Empty Points in JavaScript Accumulation Chart control

23 Mar 2023 / 2 minutes to read

The data points those uses the null or undefined as value are considered as empty points. The empty data points are ignored and not plotted in the chart. You can customize those points, using the emptyPointSettings property in series. The default mode of the empty point is Gap. Other supported modes are Average and Zero.

Source

Preview

index.ts

index.html

import { AccumulationChart, AccumulationDataLabel } from '@syncfusion/ej2-charts';
AccumulationChart.Inject(AccumulationDataLabel);

let piechart: AccumulationChart = new AccumulationChart({
    series: [
        {
            dataSource: [{ x: 'Jan', y: 3 }, { x: 'Feb', y: 3.5 }, { x: 'Mar', y: undefined }, { x: 'Apr', y: 13.5 },
            { x: 'May', y: 19 }, { x: 'Jun', y: 23.5 }, { x: 'Jul', y: null }, { x: 'Aug', y: 25 },
            { x: 'Sep', y: 21 }, { x: 'Oct', y: 15 }],
            xName: 'x',
            yName: 'y',
            emptyPointSettings: { mode: 'Zero', fill: 'pink'},
            dataLabel: { visible: true, position: 'Outside' }
        }
    ]
}, '#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>
</head>

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

</html>

Customization

Specific color for an empty point can be set by using the fill property in emptyPointSettings and the border for an empty point can be set by using the border property.

Source

Preview

index.ts

index.html

import { AccumulationChart } from '@syncfusion/ej2-charts';
let piechart: AccumulationChart = new AccumulationChart({
    series: [
        {
            dataSource: [{ x: 'Jan', y: 3 }, { x: 'Feb', y: 3.5 }, { x: 'Mar', y: undefined }, { x: 'Apr', y: 13.5 },
            { x: 'May', y: 19 }, { x: 'Jun', y: 23.5 }, { x: 'Jul', y: null }, { x: 'Aug', y: 25 },
            { x: 'Sep', y: 21 }, { x: 'Oct', y: 15 }],
            emptyPointSettings: { mode: 'Average', fill: 'pink'}
            xName: 'x',
            yName: 'y'
        }
    ]
}, '#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>
</head>

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

</html>