Histogram Chart in EJ2 TypeScript control

13 Dec 202415 minutes to read

Histogram

To render a histogram series in your chart, you need to follow a few steps to configure it correctly. Here’s a concise guide on how to do this:

Set the series type: Define the series type as Histogram in your chart configuration. This indicates that the data should be represented as a histogram chart, providing a visual display of large amounts of data that are difficult to understand in a tabular or spreadsheet format.
Inject the HistogramSeries module: Use the Chart.Inject(HistogramSeries) method to inject the HistogramSeries module into your chart. This step is essential, as it ensures that the necessary functionalities for rendering histogram series are available in your chart.

index.ts
index.html
datasource.ts
import {  Chart, HistogramSeries } from '@syncfusion/ej2-charts';
import { points } from './datasource.ts';
Chart.Inject(HistogramSeries);

let chartData: Object[] = [];
points.map((value: number) => {
    chartData.push({
        y: value
    });
});
let chart: Chart = new Chart({
    primaryXAxis: {
        minimum: 0, 
        maximum: 100
    },
    primaryYAxis: {
        minimum: 0, 
        maximum: 50, 
        interval: 10
    },
    series: [
        {
            dataSource: chartData,
            type: 'Histogram', 
            width: 2, 
            yName: 'y',
            binInterval: 20,
            showNormalDistribution: true, 
            columnWidth: 0.99
        }
    ]
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>
export let points: number[] = [5.250, 7.750, 0, 8.275, 9.750, 7.750, 8.275, 6.250, 5.750,
    5.250, 23.000, 26.500, 27.750, 25.025, 26.500, 26.500, 28.025, 29.250, 26.750, 27.250,
    26.250, 25.250, 34.500, 25.625, 25.500, 26.625, 36.275, 36.250, 26.875, 40.000, 43.000,
    46.500, 47.750, 45.025, 56.500, 56.500, 58.025, 59.250, 56.750, 57.250,
    46.250, 55.250, 44.500, 45.525, 55.500, 46.625, 46.275, 56.250, 46.875, 43.000,
    46.250, 55.250, 44.500, 45.425, 55.500, 56.625, 46.275, 56.250, 46.875, 43.000,
    46.250, 55.250, 44.500, 45.425, 55.500, 46.625, 56.275, 46.250, 56.875, 41.000, 63.000,
    66.500, 67.750, 65.025, 66.500, 76.500, 78.025, 79.250, 76.750, 77.250,
    66.250, 75.250, 74.500, 65.625, 75.500, 76.625, 76.275, 66.250, 66.875, 80.000, 85.250,
    87.750, 89.000, 88.275, 89.750, 97.750, 98.275, 96.250, 95.750, 95.250
];

Events

Series render

The seriesRender event allows you to customize series properties, such as data, fill, and name, before they are rendered on the chart.

index.ts
index.html
datasource.ts
import {  Chart, HistogramSeries, ISeriesRenderEventArgs } from '@syncfusion/ej2-charts';
import { points } from './datasource.ts';
Chart.Inject(HistogramSeries);

let chartData: Object[] = [];
points.map((value: number) => {
    chartData.push({
        y: value
    });
});
let chart: Chart = new Chart({
    primaryXAxis: {
        minimum: 0, 
        maximum: 100
    },
    primaryYAxis: {
        minimum: 0, 
        maximum: 50, 
        interval: 10
    },
    series: [
        {
            dataSource: chartData,
            type: 'Histogram', 
            width: 2, 
            yName: 'y',
            binInterval: 20,
            showNormalDistribution: true, 
            columnWidth: 0.99
        }
    ],
    seriesRender: (args: ISeriesRenderEventArgs) => {
        args.fill = '#ff6347';
    }
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>
export let points: number[] = [5.250, 7.750, 0, 8.275, 9.750, 7.750, 8.275, 6.250, 5.750,
    5.250, 23.000, 26.500, 27.750, 25.025, 26.500, 26.500, 28.025, 29.250, 26.750, 27.250,
    26.250, 25.250, 34.500, 25.625, 25.500, 26.625, 36.275, 36.250, 26.875, 40.000, 43.000,
    46.500, 47.750, 45.025, 56.500, 56.500, 58.025, 59.250, 56.750, 57.250,
    46.250, 55.250, 44.500, 45.525, 55.500, 46.625, 46.275, 56.250, 46.875, 43.000,
    46.250, 55.250, 44.500, 45.425, 55.500, 56.625, 46.275, 56.250, 46.875, 43.000,
    46.250, 55.250, 44.500, 45.425, 55.500, 46.625, 56.275, 46.250, 56.875, 41.000, 63.000,
    66.500, 67.750, 65.025, 66.500, 76.500, 78.025, 79.250, 76.750, 77.250,
    66.250, 75.250, 74.500, 65.625, 75.500, 76.625, 76.275, 66.250, 66.875, 80.000, 85.250,
    87.750, 89.000, 88.275, 89.750, 97.750, 98.275, 96.250, 95.750, 95.250
];

Point render

The pointRender event allows you to customize each data point before it is rendered on the chart.

index.ts
index.html
datasource.ts
import { Chart, HistogramSeries, IPointRenderEventArgs } from '@syncfusion/ej2-charts';
import { points } from './datasource.ts';
Chart.Inject(HistogramSeries);

let chartData: Object[] = [];
points.map((value: number) => {
    chartData.push({
        y: value
    });
});
let chart: Chart = new Chart({
    primaryXAxis: {
        minimum: 0,
        maximum: 100
    },
    primaryYAxis: {
        minimum: 0,
        maximum: 50,
        interval: 10
    },
    series: [
        {
            dataSource: chartData,
            type: 'Histogram',
            width: 2,
            yName: 'y',
            binInterval: 20,
            showNormalDistribution: true,
            columnWidth: 0.99
        }
    ],
    pointRender: (args: IPointRenderEventArgs) => {
        if (args.point.y >= 15) {
            args.fill = '#ff6347';
        } else {
            args.fill = '#009cb8';
        }
    }
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>
export let points: number[] = [5.250, 7.750, 0, 8.275, 9.750, 7.750, 8.275, 6.250, 5.750,
    5.250, 23.000, 26.500, 27.750, 25.025, 26.500, 26.500, 28.025, 29.250, 26.750, 27.250,
    26.250, 25.250, 34.500, 25.625, 25.500, 26.625, 36.275, 36.250, 26.875, 40.000, 43.000,
    46.500, 47.750, 45.025, 56.500, 56.500, 58.025, 59.250, 56.750, 57.250,
    46.250, 55.250, 44.500, 45.525, 55.500, 46.625, 46.275, 56.250, 46.875, 43.000,
    46.250, 55.250, 44.500, 45.425, 55.500, 56.625, 46.275, 56.250, 46.875, 43.000,
    46.250, 55.250, 44.500, 45.425, 55.500, 46.625, 56.275, 46.250, 56.875, 41.000, 63.000,
    66.500, 67.750, 65.025, 66.500, 76.500, 78.025, 79.250, 76.750, 77.250,
    66.250, 75.250, 74.500, 65.625, 75.500, 76.625, 76.275, 66.250, 66.875, 80.000, 85.250,
    87.750, 89.000, 88.275, 89.750, 97.750, 98.275, 96.250, 95.750, 95.250
];

Histogram Chart in EJ2 TypeScript control

Histogram

Events

Series render

Point render

See also