCDay() : localDate(newDate(d.y, 0, 1)).getDay();\n",
       "        d.m = 0;\n",
       "        d.d = \"W\" in d ? (d.w + 6) % 7 + d.W * 7 - (day + 5) % 7 : d.w + d.U * 7 - (day + 6) % 7;\n",
       "      }\n",
       "\n",
       "      // If a time zone is specified, all fields are interpreted as UTC and then\n",
       "      // offset according to the specified time zone.\n",
       "      if (\"Z\" in d) {\n",
       "        d.H += d.Z / 100 | 0;\n",
       "        d.M += d.Z % 100;\n",
       "        return utcDate(d);\n",
       "      }\n",
       "\n",
       "      // Otherwise, all fields are in local time.\n",
       "      return localDate(d);\n",
       "    };\n",
       "  }\n",
       "\n",
       "  function parseSpecifier(d, specifier, string, j) {\n",
       "    var i = 0,\n",
       "        n = specifier.length,\n",
       "        m = string.length,\n",
       "        c,\n",
       "        parse;\n",
       "\n",
       "    while (i < n) {\n",
       "      if (j >= m) return -1;\n",
       "      c = specifier.charCodeAt(i++);\n",
       "      if (c === 37) {\n",
       "        c = specifier.charAt(i++);\n",
       "        parse = parses[c in pads ? specifier.charAt(i++) : c];\n",
       "        if (!parse || ((j = parse(d, string, j)) < 0)) return -1;\n",
       "      } else if (c != string.charCodeAt(j++)) {\n",
       "        return -1;\n",
       "      }\n",
       "    }\n",
       "\n",
       "    return j;\n",
       "  }\n",
       "\n",
       "  function parsePeriod(d, string, i) {\n",
       "    var n = periodRe.exec(string.slice(i));\n",
       "    return n ? (d.p = periodLookup[n[0].toLowerCase()], i + n[0].length) : -1;\n",
       "  }\n",
       "\n",
       "  function parseShortWeekday(d, string, i) {\n",
       "    var n = shortWeekdayRe.exec(string.slice(i));\n",
       "    return n ? (d.w = shortWeekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;\n",
       "  }\n",
       "\n",
       "  function parseWeekday(d, string, i) {\n",
       "    var n = weekdayRe.exec(string.slice(i));\n",
       "    return n ? (d.w = weekdayLookup[n[0].toLowerCase()], i + n[0].length) : -1;\n",
       "  }\n",
       "\n",
       "  function parseShortMonth(d, string, i) {\n",
       "    var n = shortMonthRe.exec(string.slice(i));\n",
       "    return n ? (d.m = shortMonthLookup[n[0].toLowerCase()], i + n[0].length) : -1;\n",
       "  }\n",
       "\n",
       "  function parseMonth(d, string, i) {\n",
       "    var n = monthRe.exec(string.slice(i));\n",
       "    return n ? (d.m = monthLookup[n[0].toLowerCase()], i + n[0].length) : -1;\n",
       "  }\n",
       "\n",
       "  function parseLocaleDateTime(d, string, i) {\n",
       "    return parseSpecifier(d, locale_dateTime, string, i);\n",
       "  }\n",
       "\n",
       "  function parseLocaleDate(d, string, i) {\n",
       "    return parseSpecifier(d, locale_date, string, i);\n",
       "  }\n",
       "\n",
       "  function parseLocaleTime(d, string, i) {\n",
       "    return parseSpecifier(d, locale_time, string, i);\n",
       "  }\n",
       "\n",
       "  function formatShortWeekday(d) {\n",
       "    return locale_shortWeekdays[d.getDay()];\n",
       "  }\n",
       "\n",
       "  function formatWeekday(d) {\n",
       "    return locale_weekdays[d.getDay()];\n",
       "  }\n",
       "\n",
       "  function formatShortMonth(d) {\n",
       "    return locale_shortMonths[d.getMonth()];\n",
       "  }\n",
       "\n",
       "  function formatMonth(d) {\n",
       "    return locale_months[d.getMonth()];\n",
       "  }\n",
       "\n",
       "  function formatPeriod(d) {\n",
       "    return locale_periods[+(d.getHours() >= 12)];\n",
       "  }\n",
       "\n",
       "  function formatQuarter(d) {\n",
       "    return 1 + ~~(d.getMonth() / 3);\n",
       "  }\n",
       "\n",
       "  function formatUTCShortWeekday(d) {\n",
       "    return locale_shortWeekdays[d.getUTCDay()];\n",
       "  }\n",
       "\n",
       "  function formatUTCWeekday(d) {\n",
       "    return locale_weekdays[d.getUTCDay()];\n",
       "  }\n",
       "\n",
       "  function formatUTCShortMonth(d) {\n",
       "    return locale_shortMonths[d.getUTCMonth()];\n",
       "  }\n",
       "\n",
       "  function formatUTCMonth(d) {\n",
       "    return locale_months[d.getUTCMonth()];\n",
       "  }\n",
       "\n",
       "  function formatUTCPeriod(d) {\n",
       "    return locale_periods[+(d.getUTCHours() >= 12)];\n",
       "  }\n",
       "\n",
       "  function formatUTCQuarter(d) {\n",
       "    return 1 + ~~(d.getUTCMonth() / 3);\n",
       "  }\n",
       "\n",
       "  return {\n",
       "    format: function(specifier) {\n",
       "      var f = newFormat(specifier += \"\", formats);\n",
       "      f.toString = function() { return specifier; };\n",
       "      return f;\n",
       "    },\n",
       "    parse: function(specifier) {\n",
       "      var p = newParse(specifier += \"\", false);\n",
       "      p.toString = function() { return specifier; };\n",
       "      return p;\n",
       "    },\n",
       "    utcFormat: function(specifier) {\n",
       "      var f = newFormat(specifier += \"\", utcFormats);\n",
       "      f.toString = function() { return specifier; };\n",
       "      return f;\n",
       "    },\n",
       "    utcParse: function(specifier) {\n",
       "      var p = newParse(specifier += \"\", true);\n",
       "      p.toString = function() { return specifier; };\n",
       "      return p;\n",
       "    }\n",
       "  };\n",
       "}\n",
       "\n",
       "var pads = {\"-\": \"\", \"_\": \" \", \"0\": \"0\"},\n",
       "    numberRe = /^\\s*\\d+/, // note: ignores next directive\n",
       "    percentRe = /^%/,\n",
       "    requoteRe = /[\\\\^$*+?|[\\]().{}]/g;\n",
       "\n",
       "function pad(value, fill, width) {\n",
       "  var sign = value < 0 ? \"-\" : \"\",\n",
       "      string = (sign ? -value : value) + \"\",\n",
       "      length = string.length;\n",
       "  return sign + (length < width ? new Array(width - length + 1).join(fill) + string : string);\n",
       "}\n",
       "\n",
       "function requote(s) {\n",
       "  return s.replace(requoteRe, \"\\\\$&\");\n",
       "}\n",
       "\n",
       "function formatRe(names) {\n",
       "  return new RegExp(\"^(?:\" + names.map(requote).join(\"|\") + \")\", \"i\");\n",
       "}\n",
       "\n",
       "function formatLookup(names) {\n",
       "  var map = {}, i = -1, n = names.length;\n",
       "  while (++i < n) map[names[i].toLowerCase()] = i;\n",
       "  return map;\n",
       "}\n",
       "\n",
       "function parseWeekdayNumberSunday(d, string, i) {\n",
       "  var n = numberRe.exec(string.slice(i, i + 1));\n",
       "  return n ? (d.w = +n[0], i + n[0].length) : -1;\n",
       "}\n",
       "\n",
       "function parseWeekdayNumberMonday(d, string, i) {\n",
       "  var n = numberRe.exec(string.slice(i, i + 1));\n",
       "  return n ? (d.u = +n[0], i + n[0].length) : -1;\n",
       "}\n",
       "\n",
       "function parseWeekNumberSunday(d, string, i) {\n",
       "  var n = numberRe.exec(string.slice(i, i + 2));\n",
       "  return n ? (d.U = +n[0], i + n[0].length) : -1;\n",
       "}\n",
       "\n",
       "function parseWeekNumberISO(d, string, i) {\n",
       "  var n = numberRe.exec(string.slice(i, i + 2));\n",
       "  return n ? (d.V = +n[0], i + n[0].length) : -1;\n",
       "}\n",
       "\n",
       "function parseWeekNumberMonday(d, string, i) {\n",
       "  var n = numberRe.exec(string.slice(i, i + 2));\n",
       "  return n ? (d.W = +n[0], i + n[0].length) : -1;\n",
       "}\n",
       "\n",
       "function parseFullYear(d, string, i) {\n",
       "  var n = numberRe.exec(string.slice(i, i + 4));\n",
       "  return n ? (d.y = +n[0], i + n[0].length) : -1;\n",
       "}\n",
       "\n",
       "function parseYear(d, string, i) {\n",
       "  var n = numberRe.exec(string.slice(i, i + 2));\n",
       "  return n ? (d.y = +n[0] + (+n[0] > 68 ? 1900 : 2000), i + n[0].length) : -1;\n",
       "}\n",
       "\n",
       "function parseZone(d, string, i) {\n",
       "  var n = /^(Z)|([+-]\\d\\d)(?::?(\\d\\d))?/.exec(string.slice(i, i + 6));\n",
       "  return n ? (d.Z = n[1] ? 0 : -(n[2] + (n[3] || \"00\")), i + n[0].length) : -1;\n",
       "}\n",
       "\n",
       "function parseQuarter(d, string, i) {\n",
       "  var n = numberRe.exec(string.slice(i, i + 1));\n",
       "  return n ? (d.q = n[0] * 3 - 3, i + n[0].length) : -1;\n",
       "}\n",
       "\n",
       "function parseMonthNumber(d, string, i) {\n",
       "  var n = numberRe.exec(string.slice(i, i + 2));\n",
       "  return n ? (d.m = n[0] - 1, i + n[0].length) : -1;\n",
       "}\n",
       "\n",
       "function parseDayOfMonth(d, string, i) {\n",
       "  var n = numberRe.exec(string.slice(i, i + 2));\n",
       "  return n ? (d.d = +n[0], i + n[0].length) : -1;\n",
       "}\n",
       "\n",
       "function parseDayOfYear(d, string, i) {\n",
       "  var n = numberRe.exec(string.slice(i, i + 3));\n",
       "  return n ? (d.m = 0, d.d = +n[0], i + n[0].length) : -1;\n",
       "}\n",
       "\n",
       "function parseHour24(d, string, i) {\n",
       "  var n = numberRe.exec(string.slice(i, i + 2));\n",
       "  return n ? (d.H = +n[0], i + n[0].length) : -1;\n",
       "}\n",
       "\n",
       "function parseMinutes(d, string, i) {\n",
       "  var n = numberRe.exec(string.slice(i, i + 2));\n",
       "  return n ? (d.M = +n[0], i + n[0].length) : -1;\n",
       "}\n",
       "\n",
       "function parseSeconds(d, string, i) {\n",
       "  var n = numberRe.exec(string.slice(i, i + 2));\n",
       "  return n ? (d.S = +n[0], i + n[0].length) : -1;\n",
       "}\n",
       "\n",
       "function parseMilliseconds(d, string, i) {\n",
       "  var n = numberRe.exec(string.slice(i, i + 3));\n",
       "  return n ? (d.L = +n[0], i + n[0].length) : -1;\n",
       "}\n",
       "\n",
       "function parseMicroseconds(d, string, i) {\n",
       "  var n = numberRe.exec(string.slice(i, i + 6));\n",
       "  return n ? (d.L = Math.floor(n[0] / 1000), i + n[0].length) : -1;\n",
       "}\n",
       "\n",
       "function parseLiteralPercent(d, string, i) {\n",
       "  var n = percentRe.exec(string.slice(i, i + 1));\n",
       "  return n ? i + n[0].length : -1;\n",
       "}\n",
       "\n",
       "function parseUnixTimestamp(d, string, i) {\n",
       "  var n = numberRe.exec(string.slice(i));\n",
       "  return n ? (d.Q = +n[0], i + n[0].length) : -1;\n",
       "}\n",
       "\n",
       "function parseUnixTimestampSeconds(d, string, i) {\n",
       "  var n = numberRe.exec(string.slice(i));\n",
       "  return n ? (d.s = +n[0], i + n[0].length) : -1;\n",
       "}\n",
       "\n",
       "function formatDayOfMonth(d, p) {\n",
       "  return pad(d.getDate(), p, 2);\n",
       "}\n",
       "\n",
       "function formatHour24(d, p) {\n",
       "  return pad(d.getHours(), p, 2);\n",
       "}\n",
       "\n",
       "function formatHour12(d, p) {\n",
       "  return pad(d.getHours() % 12 || 12, p, 2);\n",
       "}\n",
       "\n",
       "function formatDayOfYear(d, p) {\n",
       "  return pad(1 + d3Time.timeDay.count(d3Time.timeYear(d), d), p, 3);\n",
       "}\n",
       "\n",
       "function formatMilliseconds(d, p) {\n",
       "  return pad(d.getMilliseconds(), p, 3);\n",
       "}\n",
       "\n",
       "function formatMicroseconds(d, p) {\n",
       "  return formatMilliseconds(d, p) + \"000\";\n",
       "}\n",
       "\n",
       "function formatMonthNumber(d, p) {\n",
       "  return pad(d.getMonth() + 1, p, 2);\n",
       "}\n",
       "\n",
       "function formatMinutes(d, p) {\n",
       "  return pad(d.getMinutes(), p, 2);\n",
       "}\n",
       "\n",
       "function formatSeconds(d, p) {\n",
       "  return pad(d.getSeconds(), p, 2);\n",
       "}\n",
       "\n",
       "function formatWeekdayNumberMonday(d) {\n",
       "  var day = d.getDay();\n",
       "  return day === 0 ? 7 : day;\n",
       "}\n",
       "\n",
       "function formatWeekNumberSunday(d, p) {\n",
       "  return pad(d3Time.timeSunday.count(d3Time.timeYear(d) - 1, d), p, 2);\n",
       "}\n",
       "\n",
       "function formatWeekNumberISO(d, p) {\n",
       "  var day = d.getDay();\n",
       "  d = (day >= 4 || day === 0) ? d3Time.timeThursday(d) : d3Time.timeThursday.ceil(d);\n",
       "  return pad(d3Time.timeThursday.count(d3Time.timeYear(d), d) + (d3Time.timeYear(d).getDay() === 4), p, 2);\n",
       "}\n",
       "\n",
       "function formatWeekdayNumberSunday(d) {\n",
       "  return d.getDay();\n",
       "}\n",
       "\n",
       "function formatWeekNumberMonday(d, p) {\n",
       "  return pad(d3Time.timeMonday.count(d3Time.timeYear(d) - 1, d), p, 2);\n",
       "}\n",
       "\n",
       "function formatYear(d, p) {\n",
       "  return pad(d.getFullYear() % 100, p, 2);\n",
       "}\n",
       "\n",
       "function formatFullYear(d, p) {\n",
       "  return pad(d.getFullYear() % 10000, p, 4);\n",
       "}\n",
       "\n",
       "function formatZone(d) {\n",
       "  var z = d.getTimezoneOffset();\n",
       "  return (z > 0 ? \"-\" : (z *= -1, \"+\"))\n",
       "      + pad(z / 60 | 0, \"0\", 2)\n",
       "      + pad(z % 60, \"0\", 2);\n",
       "}\n",
       "\n",
       "function formatUTCDayOfMonth(d, p) {\n",
       "  return pad(d.getUTCDate(), p, 2);\n",
       "}\n",
       "\n",
       "function formatUTCHour24(d, p) {\n",
       "  return pad(d.getUTCHours(), p, 2);\n",
       "}\n",
       "\n",
       "function formatUTCHour12(d, p) {\n",
       "  return pad(d.getUTCHours() % 12 || 12, p, 2);\n",
       "}\n",
       "\n",
       "function formatUTCDayOfYear(d, p) {\n",
       "  return pad(1 + d3Time.utcDay.count(d3Time.utcYear(d), d), p, 3);\n",
       "}\n",
       "\n",
       "function formatUTCMilliseconds(d, p) {\n",
       "  return pad(d.getUTCMilliseconds(), p, 3);\n",
       "}\n",
       "\n",
       "function formatUTCMicroseconds(d, p) {\n",
       "  return formatUTCMilliseconds(d, p) + \"000\";\n",
       "}\n",
       "\n",
       "function formatUTCMonthNumber(d, p) {\n",
       "  return pad(d.getUTCMonth() + 1, p, 2);\n",
       "}\n",
       "\n",
       "function formatUTCMinutes(d, p) {\n",
       "  return pad(d.getUTCMinutes(), p, 2);\n",
       "}\n",
       "\n",
       "function formatUTCSeconds(d, p) {\n",
       "  return pad(d.getUTCSeconds(), p, 2);\n",
       "}\n",
       "\n",
       "function formatUTCWeekdayNumberMonday(d) {\n",
       "  var dow = d.getUTCDay();\n",
       "  return dow === 0 ? 7 : dow;\n",
       "}\n",
       "\n",
       "function formatUTCWeekNumberSunday(d, p) {\n",
       "  return pad(d3Time.utcSunday.count(d3Time.utcYear(d) - 1, d), p, 2);\n",
       "}\n",
       "\n",
       "function formatUTCWeekNumberISO(d, p) {\n",
       "  var day = d.getUTCDay();\n",
       "  d = (day >= 4 || day === 0) ? d3Time.utcThursday(d) : d3Time.utcThursday.ceil(d);\n",
       "  return pad(d3Time.utcThursday.count(d3Time.utcYear(d), d) + (d3Time.utcYear(d).getUTCDay() === 4), p, 2);\n",
       "}\n",
       "\n",
       "function formatUTCWeekdayNumberSunday(d) {\n",
       "  return d.getUTCDay();\n",
       "}\n",
       "\n",
       "function formatUTCWeekNumberMonday(d, p) {\n",
       "  return pad(d3Time.utcMonday.count(d3Time.utcYear(d) - 1, d), p, 2);\n",
       "}\n",
       "\n",
       "function formatUTCYear(d, p) {\n",
       "  return pad(d.getUTCFullYear() % 100, p, 2);\n",
       "}\n",
       "\n",
       "function formatUTCFullYear(d, p) {\n",
       "  return pad(d.getUTCFullYear() % 10000, p, 4);\n",
       "}\n",
       "\n",
       "function formatUTCZone() {\n",
       "  return \"+0000\";\n",
       "}\n",
       "\n",
       "function formatLiteralPercent() {\n",
       "  return \"%\";\n",
       "}\n",
       "\n",
       "function formatUnixTimestamp(d) {\n",
       "  return +d;\n",
       "}\n",
       "\n",
       "function formatUnixTimestampSeconds(d) {\n",
       "  return Math.floor(+d / 1000);\n",
       "}\n",
       "\n",
       "var locale;\n",
       "\n",
       "defaultLocale({\n",
       "  dateTime: \"%x, %X\",\n",
       "  date: \"%-m/%-d/%Y\",\n",
       "  time: \"%-I:%M:%S %p\",\n",
       "  periods: [\"AM\", \"PM\"],\n",
       "  days: [\"Sunday\", \"Monday\", \"Tuesday\", \"Wednesday\", \"Thursday\", \"Friday\", \"Saturday\"],\n",
       "  shortDays: [\"Sun\", \"Mon\", \"Tue\", \"Wed\", \"Thu\", \"Fri\", \"Sat\"],\n",
       "  months: [\"January\", \"February\", \"March\", \"April\", \"May\", \"June\", \"July\", \"August\", \"September\", \"October\", \"November\", \"December\"],\n",
       "  shortMonths: [\"Jan\", \"Feb\", \"Mar\", \"Apr\", \"May\", \"Jun\", \"Jul\", \"Aug\", \"Sep\", \"Oct\", \"Nov\", \"Dec\"]\n",
       "});\n",
       "\n",
       "function defaultLocale(definition) {\n",
       "  locale = formatLocale(definition);\n",
       "  exports.timeFormat = locale.format;\n",
       "  exports.timeParse = locale.parse;\n",
       "  exports.utcFormat = locale.utcFormat;\n",
       "  exports.utcParse = locale.utcParse;\n",
       "  return locale;\n",
       "}\n",
       "\n",
       "var isoSpecifier = \"%Y-%m-%dT%H:%M:%S.%LZ\";\n",
       "\n",
       "function formatIsoNative(date) {\n",
       "  return date.toISOString();\n",
       "}\n",
       "\n",
       "var formatIso = Date.prototype.toISOString\n",
       "    ? formatIsoNative\n",
       "    : exports.utcFormat(isoSpecifier);\n",
       "\n",
       "function parseIsoNative(string) {\n",
       "  var date = new Date(string);\n",
       "  return isNaN(date) ? null : date;\n",
       "}\n",
       "\n",
       "var parseIso = +new Date(\"2000-01-01T00:00:00.000Z\")\n",
       "    ? parseIsoNative\n",
       "    : exports.utcParse(isoSpecifier);\n",
       "\n",
       "exports.isoFormat = formatIso;\n",
       "exports.isoParse = parseIso;\n",
       "exports.timeFormatDefaultLocale = defaultLocale;\n",
       "exports.timeFormatLocale = formatLocale;\n",
       "\n",
       "Object.defineProperty(exports, '__esModule', { value: true });\n",
       "\n",
       "}));\n",
       "\n",
       "},{\"d3-time\":14}],14:[function(require,module,exports){\n",
       "// https://d3js.org/d3-time/ v1.1.0 Copyright 2019 Mike Bostock\n",
       "(function (global, factory) {\n",
       "typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :\n",
       "typeof define === 'function' && define.amd ? define(['exports'], factory) :\n",
       "(global = global || self, factory(global.d3 = global.d3 || {}));\n",
       "}(this, function (exports) { 'use strict';\n",
       "\n",
       "var t0 = new Date,\n",
       "    t1 = new Date;\n",
       "\n",
       "function newInterval(floori, offseti, count, field) {\n",
       "\n",
       "  function interval(date) {\n",
       "    return floori(date = arguments.length === 0 ? new Date : new Date(+date)), date;\n",
       "  }\n",
       "\n",
       "  interval.floor = function(date) {\n",
       "    return floori(date = new Date(+date)), date;\n",
       "  };\n",
       "\n",
       "  interval.ceil = function(date) {\n",
       "    return floori(date = new Date(date - 1)), offseti(date, 1), floori(date), date;\n",
       "  };\n",
       "\n",
       "  interval.round = function(date) {\n",
       "    var d0 = interval(date),\n",
       "        d1 = interval.ceil(date);\n",
       "    return date - d0 < d1 - date ? d0 : d1;\n",
       "  };\n",
       "\n",
       "  interval.offset = function(date, step) {\n",
       "    return offseti(date = new Date(+date), step == null ? 1 : Math.floor(step)), date;\n",
       "  };\n",
       "\n",
       "  interval.range = function(start, stop, step) {\n",
       "    var range = [], previous;\n",
       "    start = interval.ceil(start);\n",
       "    step = step == null ? 1 : Math.floor(step);\n",
       "    if (!(start < stop) || !(step > 0)) return range; // also handles Invalid Date\n",
       "    do range.push(previous = new Date(+start)), offseti(start, step), floori(start);\n",
       "    while (previous < start && start < stop);\n",
       "    return range;\n",
       "  };\n",
       "\n",
       "  interval.filter = function(test) {\n",
       "    return newInterval(function(date) {\n",
       "      if (date >= date) while (floori(date), !test(date)) date.setTime(date - 1);\n",
       "    }, function(date, step) {\n",
       "      if (date >= date) {\n",
       "        if (step < 0) while (++step <= 0) {\n",
       "          while (offseti(date, -1), !test(date)) {} // eslint-disable-line no-empty\n",
       "        } else while (--step >= 0) {\n",
       "          while (offseti(date, +1), !test(date)) {} // eslint-disable-line no-empty\n",
       "        }\n",
       "      }\n",
       "    });\n",
       "  };\n",
       "\n",
       "  if (count) {\n",
       "    interval.count = function(start, end) {\n",
       "      t0.setTime(+start), t1.setTime(+end);\n",
       "      floori(t0), floori(t1);\n",
       "      return Math.floor(count(t0, t1));\n",
       "    };\n",
       "\n",
       "    interval.every = function(step) {\n",
       "      step = Math.floor(step);\n",
       "      return !isFinite(step) || !(step > 0) ? null\n",
       "          : !(step > 1) ? interval\n",
       "          : interval.filter(field\n",
       "              ? function(d) { return field(d) % step === 0; }\n",
       "              : function(d) { return interval.count(0, d) % step === 0; });\n",
       "    };\n",
       "  }\n",
       "\n",
       "  return interval;\n",
       "}\n",
       "\n",
       "var millisecond = newInterval(function() {\n",
       "  // noop\n",
       "}, function(date, step) {\n",
       "  date.setTime(+date + step);\n",
       "}, function(start, end) {\n",
       "  return end - start;\n",
       "});\n",
       "\n",
       "// An optimized implementation for this simple case.\n",
       "millisecond.every = function(k) {\n",
       "  k = Math.floor(k);\n",
       "  if (!isFinite(k) || !(k > 0)) return null;\n",
       "  if (!(k > 1)) return millisecond;\n",
       "  return newInterval(function(date) {\n",
       "    date.setTime(Math.floor(date / k) * k);\n",
       "  }, function(date, step) {\n",
       "    date.setTime(+date + step * k);\n",
       "  }, function(start, end) {\n",
       "    return (end - start) / k;\n",
       "  });\n",
       "};\n",
       "var milliseconds = millisecond.range;\n",
       "\n",
       "var durationSecond = 1e3;\n",
       "var durationMinute = 6e4;\n",
       "var durationHour = 36e5;\n",
       "var durationDay = 864e5;\n",
       "var durationWeek = 6048e5;\n",
       "\n",
       "var second = newInterval(function(date) {\n",
       "  date.setTime(date - date.getMilliseconds());\n",
       "}, function(date, step) {\n",
       "  date.setTime(+date + step * durationSecond);\n",
       "}, function(start, end) {\n",
       "  return (end - start) / durationSecond;\n",
       "}, function(date) {\n",
       "  return date.getUTCSeconds();\n",
       "});\n",
       "var seconds = second.range;\n",
       "\n",
       "var minute = newInterval(function(date) {\n",
       "  date.setTime(date - date.getMilliseconds() - date.getSeconds() * durationSecond);\n",
       "}, function(date, step) {\n",
       "  date.setTime(+date + step * durationMinute);\n",
       "}, function(start, end) {\n",
       "  return (end - start) / durationMinute;\n",
       "}, function(date) {\n",
       "  return date.getMinutes();\n",
       "});\n",
       "var minutes = minute.range;\n",
       "\n",
       "var hour = newInterval(function(date) {\n",
       "  date.setTime(date - date.getMilliseconds() - date.getSeconds() * durationSecond - date.getMinutes() * durationMinute);\n",
       "}, function(date, step) {\n",
       "  date.setTime(+date + step * durationHour);\n",
       "}, function(start, end) {\n",
       "  return (end - start) / durationHour;\n",
       "}, function(date) {\n",
       "  return date.getHours();\n",
       "});\n",
       "var hours = hour.range;\n",
       "\n",
       "var day = newInterval(function(date) {\n",
       "  date.setHours(0, 0, 0, 0);\n",
       "}, function(date, step) {\n",
       "  date.setDate(date.getDate() + step);\n",
       "}, function(start, end) {\n",
       "  return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationDay;\n",
       "}, function(date) {\n",
       "  return date.getDate() - 1;\n",
       "});\n",
       "var days = day.range;\n",
       "\n",
       "function weekday(i) {\n",
       "  return newInterval(function(date) {\n",
       "    date.setDate(date.getDate() - (date.getDay() + 7 - i) % 7);\n",
       "    date.setHours(0, 0, 0, 0);\n",
       "  }, function(date, step) {\n",
       "    date.setDate(date.getDate() + step * 7);\n",
       "  }, function(start, end) {\n",
       "    return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationWeek;\n",
       "  });\n",
       "}\n",
       "\n",
       "var sunday = weekday(0);\n",
       "var monday = weekday(1);\n",
       "var tuesday = weekday(2);\n",
       "var wednesday = weekday(3);\n",
       "var thursday = weekday(4);\n",
       "var friday = weekday(5);\n",
       "var saturday = weekday(6);\n",
       "\n",
       "var sundays = sunday.range;\n",
       "var mondays = monday.range;\n",
       "var tuesdays = tuesday.range;\n",
       "var wednesdays = wednesday.range;\n",
       "var thursdays = thursday.range;\n",
       "var fridays = friday.range;\n",
       "var saturdays = saturday.range;\n",
       "\n",
       "var month = newInterval(function(date) {\n",
       "  date.setDate(1);\n",
       "  date.setHours(0, 0, 0, 0);\n",
       "}, function(date, step) {\n",
       "  date.setMonth(date.getMonth() + step);\n",
       "}, function(start, end) {\n",
       "  return end.getMonth() - start.getMonth() + (end.getFullYear() - start.getFullYear()) * 12;\n",
       "}, function(date) {\n",
       "  return date.getMonth();\n",
       "});\n",
       "var months = month.range;\n",
       "\n",
       "var year = newInterval(function(date) {\n",
       "  date.setMonth(0, 1);\n",
       "  date.setHours(0, 0, 0, 0);\n",
       "}, function(date, step) {\n",
       "  date.setFullYear(date.getFullYear() + step);\n",
       "}, function(start, end) {\n",
       "  return end.getFullYear() - start.getFullYear();\n",
       "}, function(date) {\n",
       "  return date.getFullYear();\n",
       "});\n",
       "\n",
       "// An optimized implementation for this simple case.\n",
       "year.every = function(k) {\n",
       "  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {\n",
       "    date.setFullYear(Math.floor(date.getFullYear() / k) * k);\n",
       "    date.setMonth(0, 1);\n",
       "    date.setHours(0, 0, 0, 0);\n",
       "  }, function(date, step) {\n",
       "    date.setFullYear(date.getFullYear() + step * k);\n",
       "  });\n",
       "};\n",
       "var years = year.range;\n",
       "\n",
       "var utcMinute = newInterval(function(date) {\n",
       "  date.setUTCSeconds(0, 0);\n",
       "}, function(date, step) {\n",
       "  date.setTime(+date + step * durationMinute);\n",
       "}, function(start, end) {\n",
       "  return (end - start) / durationMinute;\n",
       "}, function(date) {\n",
       "  return date.getUTCMinutes();\n",
       "});\n",
       "var utcMinutes = utcMinute.range;\n",
       "\n",
       "var utcHour = newInterval(function(date) {\n",
       "  date.setUTCMinutes(0, 0, 0);\n",
       "}, function(date, step) {\n",
       "  date.setTime(+date + step * durationHour);\n",
       "}, function(start, end) {\n",
       "  return (end - start) / durationHour;\n",
       "}, function(date) {\n",
       "  return date.getUTCHours();\n",
       "});\n",
       "var utcHours = utcHour.range;\n",
       "\n",
       "var utcDay = newInterval(function(date) {\n",
       "  date.setUTCHours(0, 0, 0, 0);\n",
       "}, function(date, step) {\n",
       "  date.setUTCDate(date.getUTCDate() + step);\n",
       "}, function(start, end) {\n",
       "  return (end - start) / durationDay;\n",
       "}, function(date) {\n",
       "  return date.getUTCDate() - 1;\n",
       "});\n",
       "var utcDays = utcDay.range;\n",
       "\n",
       "function utcWeekday(i) {\n",
       "  return newInterval(function(date) {\n",
       "    date.setUTCDate(date.getUTCDate() - (date.getUTCDay() + 7 - i) % 7);\n",
       "    date.setUTCHours(0, 0, 0, 0);\n",
       "  }, function(date, step) {\n",
       "    date.setUTCDate(date.getUTCDate() + step * 7);\n",
       "  }, function(start, end) {\n",
       "    return (end - start) / durationWeek;\n",
       "  });\n",
       "}\n",
       "\n",
       "var utcSunday = utcWeekday(0);\n",
       "var utcMonday = utcWeekday(1);\n",
       "var utcTuesday = utcWeekday(2);\n",
       "var utcWednesday = utcWeekday(3);\n",
       "var utcThursday = utcWeekday(4);\n",
       "var utcFriday = utcWeekday(5);\n",
       "var utcSaturday = utcWeekday(6);\n",
       "\n",
       "var utcSundays = utcSunday.range;\n",
       "var utcMondays = utcMonday.range;\n",
       "var utcTuesdays = utcTuesday.range;\n",
       "var utcWednesdays = utcWednesday.range;\n",
       "var utcThursdays = utcThursday.range;\n",
       "var utcFridays = utcFriday.range;\n",
       "var utcSaturdays = utcSaturday.range;\n",
       "\n",
       "var utcMonth = newInterval(function(date) {\n",
       "  date.setUTCDate(1);\n",
       "  date.setUTCHours(0, 0, 0, 0);\n",
       "}, function(date, step) {\n",
       "  date.setUTCMonth(date.getUTCMonth() + step);\n",
       "}, function(start, end) {\n",
       "  return end.getUTCMonth() - start.getUTCMonth() + (end.getUTCFullYear() - start.getUTCFullYear()) * 12;\n",
       "}, function(date) {\n",
       "  return date.getUTCMonth();\n",
       "});\n",
       "var utcMonths = utcMonth.range;\n",
       "\n",
       "var utcYear = newInterval(function(date) {\n",
       "  date.setUTCMonth(0, 1);\n",
       "  date.setUTCHours(0, 0, 0, 0);\n",
       "}, function(date, step) {\n",
       "  date.setUTCFullYear(date.getUTCFullYear() + step);\n",
       "}, function(start, end) {\n",
       "  return end.getUTCFullYear() - start.getUTCFullYear();\n",
       "}, function(date) {\n",
       "  return date.getUTCFullYear();\n",
       "});\n",
       "\n",
       "// An optimized implementation for this simple case.\n",
       "utcYear.every = function(k) {\n",
       "  return !isFinite(k = Math.floor(k)) || !(k > 0) ? null : newInterval(function(date) {\n",
       "    date.setUTCFullYear(Math.floor(date.getUTCFullYear() / k) * k);\n",
       "    date.setUTCMonth(0, 1);\n",
       "    date.setUTCHours(0, 0, 0, 0);\n",
       "  }, function(date, step) {\n",
       "    date.setUTCFullYear(date.getUTCFullYear() + step * k);\n",
       "  });\n",
       "};\n",
       "var utcYears = utcYear.range;\n",
       "\n",
       "exports.timeDay = day;\n",
       "exports.timeDays = days;\n",
       "exports.timeFriday = friday;\n",
       "exports.timeFridays = fridays;\n",
       "exports.timeHour = hour;\n",
       "exports.timeHours = hours;\n",
       "exports.timeInterval = newInterval;\n",
       "exports.timeMillisecond = millisecond;\n",
       "exports.timeMilliseconds = milliseconds;\n",
       "exports.timeMinute = minute;\n",
       "exports.timeMinutes = minutes;\n",
       "exports.timeMonday = monday;\n",
       "exports.timeMondays = mondays;\n",
       "exports.timeMonth = month;\n",
       "exports.timeMonths = months;\n",
       "exports.timeSaturday = saturday;\n",
       "exports.timeSaturdays = saturdays;\n",
       "exports.timeSecond = second;\n",
       "exports.timeSeconds = seconds;\n",
       "exports.timeSunday = sunday;\n",
       "exports.timeSundays = sundays;\n",
       "exports.timeThursday = thursday;\n",
       "exports.timeThursdays = thursdays;\n",
       "exports.timeTuesday = tuesday;\n",
       "exports.timeTuesdays = tuesdays;\n",
       "exports.timeWednesday = wednesday;\n",
       "exports.timeWednesdays = wednesdays;\n",
       "exports.timeWeek = sunday;\n",
       "exports.timeWeeks = sundays;\n",
       "exports.timeYear = year;\n",
       "exports.timeYears = years;\n",
       "exports.utcDay = utcDay;\n",
       "exports.utcDays = utcDays;\n",
       "exports.utcFriday = utcFriday;\n",
       "exports.utcFridays = utcFridays;\n",
       "exports.utcHour = utcHour;\n",
       "exports.utcHours = utcHours;\n",
       "exports.utcMillisecond = millisecond;\n",
       "exports.utcMilliseconds = milliseconds;\n",
       "exports.utcMinute = utcMinute;\n",
       "exports.utcMinutes = utcMinutes;\n",
       "exports.utcMonday = utcMonday;\n",
       "exports.utcMondays = utcMondays;\n",
       "exports.utcMonth = utcMonth;\n",
       "exports.utcMonths = utcMonths;\n",
       "exports.utcSaturday = utcSaturday;\n",
       "exports.utcSaturdays = utcSaturdays;\n",
       "exports.utcSecond = second;\n",
       "exports.utcSeconds = seconds;\n",
       "exports.utcSunday = utcSunday;\n",
       "exports.utcSundays = utcSundays;\n",
       "exports.utcThursday = utcThursday;\n",
       "exports.utcThursdays = utcThursdays;\n",
       "exports.utcTuesday = utcTuesday;\n",
       "exports.utcTuesdays = utcTuesdays;\n",
       "exports.utcWednesday = utcWednesday;\n",
       "exports.utcWednesdays = utcWednesdays;\n",
       "exports.utcWeek = utcSunday;\n",
       "exports.utcWeeks = utcSundays;\n",
       "exports.utcYear = utcYear;\n",
       "exports.utcYears = utcYears;\n",
       "\n",
       "Object.defineProperty(exports, '__esModule', { value: true });\n",
       "\n",
       "}));\n",
       "\n",
       "},{}],15:[function(require,module,exports){\n",
       "// https://d3js.org/d3-timer/ v1.0.10 Copyright 2019 Mike Bostock\n",
       "(function (global, factory) {\n",
       "typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :\n",
       "typeof define === 'function' && define.amd ? define(['exports'], factory) :\n",
       "(global = global || self, factory(global.d3 = global.d3 || {}));\n",
       "}(this, function (exports) { 'use strict';\n",
       "\n",
       "var frame = 0, // is an animation frame pending?\n",
       "    timeout = 0, // is a timeout pending?\n",
       "    interval = 0, // are any timers active?\n",
       "    pokeDelay = 1000, // how frequently we check for clock skew\n",
       "    taskHead,\n",
       "    taskTail,\n",
       "    clockLast = 0,\n",
       "    clockNow = 0,\n",
       "    clockSkew = 0,\n",
       "    clock = typeof performance === \"object\" && performance.now ? performance : Date,\n",
       "    setFrame = typeof window === \"object\" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function(f) { setTimeout(f, 17); };\n",
       "\n",
       "function now() {\n",
       "  return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);\n",
       "}\n",
       "\n",
       "function clearNow() {\n",
       "  clockNow = 0;\n",
       "}\n",
       "\n",
       "function Timer() {\n",
       "  this._call =\n",
       "  this._time =\n",
       "  this._next = null;\n",
       "}\n",
       "\n",
       "Timer.prototype = timer.prototype = {\n",
       "  constructor: Timer,\n",
       "  restart: function(callback, delay, time) {\n",
       "    if (typeof callback !== \"function\") throw new TypeError(\"callback is not a function\");\n",
       "    time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);\n",
       "    if (!this._next && taskTail !== this) {\n",
       "      if (taskTail) taskTail._next = this;\n",
       "      else taskHead = this;\n",
       "      taskTail = this;\n",
       "    }\n",
       "    this._call = callback;\n",
       "    this._time = time;\n",
       "    sleep();\n",
       "  },\n",
       "  stop: function() {\n",
       "    if (this._call) {\n",
       "      this._call = null;\n",
       "      this._time = Infinity;\n",
       "      sleep();\n",
       "    }\n",
       "  }\n",
       "};\n",
       "\n",
       "function timer(callback, delay, time) {\n",
       "  var t = new Timer;\n",
       "  t.restart(callback, delay, time);\n",
       "  return t;\n",
       "}\n",
       "\n",
       "function timerFlush() {\n",
       "  now(); // Get the current time, if not already set.\n",
       "  ++frame; // Pretend we've set an alarm, if we haven't already.\n",
       "  var t = taskHead, e;\n",
       "  while (t) {\n",
       "    if ((e = clockNow - t._time) >= 0) t._call.call(null, e);\n",
       "    t = t._next;\n",
       "  }\n",
       "  --frame;\n",
       "}\n",
       "\n",
       "function wake() {\n",
       "  clockNow = (clockLast = clock.now()) + clockSkew;\n",
       "  frame = timeout = 0;\n",
       "  try {\n",
       "    timerFlush();\n",
       "  } finally {\n",
       "    frame = 0;\n",
       "    nap();\n",
       "    clockNow = 0;\n",
       "  }\n",
       "}\n",
       "\n",
       "function poke() {\n",
       "  var now = clock.now(), delay = now - clockLast;\n",
       "  if (delay > pokeDelay) clockSkew -= delay, clockLast = now;\n",
       "}\n",
       "\n",
       "function nap() {\n",
       "  var t0, t1 = taskHead, t2, time = Infinity;\n",
       "  while (t1) {\n",
       "    if (t1._call) {\n",
       "      if (time > t1._time) time = t1._time;\n",
       "      t0 = t1, t1 = t1._next;\n",
       "    } else {\n",
       "      t2 = t1._next, t1._next = null;\n",
       "      t1 = t0 ? t0._next = t2 : taskHead = t2;\n",
       "    }\n",
       "  }\n",
       "  taskTail = t0;\n",
       "  sleep(time);\n",
       "}\n",
       "\n",
       "function sleep(time) {\n",
       "  if (frame) return; // Soonest alarm already set, or will be.\n",
       "  if (timeout) timeout = clearTimeout(timeout);\n",
       "  var delay = time - clockNow; // Strictly less than if we recomputed clockNow.\n",
       "  if (delay > 24) {\n",
       "    if (time < Infinity) timeout = setTimeout(wake, time - clock.now() - clockSkew);\n",
       "    if (interval) interval = clearInterval(interval);\n",
       "  } else {\n",
       "    if (!interval) clockLast = clock.now(), interval = setInterval(poke, pokeDelay);\n",
       "    frame = 1, setFrame(wake);\n",
       "  }\n",
       "}\n",
       "\n",
       "function timeout$1(callback, delay, time) {\n",
       "  var t = new Timer;\n",
       "  delay = delay == null ? 0 : +delay;\n",
       "  t.restart(function(elapsed) {\n",
       "    t.stop();\n",
       "    callback(elapsed + delay);\n",
       "  }, delay, time);\n",
       "  return t;\n",
       "}\n",
       "\n",
       "function interval$1(callback, delay, time) {\n",
       "  var t = new Timer, total = delay;\n",
       "  if (delay == null) return t.restart(callback, delay, time), t;\n",
       "  delay = +delay, time = time == null ? now() : +time;\n",
       "  t.restart(function tick(elapsed) {\n",
       "    elapsed += total;\n",
       "    t.restart(tick, total += delay, time);\n",
       "    callback(elapsed);\n",
       "  }, delay, time);\n",
       "  return t;\n",
       "}\n",
       "\n",
       "exports.interval = interval$1;\n",
       "exports.now = now;\n",
       "exports.timeout = timeout$1;\n",
       "exports.timer = timer;\n",
       "exports.timerFlush = timerFlush;\n",
       "\n",
       "Object.defineProperty(exports, '__esModule', { value: true });\n",
       "\n",
       "}));\n",
       "\n",
       "},{}],16:[function(require,module,exports){\n",
       "// https://d3js.org/d3-transition/ v1.3.2 Copyright 2019 Mike Bostock\n",
       "(function (global, factory) {\n",
       "typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-selection'), require('d3-dispatch'), require('d3-timer'), require('d3-interpolate'), require('d3-color'), require('d3-ease')) :\n",
       "typeof define === 'function' && define.amd ? define(['exports', 'd3-selection', 'd3-dispatch', 'd3-timer', 'd3-interpolate', 'd3-color', 'd3-ease'], factory) :\n",
       "(global = global || self, factory(global.d3 = global.d3 || {}, global.d3, global.d3, global.d3, global.d3, global.d3, global.d3));\n",
       "}(this, function (exports, d3Selection, d3Dispatch, d3Timer, d3Interpolate, d3Color, d3Ease) { 'use strict';\n",
       "\n",
       "var emptyOn = d3Dispatch.dispatch(\"start\", \"end\", \"cancel\", \"interrupt\");\n",
       "var emptyTween = [];\n",
       "\n",
       "var CREATED = 0;\n",
       "var SCHEDULED = 1;\n",
       "var STARTING = 2;\n",
       "var STARTED = 3;\n",
       "var RUNNING = 4;\n",
       "var ENDING = 5;\n",
       "var ENDED = 6;\n",
       "\n",
       "function schedule(node, name, id, index, group, timing) {\n",
       "  var schedules = node.__transition;\n",
       "  if (!schedules) node.__transition = {};\n",
       "  else if (id in schedules) return;\n",
       "  create(node, id, {\n",
       "    name: name,\n",
       "    index: index, // For context during callback.\n",
       "    group: group, // For context during callback.\n",
       "    on: emptyOn,\n",
       "    tween: emptyTween,\n",
       "    time: timing.time,\n",
       "    delay: timing.delay,\n",
       "    duration: timing.duration,\n",
       "    ease: timing.ease,\n",
       "    timer: null,\n",
       "    state: CREATED\n",
       "  });\n",
       "}\n",
       "\n",
       "function init(node, id) {\n",
       "  var schedule = get(node, id);\n",
       "  if (schedule.state > CREATED) throw new Error(\"too late; already scheduled\");\n",
       "  return schedule;\n",
       "}\n",
       "\n",
       "function set(node, id) {\n",
       "  var schedule = get(node, id);\n",
       "  if (schedule.state > STARTED) throw new Error(\"too late; already running\");\n",
       "  return schedule;\n",
       "}\n",
       "\n",
       "function get(node, id) {\n",
       "  var schedule = node.__transition;\n",
       "  if (!schedule || !(schedule = schedule[id])) throw new Error(\"transition not found\");\n",
       "  return schedule;\n",
       "}\n",
       "\n",
       "function create(node, id, self) {\n",
       "  var schedules = node.__transition,\n",
       "      tween;\n",
       "\n",
       "  // Initialize the self timer when the transition is created.\n",
       "  // Note the actual delay is not known until the first callback!\n",
       "  schedules[id] = self;\n",
       "  self.timer = d3Timer.timer(schedule, 0, self.time);\n",
       "\n",
       "  function schedule(elapsed) {\n",
       "    self.state = SCHEDULED;\n",
       "    self.timer.restart(start, self.delay, self.time);\n",
       "\n",
       "    // If the elapsed delay is less than our first sleep, start immediately.\n",
       "    if (self.delay <= elapsed) start(elapsed - self.delay);\n",
       "  }\n",
       "\n",
       "  function start(elapsed) {\n",
       "    var i, j, n, o;\n",
       "\n",
       "    // If the state is not SCHEDULED, then we previously errored on start.\n",
       "    if (self.state !== SCHEDULED) return stop();\n",
       "\n",
       "    for (i in schedules) {\n",
       "      o = schedules[i];\n",
       "      if (o.name !== self.name) continue;\n",
       "\n",
       "      // While this element already has a starting transition during this frame,\n",
       "      // defer starting an interrupting transition until that transition has a\n",
       "      // chance to tick (and possibly end); see d3/d3-transition#54!\n",
       "      if (o.state === STARTED) return d3Timer.timeout(start);\n",
       "\n",
       "      // Interrupt the active transition, if any.\n",
       "      if (o.state === RUNNING) {\n",
       "        o.state = ENDED;\n",
       "        o.timer.stop();\n",
       "        o.on.call(\"interrupt\", node, node.__data__, o.index, o.group);\n",
       "        delete schedules[i];\n",
       "      }\n",
       "\n",
       "      // Cancel any pre-empted transitions.\n",
       "      else if (+i < id) {\n",
       "        o.state = ENDED;\n",
       "        o.timer.stop();\n",
       "        o.on.call(\"cancel\", node, node.__data__, o.index, o.group);\n",
       "        delete schedules[i];\n",
       "      }\n",
       "    }\n",
       "\n",
       "    // Defer the first tick to end of the current frame; see d3/d3#1576.\n",
       "    // Note the transition may be canceled after start and before the first tick!\n",
       "    // Note this must be scheduled before the start event; see d3/d3-transition#16!\n",
       "    // Assuming this is successful, subsequent callbacks go straight to tick.\n",
       "    d3Timer.timeout(function() {\n",
       "      if (self.state === STARTED) {\n",
       "        self.state = RUNNING;\n",
       "        self.timer.restart(tick, self.delay, self.time);\n",
       "        tick(elapsed);\n",
       "      }\n",
       "    });\n",
       "\n",
       "    // Dispatch the start event.\n",
       "    // Note this must be done before the tween are initialized.\n",
       "    self.state = STARTING;\n",
       "    self.on.call(\"start\", node, node.__data__, self.index, self.group);\n",
       "    if (self.state !== STARTING) return; // interrupted\n",
       "    self.state = STARTED;\n",
       "\n",
       "    // Initialize the tween, deleting null tween.\n",
       "    tween = new Array(n = self.tween.length);\n",
       "    for (i = 0, j = -1; i < n; ++i) {\n",
       "      if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {\n",
       "        tween[++j] = o;\n",
       "      }\n",
       "    }\n",
       "    tween.length = j + 1;\n",
       "  }\n",
       "\n",
       "  function tick(elapsed) {\n",
       "    var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),\n",
       "        i = -1,\n",
       "        n = tween.length;\n",
       "\n",
       "    while (++i < n) {\n",
       "      tween[i].call(node, t);\n",
       "    }\n",
       "\n",
       "    // Dispatch the end event.\n",
       "    if (self.state === ENDING) {\n",
       "      self.on.call(\"end\", node, node.__data__, self.index, self.group);\n",
       "      stop();\n",
       "    }\n",
       "  }\n",
       "\n",
       "  function stop() {\n",
       "    self.state = ENDED;\n",
       "    self.timer.stop();\n",
       "    delete schedules[id];\n",
       "    for (var i in schedules) return; // eslint-disable-line no-unused-vars\n",
       "    delete node.__transition;\n",
       "  }\n",
       "}\n",
       "\n",
       "function interrupt(node, name) {\n",
       "  var schedules = node.__transition,\n",
       "      schedule,\n",
       "      active,\n",
       "      empty = true,\n",
       "      i;\n",
       "\n",
       "  if (!schedules) return;\n",
       "\n",
       "  name = name == null ? null : name + \"\";\n",
       "\n",
       "  for (i in schedules) {\n",
       "    if ((schedule = schedules[i]).name !== name) { empty = false; continue; }\n",
       "    active = schedule.state > STARTING && schedule.state < ENDING;\n",
       "    schedule.state = ENDED;\n",
       "    schedule.timer.stop();\n",
       "    schedule.on.call(active ? \"interrupt\" : \"cancel\", node, node.__data__, schedule.index, schedule.group);\n",
       "    delete schedules[i];\n",
       "  }\n",
       "\n",
       "  if (empty) delete node.__transition;\n",
       "}\n",
       "\n",
       "function selection_interrupt(name) {\n",
       "  return this.each(function() {\n",
       "    interrupt(this, name);\n",
       "  });\n",
       "}\n",
       "\n",
       "function tweenRemove(id, name) {\n",
       "  var tween0, tween1;\n",
       "  return function() {\n",
       "    var schedule = set(this, id),\n",
       "        tween = schedule.tween;\n",
       "\n",
       "    // If this node shared tween with the previous node,\n",
       "    // just assign the updated shared tween and we're done!\n",
       "    // Otherwise, copy-on-write.\n",
       "    if (tween !== tween0) {\n",
       "      tween1 = tween0 = tween;\n",
       "      for (var i = 0, n = tween1.length; i < n; ++i) {\n",
       "        if (tween1[i].name === name) {\n",
       "          tween1 = tween1.slice();\n",
       "          tween1.splice(i, 1);\n",
       "          break;\n",
       "        }\n",
       "      }\n",
       "    }\n",
       "\n",
       "    schedule.tween = tween1;\n",
       "  };\n",
       "}\n",
       "\n",
       "function tweenFunction(id, name, value) {\n",
       "  var tween0, tween1;\n",
       "  if (typeof value !== \"function\") throw new Error;\n",
       "  return function() {\n",
       "    var schedule = set(this, id),\n",
       "        tween = schedule.tween;\n",
       "\n",
       "    // If this node shared tween with the previous node,\n",
       "    // just assign the updated shared tween and we're done!\n",
       "    // Otherwise, copy-on-write.\n",
       "    if (tween !== tween0) {\n",
       "      tween1 = (tween0 = tween).slice();\n",
       "      for (var t = {name: name, value: value}, i = 0, n = tween1.length; i < n; ++i) {\n",
       "        if (tween1[i].name === name) {\n",
       "          tween1[i] = t;\n",
       "          break;\n",
       "        }\n",
       "      }\n",
       "      if (i === n) tween1.push(t);\n",
       "    }\n",
       "\n",
       "    schedule.tween = tween1;\n",
       "  };\n",
       "}\n",
       "\n",
       "function transition_tween(name, value) {\n",
       "  var id = this._id;\n",
       "\n",
       "  name += \"\";\n",
       "\n",
       "  if (arguments.length < 2) {\n",
       "    var tween = get(this.node(), id).tween;\n",
       "    for (var i = 0, n = tween.length, t; i < n; ++i) {\n",
       "      if ((t = tween[i]).name === name) {\n",
       "        return t.value;\n",
       "      }\n",
       "    }\n",
       "    return null;\n",
       "  }\n",
       "\n",
       "  return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));\n",
       "}\n",
       "\n",
       "function tweenValue(transition, name, value) {\n",
       "  var id = transition._id;\n",
       "\n",
       "  transition.each(function() {\n",
       "    var schedule = set(this, id);\n",
       "    (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);\n",
       "  });\n",
       "\n",
       "  return function(node) {\n",
       "    return get(node, id).value[name];\n",
       "  };\n",
       "}\n",
       "\n",
       "function interpolate(a, b) {\n",
       "  var c;\n",
       "  return (typeof b === \"number\" ? d3Interpolate.interpolateNumber\n",
       "      : b instanceof d3Color.color ? d3Interpolate.interpolateRgb\n",
       "      : (c = d3Color.color(b)) ? (b = c, d3Interpolate.interpolateRgb)\n",
       "      : d3Interpolate.interpolateString)(a, b);\n",
       "}\n",
       "\n",
       "function attrRemove(name) {\n",
       "  return function() {\n",
       "    this.removeAttribute(name);\n",
       "  };\n",
       "}\n",
       "\n",
       "function attrRemoveNS(fullname) {\n",
       "  return function() {\n",
       "    this.removeAttributeNS(fullname.space, fullname.local);\n",
       "  };\n",
       "}\n",
       "\n",
       "function attrConstant(name, interpolate, value1) {\n",
       "  var string00,\n",
       "      string1 = value1 + \"\",\n",
       "      interpolate0;\n",
       "  return function() {\n",
       "    var string0 = this.getAttribute(name);\n",
       "    return string0 === string1 ? null\n",
       "        : string0 === string00 ? interpolate0\n",
       "        : interpolate0 = interpolate(string00 = string0, value1);\n",
       "  };\n",
       "}\n",
       "\n",
       "function attrConstantNS(fullname, interpolate, value1) {\n",
       "  var string00,\n",
       "      string1 = value1 + \"\",\n",
       "      interpolate0;\n",
       "  return function() {\n",
       "    var string0 = this.getAttributeNS(fullname.space, fullname.local);\n",
       "    return string0 === string1 ? null\n",
       "        : string0 === string00 ? interpolate0\n",
       "        : interpolate0 = interpolate(string00 = string0, value1);\n",
       "  };\n",
       "}\n",
       "\n",
       "function attrFunction(name, interpolate, value) {\n",
       "  var string00,\n",
       "      string10,\n",
       "      interpolate0;\n",
       "  return function() {\n",
       "    var string0, value1 = value(this), string1;\n",
       "    if (value1 == null) return void this.removeAttribute(name);\n",
       "    string0 = this.getAttribute(name);\n",
       "    string1 = value1 + \"\";\n",
       "    return string0 === string1 ? null\n",
       "        : string0 === string00 && string1 === string10 ? interpolate0\n",
       "        : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));\n",
       "  };\n",
       "}\n",
       "\n",
       "function attrFunctionNS(fullname, interpolate, value) {\n",
       "  var string00,\n",
       "      string10,\n",
       "      interpolate0;\n",
       "  return function() {\n",
       "    var string0, value1 = value(this), string1;\n",
       "    if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local);\n",
       "    string0 = this.getAttributeNS(fullname.space, fullname.local);\n",
       "    string1 = value1 + \"\";\n",
       "    return string0 === string1 ? null\n",
       "        : string0 === string00 && string1 === string10 ? interpolate0\n",
       "        : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));\n",
       "  };\n",
       "}\n",
       "\n",
       "function transition_attr(name, value) {\n",
       "  var fullname = d3Selection.namespace(name), i = fullname === \"transform\" ? d3Interpolate.interpolateTransformSvg : interpolate;\n",
       "  return this.attrTween(name, typeof value === \"function\"\n",
       "      ? (fullname.local ? attrFunctionNS : attrFunction)(fullname, i, tweenValue(this, \"attr.\" + name, value))\n",
       "      : value == null ? (fullname.local ? attrRemoveNS : attrRemove)(fullname)\n",
       "      : (fullname.local ? attrConstantNS : attrConstant)(fullname, i, value));\n",
       "}\n",
       "\n",
       "function attrInterpolate(name, i) {\n",
       "  return function(t) {\n",
       "    this.setAttribute(name, i.call(this, t));\n",
       "  };\n",
       "}\n",
       "\n",
       "function attrInterpolateNS(fullname, i) {\n",
       "  return function(t) {\n",
       "    this.setAttributeNS(fullname.space, fullname.local, i.call(this, t));\n",
       "  };\n",
       "}\n",
       "\n",
       "function attrTweenNS(fullname, value) {\n",
       "  var t0, i0;\n",
       "  function tween() {\n",
       "    var i = value.apply(this, arguments);\n",
       "    if (i !== i0) t0 = (i0 = i) && attrInterpolateNS(fullname, i);\n",
       "    return t0;\n",
       "  }\n",
       "  tween._value = value;\n",
       "  return tween;\n",
       "}\n",
       "\n",
       "function attrTween(name, value) {\n",
       "  var t0, i0;\n",
       "  function tween() {\n",
       "    var i = value.apply(this, arguments);\n",
       "    if (i !== i0) t0 = (i0 = i) && attrInterpolate(name, i);\n",
       "    return t0;\n",
       "  }\n",
       "  tween._value = value;\n",
       "  return tween;\n",
       "}\n",
       "\n",
       "function transition_attrTween(name, value) {\n",
       "  var key = \"attr.\" + name;\n",
       "  if (arguments.length < 2) return (key = this.tween(key)) && key._value;\n",
       "  if (value == null) return this.tween(key, null);\n",
       "  if (typeof value !== \"function\") throw new Error;\n",
       "  var fullname = d3Selection.namespace(name);\n",
       "  return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));\n",
       "}\n",
       "\n",
       "function delayFunction(id, value) {\n",
       "  return function() {\n",
       "    init(this, id).delay = +value.apply(this, arguments);\n",
       "  };\n",
       "}\n",
       "\n",
       "function delayConstant(id, value) {\n",
       "  return value = +value, function() {\n",
       "    init(this, id).delay = value;\n",
       "  };\n",
       "}\n",
       "\n",
       "function transition_delay(value) {\n",
       "  var id = this._id;\n",
       "\n",
       "  return arguments.length\n",
       "      ? this.each((typeof value === \"function\"\n",
       "          ? delayFunction\n",
       "          : delayConstant)(id, value))\n",
       "      : get(this.node(), id).delay;\n",
       "}\n",
       "\n",
       "function durationFunction(id, value) {\n",
       "  return function() {\n",
       "    set(this, id).duration = +value.apply(this, arguments);\n",
       "  };\n",
       "}\n",
       "\n",
       "function durationConstant(id, value) {\n",
       "  return value = +value, function() {\n",
       "    set(this, id).duration = value;\n",
       "  };\n",
       "}\n",
       "\n",
       "function transition_duration(value) {\n",
       "  var id = this._id;\n",
       "\n",
       "  return arguments.length\n",
       "      ? this.each((typeof value === \"function\"\n",
       "          ? durationFunction\n",
       "          : durationConstant)(id, value))\n",
       "      : get(this.node(), id).duration;\n",
       "}\n",
       "\n",
       "function easeConstant(id, value) {\n",
       "  if (typeof value !== \"function\") throw new Error;\n",
       "  return function() {\n",
       "    set(this, id).ease = value;\n",
       "  };\n",
       "}\n",
       "\n",
       "function transition_ease(value) {\n",
       "  var id = this._id;\n",
       "\n",
       "  return arguments.length\n",
       "      ? this.each(easeConstant(id, value))\n",
       "      : get(this.node(), id).ease;\n",
       "}\n",
       "\n",
       "function transition_filter(match) {\n",
       "  if (typeof match !== \"function\") match = d3Selection.matcher(match);\n",
       "\n",
       "  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {\n",
       "    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {\n",
       "      if ((node = group[i]) && match.call(node, node.__data__, i, group)) {\n",
       "        subgroup.push(node);\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "\n",
       "  return new Transition(subgroups, this._parents, this._name, this._id);\n",
       "}\n",
       "\n",
       "function transition_merge(transition) {\n",
       "  if (transition._id !== this._id) throw new Error;\n",
       "\n",
       "  for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {\n",
       "    for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {\n",
       "      if (node = group0[i] || group1[i]) {\n",
       "        merge[i] = node;\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "\n",
       "  for (; j < m0; ++j) {\n",
       "    merges[j] = groups0[j];\n",
       "  }\n",
       "\n",
       "  return new Transition(merges, this._parents, this._name, this._id);\n",
       "}\n",
       "\n",
       "function start(name) {\n",
       "  return (name + \"\").trim().split(/^|\\s+/).every(function(t) {\n",
       "    var i = t.indexOf(\".\");\n",
       "    if (i >= 0) t = t.slice(0, i);\n",
       "    return !t || t === \"start\";\n",
       "  });\n",
       "}\n",
       "\n",
       "function onFunction(id, name, listener) {\n",
       "  var on0, on1, sit = start(name) ? init : set;\n",
       "  return function() {\n",
       "    var schedule = sit(this, id),\n",
       "        on = schedule.on;\n",
       "\n",
       "    // If this node shared a dispatch with the previous node,\n",
       "    // just assign the updated shared dispatch and we're done!\n",
       "    // Otherwise, copy-on-write.\n",
       "    if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);\n",
       "\n",
       "    schedule.on = on1;\n",
       "  };\n",
       "}\n",
       "\n",
       "function transition_on(name, listener) {\n",
       "  var id = this._id;\n",
       "\n",
       "  return arguments.length < 2\n",
       "      ? get(this.node(), id).on.on(name)\n",
       "      : this.each(onFunction(id, name, listener));\n",
       "}\n",
       "\n",
       "function removeFunction(id) {\n",
       "  return function() {\n",
       "    var parent = this.parentNode;\n",
       "    for (var i in this.__transition) if (+i !== id) return;\n",
       "    if (parent) parent.removeChild(this);\n",
       "  };\n",
       "}\n",
       "\n",
       "function transition_remove() {\n",
       "  return this.on(\"end.remove\", removeFunction(this._id));\n",
       "}\n",
       "\n",
       "function transition_select(select) {\n",
       "  var name = this._name,\n",
       "      id = this._id;\n",
       "\n",
       "  if (typeof select !== \"function\") select = d3Selection.selector(select);\n",
       "\n",
       "  for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {\n",
       "    for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {\n",
       "      if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {\n",
       "        if (\"__data__\" in node) subnode.__data__ = node.__data__;\n",
       "        subgroup[i] = subnode;\n",
       "        schedule(subgroup[i], name, id, i, subgroup, get(node, id));\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "\n",
       "  return new Transition(subgroups, this._parents, name, id);\n",
       "}\n",
       "\n",
       "function transition_selectAll(select) {\n",
       "  var name = this._name,\n",
       "      id = this._id;\n",
       "\n",
       "  if (typeof select !== \"function\") select = d3Selection.selectorAll(select);\n",
       "\n",
       "  for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {\n",
       "    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {\n",
       "      if (node = group[i]) {\n",
       "        for (var children = select.call(node, node.__data__, i, group), child, inherit = get(node, id), k = 0, l = children.length; k < l; ++k) {\n",
       "          if (child = children[k]) {\n",
       "            schedule(child, name, id, k, children, inherit);\n",
       "          }\n",
       "        }\n",
       "        subgroups.push(children);\n",
       "        parents.push(node);\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "\n",
       "  return new Transition(subgroups, parents, name, id);\n",
       "}\n",
       "\n",
       "var Selection = d3Selection.selection.prototype.constructor;\n",
       "\n",
       "function transition_selection() {\n",
       "  return new Selection(this._groups, this._parents);\n",
       "}\n",
       "\n",
       "function styleNull(name, interpolate) {\n",
       "  var string00,\n",
       "      string10,\n",
       "      interpolate0;\n",
       "  return function() {\n",
       "    var string0 = d3Selection.style(this, name),\n",
       "        string1 = (this.style.removeProperty(name), d3Selection.style(this, name));\n",
       "    return string0 === string1 ? null\n",
       "        : string0 === string00 && string1 === string10 ? interpolate0\n",
       "        : interpolate0 = interpolate(string00 = string0, string10 = string1);\n",
       "  };\n",
       "}\n",
       "\n",
       "function styleRemove(name) {\n",
       "  return function() {\n",
       "    this.style.removeProperty(name);\n",
       "  };\n",
       "}\n",
       "\n",
       "function styleConstant(name, interpolate, value1) {\n",
       "  var string00,\n",
       "      string1 = value1 + \"\",\n",
       "      interpolate0;\n",
       "  return function() {\n",
       "    var string0 = d3Selection.style(this, name);\n",
       "    return string0 === string1 ? null\n",
       "        : string0 === string00 ? interpolate0\n",
       "        : interpolate0 = interpolate(string00 = string0, value1);\n",
       "  };\n",
       "}\n",
       "\n",
       "function styleFunction(name, interpolate, value) {\n",
       "  var string00,\n",
       "      string10,\n",
       "      interpolate0;\n",
       "  return function() {\n",
       "    var string0 = d3Selection.style(this, name),\n",
       "        value1 = value(this),\n",
       "        string1 = value1 + \"\";\n",
       "    if (value1 == null) string1 = value1 = (this.style.removeProperty(name), d3Selection.style(this, name));\n",
       "    return string0 === string1 ? null\n",
       "        : string0 === string00 && string1 === string10 ? interpolate0\n",
       "        : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));\n",
       "  };\n",
       "}\n",
       "\n",
       "function styleMaybeRemove(id, name) {\n",
       "  var on0, on1, listener0, key = \"style.\" + name, event = \"end.\" + key, remove;\n",
       "  return function() {\n",
       "    var schedule = set(this, id),\n",
       "        on = schedule.on,\n",
       "        listener = schedule.value[key] == null ? remove || (remove = styleRemove(name)) : undefined;\n",
       "\n",
       "    // If this node shared a dispatch with the previous node,\n",
       "    // just assign the updated shared dispatch and we're done!\n",
       "    // Otherwise, copy-on-write.\n",
       "    if (on !== on0 || listener0 !== listener) (on1 = (on0 = on).copy()).on(event, listener0 = listener);\n",
       "\n",
       "    schedule.on = on1;\n",
       "  };\n",
       "}\n",
       "\n",
       "function transition_style(name, value, priority) {\n",
       "  var i = (name += \"\") === \"transform\" ? d3Interpolate.interpolateTransformCss : interpolate;\n",
       "  return value == null ? this\n",
       "      .styleTween(name, styleNull(name, i))\n",
       "      .on(\"end.style.\" + name, styleRemove(name))\n",
       "    : typeof value === \"function\" ? this\n",
       "      .styleTween(name, styleFunction(name, i, tweenValue(this, \"style.\" + name, value)))\n",
       "      .each(styleMaybeRemove(this._id, name))\n",
       "    : this\n",
       "      .styleTween(name, styleConstant(name, i, value), priority)\n",
       "      .on(\"end.style.\" + name, null);\n",
       "}\n",
       "\n",
       "function styleInterpolate(name, i, priority) {\n",
       "  return function(t) {\n",
       "    this.style.setProperty(name, i.call(this, t), priority);\n",
       "  };\n",
       "}\n",
       "\n",
       "function styleTween(name, value, priority) {\n",
       "  var t, i0;\n",
       "  function tween() {\n",
       "    var i = value.apply(this, arguments);\n",
       "    if (i !== i0) t = (i0 = i) && styleInterpolate(name, i, priority);\n",
       "    return t;\n",
       "  }\n",
       "  tween._value = value;\n",
       "  return tween;\n",
       "}\n",
       "\n",
       "function transition_styleTween(name, value, priority) {\n",
       "  var key = \"style.\" + (name += \"\");\n",
       "  if (arguments.length < 2) return (key = this.tween(key)) && key._value;\n",
       "  if (value == null) return this.tween(key, null);\n",
       "  if (typeof value !== \"function\") throw new Error;\n",
       "  return this.tween(key, styleTween(name, value, priority == null ? \"\" : priority));\n",
       "}\n",
       "\n",
       "function textConstant(value) {\n",
       "  return function() {\n",
       "    this.textContent = value;\n",
       "  };\n",
       "}\n",
       "\n",
       "function textFunction(value) {\n",
       "  return function() {\n",
       "    var value1 = value(this);\n",
       "    this.textContent = value1 == null ? \"\" : value1;\n",
       "  };\n",
       "}\n",
       "\n",
       "function transition_text(value) {\n",
       "  return this.tween(\"text\", typeof value === \"function\"\n",
       "      ? textFunction(tweenValue(this, \"text\", value))\n",
       "      : textConstant(value == null ? \"\" : value + \"\"));\n",
       "}\n",
       "\n",
       "function textInterpolate(i) {\n",
       "  return function(t) {\n",
       "    this.textContent = i.call(this, t);\n",
       "  };\n",
       "}\n",
       "\n",
       "function textTween(value) {\n",
       "  var t0, i0;\n",
       "  function tween() {\n",
       "    var i = value.apply(this, arguments);\n",
       "    if (i !== i0) t0 = (i0 = i) && textInterpolate(i);\n",
       "    return t0;\n",
       "  }\n",
       "  tween._value = value;\n",
       "  return tween;\n",
       "}\n",
       "\n",
       "function transition_textTween(value) {\n",
       "  var key = \"text\";\n",
       "  if (arguments.length < 1) return (key = this.tween(key)) && key._value;\n",
       "  if (value == null) return this.tween(key, null);\n",
       "  if (typeof value !== \"function\") throw new Error;\n",
       "  return this.tween(key, textTween(value));\n",
       "}\n",
       "\n",
       "function transition_transition() {\n",
       "  var name = this._name,\n",
       "      id0 = this._id,\n",
       "      id1 = newId();\n",
       "\n",
       "  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {\n",
       "    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {\n",
       "      if (node = group[i]) {\n",
       "        var inherit = get(node, id0);\n",
       "        schedule(node, name, id1, i, group, {\n",
       "          time: inherit.time + inherit.delay + inherit.duration,\n",
       "          delay: 0,\n",
       "          duration: inherit.duration,\n",
       "          ease: inherit.ease\n",
       "        });\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "\n",
       "  return new Transition(groups, this._parents, name, id1);\n",
       "}\n",
       "\n",
       "function transition_end() {\n",
       "  var on0, on1, that = this, id = that._id, size = that.size();\n",
       "  return new Promise(function(resolve, reject) {\n",
       "    var cancel = {value: reject},\n",
       "        end = {value: function() { if (--size === 0) resolve(); }};\n",
       "\n",
       "    that.each(function() {\n",
       "      var schedule = set(this, id),\n",
       "          on = schedule.on;\n",
       "\n",
       "      // If this node shared a dispatch with the previous node,\n",
       "      // just assign the updated shared dispatch and we're done!\n",
       "      // Otherwise, copy-on-write.\n",
       "      if (on !== on0) {\n",
       "        on1 = (on0 = on).copy();\n",
       "        on1._.cancel.push(cancel);\n",
       "        on1._.interrupt.push(cancel);\n",
       "        on1._.end.push(end);\n",
       "      }\n",
       "\n",
       "      schedule.on = on1;\n",
       "    });\n",
       "  });\n",
       "}\n",
       "\n",
       "var id = 0;\n",
       "\n",
       "function Transition(groups, parents, name, id) {\n",
       "  this._groups = groups;\n",
       "  this._parents = parents;\n",
       "  this._name = name;\n",
       "  this._id = id;\n",
       "}\n",
       "\n",
       "function transition(name) {\n",
       "  return d3Selection.selection().transition(name);\n",
       "}\n",
       "\n",
       "function newId() {\n",
       "  return ++id;\n",
       "}\n",
       "\n",
       "var selection_prototype = d3Selection.selection.prototype;\n",
       "\n",
       "Transition.prototype = transition.prototype = {\n",
       "  constructor: Transition,\n",
       "  select: transition_select,\n",
       "  selectAll: transition_selectAll,\n",
       "  filter: transition_filter,\n",
       "  merge: transition_merge,\n",
       "  selection: transition_selection,\n",
       "  transition: transition_transition,\n",
       "  call: selection_prototype.call,\n",
       "  nodes: selection_prototype.nodes,\n",
       "  node: selection_prototype.node,\n",
       "  size: selection_prototype.size,\n",
       "  empty: selection_prototype.empty,\n",
       "  each: selection_prototype.each,\n",
       "  on: transition_on,\n",
       "  attr: transition_attr,\n",
       "  attrTween: transition_attrTween,\n",
       "  style: transition_style,\n",
       "  styleTween: transition_styleTween,\n",
       "  text: transition_text,\n",
       "  textTween: transition_textTween,\n",
       "  remove: transition_remove,\n",
       "  tween: transition_tween,\n",
       "  delay: transition_delay,\n",
       "  duration: transition_duration,\n",
       "  ease: transition_ease,\n",
       "  end: transition_end\n",
       "};\n",
       "\n",
       "var defaultTiming = {\n",
       "  time: null, // Set on use.\n",
       "  delay: 0,\n",
       "  duration: 250,\n",
       "  ease: d3Ease.easeCubicInOut\n",
       "};\n",
       "\n",
       "function inherit(node, id) {\n",
       "  var timing;\n",
       "  while (!(timing = node.__transition) || !(timing = timing[id])) {\n",
       "    if (!(node = node.parentNode)) {\n",
       "      return defaultTiming.time = d3Timer.now(), defaultTiming;\n",
       "    }\n",
       "  }\n",
       "  return timing;\n",
       "}\n",
       "\n",
       "function selection_transition(name) {\n",
       "  var id,\n",
       "      timing;\n",
       "\n",
       "  if (name instanceof Transition) {\n",
       "    id = name._id, name = name._name;\n",
       "  } else {\n",
       "    id = newId(), (timing = defaultTiming).time = d3Timer.now(), name = name == null ? null : name + \"\";\n",
       "  }\n",
       "\n",
       "  for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {\n",
       "    for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {\n",
       "      if (node = group[i]) {\n",
       "        schedule(node, name, id, i, group, timing || inherit(node, id));\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "\n",
       "  return new Transition(groups, this._parents, name, id);\n",
       "}\n",
       "\n",
       "d3Selection.selection.prototype.interrupt = selection_interrupt;\n",
       "d3Selection.selection.prototype.transition = selection_transition;\n",
       "\n",
       "var root = [null];\n",
       "\n",
       "function active(node, name) {\n",
       "  var schedules = node.__transition,\n",
       "      schedule,\n",
       "      i;\n",
       "\n",
       "  if (schedules) {\n",
       "    name = name == null ? null : name + \"\";\n",
       "    for (i in schedules) {\n",
       "      if ((schedule = schedules[i]).state > SCHEDULED && schedule.name === name) {\n",
       "        return new Transition([[node]], root, name, +i);\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "\n",
       "  return null;\n",
       "}\n",
       "\n",
       "exports.active = active;\n",
       "exports.interrupt = interrupt;\n",
       "exports.transition = transition;\n",
       "\n",
       "Object.defineProperty(exports, '__esModule', { value: true });\n",
       "\n",
       "}));\n",
       "\n",
       "},{\"d3-color\":4,\"d3-dispatch\":5,\"d3-ease\":6,\"d3-interpolate\":8,\"d3-selection\":11,\"d3-timer\":15}]},{},[1]);\n",
       "</script><script>; (function () {\n",
       "  'use strict';\n",
       "  const d3 = window.d3;\n",
       "\n",
       "  const margin = { top: 10, right: 10, bottom: 10, left: 35 };\n",
       "  const axisMargin = { top: 10, right: 15, bottom: 10, left: 15 };\n",
       "  const facetWidth = 30;\n",
       "  const legendHeight = 40;\n",
       "  const xAxisHeight = 30;\n",
       "  const xLabelHeight = 20;\n",
       "\n",
       "  function computeLimitX(original, data, lineKeys, fn) {\n",
       "    let min = Infinity;\n",
       "    let max = -Infinity;\n",
       "\n",
       "    for (const lineKey of lineKeys) {\n",
       "      [min, max] = d3.extent(data.get(lineKey).map(fn));\n",
       "      // const [localMin, localMax] = d3.extent(data.get(lineKey).map(fn));\n",
       "      // min = Math.min(min, localMin);\n",
       "      // max = Math.max(max, localMax);\n",
       "    }\n",
       "\n",
       "    return [\n",
       "      min,\n",
       "      max\n",
       "      // original[0] === null ? min : original[0],\n",
       "      // original[1] === null ? max : original[1]\n",
       "    ];\n",
       "  }\n",
       "\n",
       "  function computeLimitY(original, data, lineKeys, fn) {\n",
       "    let min = Infinity;\n",
       "    let max = -Infinity;\n",
       "\n",
       "    for (const lineKey of lineKeys) {\n",
       "      const [localMin, localMax] = d3.extent(data.get(lineKey).map(fn));\n",
       "      min = Math.min(min, localMin);\n",
       "      max = Math.max(max, localMax);\n",
       "    }\n",
       "\n",
       "    return [\n",
       "      original[0] === null ? min : original[0],\n",
       "      original[1] === null ? max : original[1]\n",
       "    ];\n",
       "  }\n",
       "\n",
       "  function highestMinorMod(majorTickCount, minorTickMax) {\n",
       "    return Math.floor((minorTickMax - 1) / (majorTickCount - 1));\n",
       "  }\n",
       "\n",
       "  function createGridTicks(majorTicks, minorMod) {\n",
       "    const minorTicks = [];\n",
       "    for (let majorIndex = 0; majorIndex < majorTicks.length - 1; majorIndex++) {\n",
       "      minorTicks.push(majorTicks[majorIndex]);\n",
       "      const distance = majorTicks[majorIndex + 1] - majorTicks[majorIndex];\n",
       "      for (let i = 1; i <= minorMod - 1; i++) {\n",
       "        minorTicks.push(majorTicks[majorIndex] + (i / minorMod) * distance);\n",
       "      }\n",
       "    }\n",
       "    minorTicks.push(majorTicks[majorTicks.length - 1]);\n",
       "    return minorTicks;\n",
       "  }\n",
       "\n",
       "  class SubGraph {\n",
       "    constructor({ container, id, index, height, width, drawXAxis, lineConfig, facetLabel, ylim, xlim }) {\n",
       "      this.container = container;\n",
       "\n",
       "      this.graphWidth = width - facetWidth - margin.left - margin.right;\n",
       "      this.graphHeight = height - margin.top - margin.bottom;\n",
       "\n",
       "      this.axisWidth = this.graphWidth - axisMargin.left - axisMargin.right;\n",
       "      this.axisHeight = this.graphHeight - axisMargin.top - axisMargin.bottom;\n",
       "\n",
       "      this.xlim = xlim;\n",
       "      this.dynamicXlim = this.xlim.includes(null);\n",
       "      this.ylim = ylim;\n",
       "      this.dynamicYlim = this.ylim.includes(null);\n",
       "\n",
       "      this.lineKeys = Object.keys(lineConfig);\n",
       "      this.lineConfig = lineConfig;\n",
       "\n",
       "      // Create graph container\n",
       "      this.graph = this.container.append('g')\n",
       "        .attr('transform',\n",
       "          'translate(' + margin.left + ',' + margin.top + ')');\n",
       "\n",
       "      // Create facet\n",
       "      this.facet = this.container.append('g')\n",
       "        .classed('facet', true)\n",
       "        .attr('transform', `translate(${margin.left + this.graphWidth}, ${margin.top})`);\n",
       "      this.facet.append('rect')\n",
       "        .classed('facet-background', true)\n",
       "        .attr('width', facetWidth)\n",
       "        .attr('height', this.graphHeight);\n",
       "      const facetTextPath = this.facet.append('path')\n",
       "        .attr('d', `M10,0 V${this.graphHeight}`)\n",
       "        .attr('id', `learning-curve-${id}-${index}-facet-text`);\n",
       "      const facetText = this.facet.append('text')\n",
       "        .append('textPath')\n",
       "        .attr('startOffset', '50%')\n",
       "        .attr('href', `#learning-curve-${id}-${index}-facet-text`)\n",
       "        .attr('text-anchor', 'middle')\n",
       "        .text(facetLabel);\n",
       "      facetText.node()\n",
       "        .setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href', `#learning-curve-${id}-${index}-facet-text`);\n",
       "\n",
       "      // Create background\n",
       "      this.background = this.graph.append(\"rect\")\n",
       "        .attr(\"class\", \"background\")\n",
       "        .attr(\"height\", this.graphHeight)\n",
       "        .attr(\"width\", this.graphWidth);\n",
       "\n",
       "      // define scales\n",
       "      this.xScale = d3.scaleLinear()\n",
       "        .range([0, this.axisWidth]);\n",
       "\n",
       "      this.yScale = d3.scaleLinear()\n",
       "        .range([this.axisHeight, 0]);\n",
       "\n",
       "      // compute tick marks\n",
       "      this._updateXscale(this.xlim);\n",
       "      this._updateYscale(this.ylim);\n",
       "\n",
       "      // create x-grid\n",
       "      this.xGrid = d3.axisBottom(this.xScale)\n",
       "        .tickValues(this.xTicksGrid)\n",
       "        .tickSize(-this.graphHeight);\n",
       "      this.xGridElement = this.graph.append(\"g\")\n",
       "        .attr(\"class\", \"grid\")\n",
       "        .attr(\"transform\", `translate(${axisMargin.left},${this.graphHeight})`);\n",
       "\n",
       "      // create y-grid\n",
       "      this.yGrid = d3.axisLeft(this.yScale)\n",
       "        .tickValues(this.yTicksGrid)\n",
       "        .tickSize(-this.graphWidth);\n",
       "      this.yGridElement = this.graph.append(\"g\")\n",
       "        .attr(\"class\", \"grid\")\n",
       "        .attr('transform', `translate(0,${axisMargin.top})`);\n",
       "\n",
       "      // define x-axis\n",
       "      this.xAxis = d3.axisBottom(this.xScale)\n",
       "        .tickValues(this.xTicks);\n",
       "      this.xAxisElement = this.graph.append('g')\n",
       "        .attr(\"class\", \"axis\")\n",
       "        .classed('hide-axis', !drawXAxis)\n",
       "        .attr('transform', `translate(${axisMargin.left},${this.graphHeight})`);\n",
       "\n",
       "      // define y-axis\n",
       "      this.yAxis = d3.axisLeft(this.yScale)\n",
       "        .tickValues(this.yTicks);\n",
       "      this.yAxisElement = this.graph.append('g')\n",
       "        .attr(\"class\", \"axis\")\n",
       "        .attr('transform', `translate(0,${axisMargin.top})`);\n",
       "\n",
       "      // draw axis\n",
       "      if (!this.dynamicYlim) this._drawYaxis();\n",
       "      if (!this.dynamicXlim) this._drawXaxis();\n",
       "\n",
       "      // Define drawer functions and line elements\n",
       "      this.lineDrawers = new Map();\n",
       "      this.lineElements = new Map();\n",
       "      const self = this;\n",
       "      for (const lineKey of this.lineKeys) {\n",
       "        // create drawer function\n",
       "        const lineDrawer = d3.line()\n",
       "          .x((d) => self.xScale(d.x))\n",
       "          .y((d) => this.yScale(d.y));\n",
       "        this.lineDrawers.set(lineKey, lineDrawer);\n",
       "\n",
       "        // create line element\n",
       "        const lineElement = this.graph.append('path')\n",
       "          .attr('class', 'line')\n",
       "          .attr('transform', `translate(${axisMargin.left},${axisMargin.top})`)\n",
       "          .attr('stroke', lineConfig[lineKey].color);\n",
       "        this.lineElements.set(lineKey, lineElement);\n",
       "      }\n",
       "    }\n",
       "\n",
       "    _updateXscale(xlim) {\n",
       "      this.xScale.domain(xlim); //.nice(6);\n",
       "      this.xTicks = this.xScale.ticks(6);\n",
       "      this.xTicksMod = highestMinorMod(this.xTicks.length, 19);\n",
       "      this.xTicksGrid = createGridTicks(this.xTicks, this.xTicksMod);\n",
       "    }\n",
       "\n",
       "    _drawXaxis() {\n",
       "      // update x-grid\n",
       "      this.xGridElement.transition()\n",
       "        .call(this.xGrid.tickValues(this.xTicksGrid))\n",
       "        .call((transition) => transition\n",
       "          .selectAll('.tick')\n",
       "          .style('stroke-opacity', (v) => this.xTicks.includes(v) ? '1.0' : '0.5')\n",
       "        );\n",
       "\n",
       "      // update x-axis\n",
       "      this.xAxisElement.transition().call(\n",
       "        this.xAxis.tickValues(this.xTicks)\n",
       "      );\n",
       "    }\n",
       "\n",
       "    _updateYscale(ylim) {\n",
       "      this.yScale.domain(ylim).nice(3);\n",
       "      this.yTicks = this.yScale.ticks(3);\n",
       "      this.yTicksMod = highestMinorMod(this.yTicks.length, 9);\n",
       "      this.yTicksGrid = createGridTicks(this.yTicks, this.yTicksMod);\n",
       "    }\n",
       "\n",
       "    _drawYaxis() {\n",
       "      // update x-grid\n",
       "      this.yGridElement.transition()\n",
       "        .call(this.yGrid.tickValues(this.yTicksGrid))\n",
       "        .call((transition) => transition\n",
       "          .selectAll('.tick')\n",
       "          .style('stroke-opacity', (v) => this.yTicks.includes(v) ? '1.0' : '0.5')\n",
       "        );\n",
       "      // update x-axis\n",
       "      this.yAxisElement.transition().call(\n",
       "        this.yAxis.tickValues(this.yTicks)\n",
       "      );\n",
       "    }\n",
       "\n",
       "    setData(data) {\n",
       "      // Compute x-axis limit\n",
       "      if (this.dynamicXlim) {\n",
       "        const xlim = computeLimitX(this.xlim, data, this.lineKeys, (d) => d.x);\n",
       "        if (xlim[0] !== this.xlim[0] || xlim[1] !== this.xlim[1]) {\n",
       "          this._updateXscale(xlim);\n",
       "        }\n",
       "      }\n",
       "\n",
       "      // Update y-axis limit\n",
       "      if (this.dynamicYlim) {\n",
       "        const ylim = computeLimitY(this.ylim, data, this.lineKeys, (d) => d.y);\n",
       "        if (ylim[0] !== this.ylim[0] || ylim[1] !== this.ylim[1]) {\n",
       "          this._updateYscale(ylim);\n",
       "        }\n",
       "      }\n",
       "\n",
       "      // Update line data\n",
       "      for (let lineKey of this.lineKeys) {\n",
       "        this.lineElements.get(lineKey).data([\n",
       "          data.get(lineKey)\n",
       "        ]);\n",
       "      }\n",
       "    }\n",
       "\n",
       "    draw() {\n",
       "      if (this.dynamicXlim) this._drawXaxis();\n",
       "      if (this.dynamicYlim) this._drawYaxis();\n",
       "\n",
       "      // update lines\n",
       "      for (let lineKey of this.lineKeys) {\n",
       "        this.lineElements.get(lineKey)\n",
       "          .attr('d', this.lineDrawers.get(lineKey));\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "\n",
       "  class LearningCurvePlot {\n",
       "    constructor({ container, id, height, width, facetConfig, lineConfig, xAxisConfig }) {\n",
       "      this.facetKeys = Object.keys(facetConfig);\n",
       "\n",
       "      const innerHeight = height - legendHeight - xLabelHeight - xAxisHeight;\n",
       "      const subGraphHeight = innerHeight / this.facetKeys.length;\n",
       "\n",
       "      this._container = d3.select(container)\n",
       "        .classed('learning-curve', true)\n",
       "        .style('height', `${height}px`)\n",
       "        .style('width', `${width}px`)\n",
       "        .attr('height', height)\n",
       "        .attr('width', width)\n",
       "        .attr('xmlns:xlink', 'http://www.w3.org/1999/xlink');\n",
       "\n",
       "      // Create a SubGraph for each facet\n",
       "      this._facets = new Map();\n",
       "      for (let facetIndex = 0; facetIndex < this.facetKeys.length; facetIndex++) {\n",
       "        const facetKey = this.facetKeys[facetIndex];\n",
       "        this._facets.set(\n",
       "          facetKey,\n",
       "          new SubGraph({\n",
       "            container: this._container.append('g')\n",
       "              .attr('transform', `translate(0, ${facetIndex * subGraphHeight})`),\n",
       "            id: id,\n",
       "            index: facetIndex,\n",
       "            height: Math.round(subGraphHeight),\n",
       "            width: width,\n",
       "\n",
       "            drawXAxis: facetIndex == this.facetKeys.length - 1,\n",
       "\n",
       "            lineConfig: lineConfig,\n",
       "            facetLabel: facetConfig[facetKey].name,\n",
       "            ylim: facetConfig[facetKey].limit,\n",
       "            xlim: xAxisConfig.limit\n",
       "          })\n",
       "        );\n",
       "      }\n",
       "\n",
       "      const afterSubGraphHeight = height - legendHeight - xLabelHeight;\n",
       "      const plotWidth = width - margin.left - margin.right;\n",
       "      const xAxisWidth = plotWidth - facetWidth;\n",
       "\n",
       "      // Draw x-axis label\n",
       "      this._xLabel = this._container.append('text')\n",
       "        .attr('text-anchor', 'middle')\n",
       "        .attr('transform', `translate(${margin.left}, ${afterSubGraphHeight})`)\n",
       "        .attr('x', xAxisWidth / 2)\n",
       "        .text(xAxisConfig.name);\n",
       "\n",
       "      // Draw legends\n",
       "      this._legend = this._container\n",
       "        .append('g')\n",
       "        .classed('legned', true)\n",
       "        .attr('transform', `translate(${margin.left}, ${afterSubGraphHeight + xLabelHeight})`);\n",
       "      this._legendOfsset = this._legend.append('g');\n",
       "\n",
       "      let currentOffset = 0;\n",
       "      for (const { name, color } of Object.values(lineConfig)) {\n",
       "        // Draw rect with line inside [-]\n",
       "        this._legendOfsset.append('rect')\n",
       "          .attr('width', 25)\n",
       "          .attr('height', 25)\n",
       "          .attr('x', currentOffset);\n",
       "        this._legendOfsset.append('line')\n",
       "          .attr('x1', currentOffset + 2)\n",
       "          .attr('x2', currentOffset + 25 - 2)\n",
       "          .attr('y1', 25 / 2)\n",
       "          .attr('y2', 25 / 2)\n",
       "          .attr('stroke', color);\n",
       "        currentOffset += 30;\n",
       "\n",
       "        // Draw text\n",
       "        const textNode = this._legendOfsset.append('text')\n",
       "          .attr('x', currentOffset)\n",
       "          .attr('y', 19)\n",
       "          .text(name);\n",
       "        const textWidth = textNode.node().getComputedTextLength();\n",
       "        currentOffset += textWidth + 20;\n",
       "      }\n",
       "      currentOffset -= 20;\n",
       "\n",
       "      this._legendOfsset\n",
       "        .attr('transform', `translate(${(plotWidth - currentOffset) / 2}, 0)`);\n",
       "    }\n",
       "\n",
       "    setData(data) {\n",
       "      for (let facetKey of this.facetKeys) {\n",
       "        this._facets.get(facetKey).setData(data.getFacetData(facetKey));\n",
       "      }\n",
       "    }\n",
       "\n",
       "    draw() {\n",
       "      for (let facetKey of this.facetKeys) {\n",
       "        this._facets.get(facetKey).draw();\n",
       "      }\n",
       "    }\n",
       "  }\n",
       "\n",
       "  // Class to accumulate and store all data\n",
       "  class LearningCurveData {\n",
       "    constructor(facetLabels, lineLabels, max_window_len) {\n",
       "      this.facetKeys = Object.keys(facetLabels);\n",
       "      this.lineKeys = Object.keys(lineLabels);\n",
       "      this.max_window_len = max_window_len\n",
       "\n",
       "      this.data = new Map();\n",
       "      for (const facetKey of this.facetKeys) {\n",
       "        this.data.set(facetKey, new Map());\n",
       "        for (const lineKey of this.lineKeys) {\n",
       "          this.data.get(facetKey).set(lineKey, []);\n",
       "        }\n",
       "      }\n",
       "    }\n",
       "\n",
       "    appendAll(rows) {\n",
       "      for (const facetKey of this.facetKeys) {\n",
       "        for (const lineKey of this.lineKeys) {\n",
       "          const storage = this.data.get(facetKey).get(lineKey);\n",
       "          for (const row of rows) {\n",
       "            storage.push({\n",
       "              x: row.x,\n",
       "              y: row.y[facetKey][lineKey]\n",
       "            });\n",
       "            if (storage.length > this.max_window_len) {\n",
       "              storage.shift();\n",
       "            }\n",
       "          }\n",
       "        }\n",
       "      }\n",
       "    }\n",
       "\n",
       "    getFacetData(facetKey) {\n",
       "      return this.data.get(facetKey);\n",
       "    }\n",
       "  }\n",
       "\n",
       "  window.setupLearningCurve = function (settings) {\n",
       "    const data = new LearningCurveData(settings.facetConfig, settings.lineConfig, settings.max_window_len);\n",
       "    const graph = new LearningCurvePlot({\n",
       "      container: document.getElementById(settings.id),\n",
       "      ...settings\n",
       "    });\n",
       "\n",
       "    let waitingForDrawing = false;\n",
       "    function drawer() {\n",
       "      waitingForDrawing = false;\n",
       "      graph.setData(data);\n",
       "      graph.draw();\n",
       "    }\n",
       "\n",
       "    window.appendLearningCurve = function (rows) {\n",
       "      data.appendAll(rows);\n",
       "\n",
       "      if (!waitingForDrawing) {\n",
       "        waitingForDrawing = true;\n",
       "        window.requestAnimationFrame(drawer);\n",
       "      }\n",
       "    };\n",
       "  };\n",
       "})();\n",
       "</script><svg id=\"c3b99d52-5537-439f-87bd-27ae75afecac\" class=\"learning-curve\"></svg><script>  window.setupLearningCurve({\"id\": \"c3b99d52-5537-439f-87bd-27ae75afecac\", \"width\": 600, \"height\": 1690, \"lineConfig\": {\"line-1\": {\"name\": \"line-1\", \"color\": \"#1f77b4\"}}, \"facetConfig\": {\"voltage\": {\"name\": \"voltage\", \"limit\": [null, null]}, \"ch2\": {\"name\": \"ch2\", \"limit\": [null, null]}, \"ch3\": {\"name\": \"ch3\", \"limit\": [null, null]}, \"ch4\": {\"name\": \"ch4\", \"limit\": [null, null]}, \"ch5\": {\"name\": \"ch5\", \"limit\": [null, null]}, \"ch6\": {\"name\": \"ch6\", \"limit\": [null, null]}, \"ch7\": {\"name\": \"ch7\", \"limit\": [null, null]}, \"temperature\": {\"name\": \"temperature\", \"limit\": [null, null]}}, \"xAxisConfig\": {\"name\": \"iteration\", \"limit\": [null, null]}, \"max_window_len\": 500});</script>"
      ],
      "text/plain": [
       "<IPython.core.display.HTML object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "data": {
      "application/javascript": [
       "window.appendLearningCurve([{\"x\": 4988.0, \"y\": {\"voltage\": {\"line-1\": 2.4938517205538417}, \"ch2\": {\"line-1\": -0.0009360910577882598}, \"ch3\": {\"line-1\": 0.004895568477579174}, \"ch4\": {\"line-1\": 0.0041429405382800745}, \"ch5\": {\"line-1\": -0.08166898270475659}, \"ch6\": {\"line-1\": 0.012037219051983244}, \"ch7\": {\"line-1\": 0.01214826251843721}, \"temperature\": {\"line-1\": 0.15754814833976608}}}, {\"x\": 4989.0, \"y\": {\"voltage\": {\"line-1\": 2.4938549392050433}, \"ch2\": {\"line-1\": -0.0009666682442031198}, \"ch3\": {\"line-1\": 0.005075276502999842}, \"ch4\": {\"line-1\": 0.004969061013348223}, \"ch5\": {\"line-1\": -0.08083910713661994}, \"ch6\": {\"line-1\": 0.012864948852652174}, \"ch7\": {\"line-1\": 0.012977601644706922}, \"temperature\": {\"line-1\": 0.15754922122349993}}}, {\"x\": 4990.0, \"y\": {\"voltage\": {\"line-1\": 2.493857084972511}, \"ch2\": {\"line-1\": -0.0008862019641640143}, \"ch3\": {\"line-1\": 0.0017648937421910456}, \"ch4\": {\"line-1\": 0.00047689681969843146}, \"ch5\": {\"line-1\": -0.08531571451612883}, \"ch6\": {\"line-1\": 0.008348108333123723}, \"ch7\": {\"line-1\": 0.008448959404106069}, \"temperature\": {\"line-1\": 0.15755136699096764}}}, {\"x\": 4991.0, \"y\": {\"voltage\": {\"line-1\": 2.4938517205538417}, \"ch2\": {\"line-1\": -0.0009060503132403271}, \"ch3\": {\"line-1\": 0.0014805795527195397}, \"ch4\": {\"line-1\": -0.0007354617995574235}, \"ch5\": {\"line-1\": -0.08650876122817532}, \"ch6\": {\"line-1\": 0.007160426039746527}, \"ch7\": {\"line-1\": 0.007248938947789544}, \"temperature\": {\"line-1\": 0.15754975766536686}}}, {\"x\": 4992.0, \"y\": {\"voltage\": {\"line-1\": 2.493850111228241}, \"ch2\": {\"line-1\": -0.0009178520343127291}, \"ch3\": {\"line-1\": 0.004465878542170351}, \"ch4\": {\"line-1\": 0.0034085516224565057}, \"ch5\": {\"line-1\": -0.08240927248111635}, \"ch6\": {\"line-1\": 0.011287809763885708}, \"ch7\": {\"line-1\": 0.011399926114073528}, \"temperature\": {\"line-1\": 0.15754439324669758}}}, {\"x\": 4993.0, \"y\": {\"voltage\": {\"line-1\": 2.493856012088777}, \"ch2\": {\"line-1\": -0.0009720326628723934}, \"ch3\": {\"line-1\": 0.004942775361868782}, \"ch4\": {\"line-1\": 0.005061865456326658}, \"ch5\": {\"line-1\": -0.08075220355417771}, \"ch6\": {\"line-1\": 0.01294756090015899}, \"ch7\": {\"line-1\": 0.013060750134080664}, \"temperature\": {\"line-1\": 0.1575465390141653}}}, {\"x\": 4994.0, \"y\": {\"voltage\": {\"line-1\": 2.4938608400655795}, \"ch2\": {\"line-1\": -0.0008867384060309417}, \"ch3\": {\"line-1\": 0.0022863152368444487}, \"ch4\": {\"line-1\": 0.0012922884574280331}, \"ch5\": {\"line-1\": -0.08451212459947165}, \"ch6\": {\"line-1\": 0.009162963528986398}, \"ch7\": {\"line-1\": 0.009264887483702598}, \"temperature\": {\"line-1\": 0.15754707545603222}}}]);"
      ],
      "text/plain": [
       "<IPython.core.display.Javascript object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "from portiloop.capture import Capture\n",
    "\n",
    "cap = Capture()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "4209ba44",
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3 (ipykernel)",
   "language": "python",
   "name": "python3"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.7.3"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 5
}