73 lines
2.0 KiB
Markdown
73 lines
2.0 KiB
Markdown
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# Mixed Chart Types
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With Chart.js, it is possible to create mixed charts that are a combination of two or more different chart types. A common example is a bar chart that also includes a line dataset.
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Creating a mixed chart starts with the initialization of a basic chart.
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```javascript
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var myChart = new Chart(ctx, {
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type: 'bar',
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data: data,
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options: options
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});
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```
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At this point we have a standard bar chart. Now we need to convert one of the datasets to a line dataset.
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```javascript
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var mixedChart = new Chart(ctx, {
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type: 'bar',
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data: {
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datasets: [{
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label: 'Bar Dataset',
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data: [10, 20, 30, 40]
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}, {
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label: 'Line Dataset',
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data: [50, 50, 50, 50],
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// Changes this dataset to become a line
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type: 'line'
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}],
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labels: ['January', 'February', 'March', 'April']
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},
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options: options
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});
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```
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At this point we have a chart rendering how we'd like. It's important to note that the default options for a line chart are not merged in this case. Only the options for the default type are merged in. In this case, that means that the default options for a bar chart are merged because that is the type specified by the `type` field.
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{% chartjs %}
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{
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"type": "bar",
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"data": {
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"labels": [
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"January",
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"February",
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"March",
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"April"
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],
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"datasets": [{
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"label": "Bar Dataset",
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"data": [10, 20, 30, 40],
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"borderColor": "rgb(255, 99, 132)",
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"backgroundColor": "rgba(255, 99, 132, 0.2)"
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}, {
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"label": "Line Dataset",
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"data": [50, 50, 50, 50],
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"type": "line",
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"fill": false,
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"borderColor": "rgb(54, 162, 235)"
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}]
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},
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"options": {
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"scales": {
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"yAxes": [{
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"ticks": {
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"beginAtZero": true
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}
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}]
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}
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}
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}
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{% endchartjs %}
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