Heat map

author(s): Torstein Hønsi

by fujigoko

HTML

<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/modules/heatmap.js"></script>
<script src="https://code.highcharts.com/modules/exporting.js"></script>
<script src="https://code.highcharts.com/modules/export-data.js"></script>
<script src="https://code.highcharts.com/modules/accessibility.js"></script>

<figure class="highcharts-figure">
    <div id="container"></div>
</figure>

CSS

.highcharts-figure,
.highcharts-data-table table {
    min-width: 360px;
    max-width: 800px;
    margin: 1em auto;
}

.highcharts-data-table table {
    font-family: Verdana, sans-serif;
    border-collapse: collapse;
    border: 1px solid #ebebeb;
    margin: 10px auto;
    text-align: center;
    width: 100%;
    max-width: 500px;
}

.highcharts-data-table caption {
    padding: 1em 0;
    font-size: 1.2em;
    color: #555;
}

.highcharts-data-table th {
    font-weight: 600;
    padding: 0.5em;
}

.highcharts-data-table td,
.highcharts-data-table th,
.highcharts-data-table caption {
    padding: 0.5em;
}

.highcharts-data-table thead tr,
.highcharts-data-table tr:nth-child(even) {
    background: #f8f8f8;
}

.highcharts-data-table tr:hover {
    background: #f1f7ff;
}

JavaScript

function getPointCategoryName(point, dimension) {
  var series = point.series,
    isY = dimension === 'y',
    axis = series[isY ? 'yAxis' : 'xAxis'];
  return axis.categories[point[isY ? 'y' : 'x']];
}

Highcharts.chart('container', {

  chart: {
    type: 'heatmap',
    marginTop: 40,
    marginBottom: 80,
    plotBorderWidth: 1
  },

  xAxis: {
    type: 'datetime',
    min: Date.UTC(2023, 9, 1),
    max: Date.UTC(2023, 9, 5),
    labels: {
      align: 'center'
    }
  },

  yAxis: {
    type: 'datetime'
  },

  colorAxis: {
    min: 0,
    minColor: '#FFFFFF',
    maxColor: Highcharts.getOptions().colors[0]
  },

  legend: {
    align: 'right',
    layout: 'vertical',
    margin: 0,
    verticalAlign: 'top',
    y: 25,
    symbolHeight: 280
  },

  tooltip: {
    formatter: function() {
      return '<b>' + getPointCategoryName(this.point, 'x') + '</b> sold <br><b>' +
        this.point.value + '</b> items on <br><b>' + getPointCategoryName(this.point, 'y') + '</b>';
    }
  },

  series: [{
    data: [
      [Date.UTC(2023, 9, 1), Date.UTC(2023, 9, 1), 15],
      [Date.UTC(2023, 9, 1), Date.UTC(2023, 9, 2), 30],
      [Date.UTC(2023, 9, 1), Date.UTC(2023, 9, 3), 45],
      [Date.UTC(2023, 9, 1), Date.UTC(2023, 9, 4), 60],
      [Date.UTC(2023, 9, 1), Date.UTC(2023, 9, 5), 75],
      [Date.UTC(2023, 9, 2), Date.UTC(2023, 9, 1), 0],
      [Date.UTC(2023, 9, 2), Date.UTC(2023, 9, 2), 15],
      [Date.UTC(2023, 9, 2), Date.UTC(2023, 9, 3), 30],
      [Date.UTC(2023, 9, 2), Date.UTC(2023, 9, 4), 45],
      [Date.UTC(2023, 9, 2), Date.UTC(2023, 9, 5), 60],
      [Date.UTC(2023, 9, 3), Date.UTC(2023, 9, 1), 0],
      [Date.UTC(2023, 9, 3), Date.UTC(2023, 9, 2), 0],
      [Date.UTC(2023, 9, 3), Date.UTC(2023, 9, 3), 15],
      [Date.UTC(2023, 9, 3), Date.UTC(2023, 9, 4), 30],
      [Date.UTC(2023, 9, 3), Date.UTC(2023, 9, 5), 45],
      [Date.UTC(2023, 9, 4), Date.UTC(2023, 9, 1), 0],
      [Date.UTC(2023, 9, 4), Date.UTC(2023, 9, 2), 0],
      [Date.UTC(2023, 9,...