Radar Chart in EJ2 TypeScript control

13 Dec 202424 minutes to read

Radar chart

To render a radar 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 Radar in your chart configuration. This indicates that the data should be represented as a radar chart, which is ideal for plotting data points on a circular grid.
Inject the RadarSeries module: Use the Chart.Inject(RadarSeries) method to inject the RadarSeries module into your chart. This step is essential, as it ensures that the necessary functionalities for rendering radar series are available in your chart.

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

let chart: Chart = new Chart({
    primaryXAxis: {
        title: 'Year'
    },
    primaryYAxis: {
        title: 'Efficiency',
        labelFormat: '{value}%'
    },
    series:[{
        dataSource: chartData, xName: 'x', yName: 'y',
        //Series type as polar
        type: 'Radar', width:2,
        // Series draw type as line
        drawType: 'Line'
    }],
    title: 'Efficiency of oil-fired power production'
}, '#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 chartData: object[] = [
    { x: 2005, y: 28 }, 
    { x: 2006, y: 25 },
    { x: 2007, y: 26 }, 
    { x: 2008, y: 27 },
    { x: 2009, y: 32 }, 
    { x: 2010, y: 35 }, 
    { x: 2011, y: 30 }
];

Draw type

Similar to the polar chart, use the drawType property to change the series plotting type in a Radar chart to line, column, area, range column, spline, scatter, stacking area, spline area, or stacking column. The default value of drawType is Line.

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

let chart: Chart = new Chart({
    primaryXAxis: {
        title: 'Year'
    },
    primaryYAxis: {
        title: 'Efficiency',
        labelFormat: '{value}%'
    },
    series:[{
        dataSource: chartData, xName: 'x', yName: 'y',
        //Series type as polar
        type: 'Radar', width:2,
        // Series draw type as line
        drawType: 'Line'
    }],
    title: 'Efficiency of oil-fired power production'
}, '#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 chartData: object[] = [
    { x: 2005, y: 28 }, 
    { x: 2006, y: 25 },
    { x: 2007, y: 26 }, 
    { x: 2008, y: 27 },
    { x: 2009, y: 32 }, 
    { x: 2010, y: 35 }, 
    { x: 2011, y: 30 }
];

Binding data with series

You can bind data to the chart using the dataSource property within the series configuration. This allows you to connect a JSON dataset or remote data to your chart. To display the data correctly, map the fields from the data to the chart series xName and yName properties.

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

let chart: Chart = new Chart({
    primaryXAxis: {
        title: 'Year'
    },
    primaryYAxis: {
        title: 'Efficiency',
        labelFormat: '{value}%'
    },
    series:[{
        dataSource: chartData, xName: 'x', yName: 'y',
        //Series type as polar
        type: 'Radar', width:2,
        // Series draw type as line
        drawType: 'Line'
    }],
    title: 'Efficiency of oil-fired power production'
}, '#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 chartData: object[] = [
    { x: 2005, y: 28 }, 
    { x: 2006, y: 25 },
    { x: 2007, y: 26 }, 
    { x: 2008, y: 27 },
    { x: 2009, y: 32 }, 
    { x: 2010, y: 35 }, 
    { x: 2011, y: 30 }
];

Customization

Start angle

You can customize the start angle of the radar series using startAngle property. By default, startAngle is 0 degree.

index.ts
index.html
datasource.ts
import { Chart, Category, RadarSeries, ColumnSeries } from '@syncfusion/ej2-charts';
import { chartData } from './datasource.ts';
Chart.Inject(Category, RadarSeries, ColumnSeries);

let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Countries',
        startAngle: 120
    },
    primaryYAxis: {
        title: 'Medals'
    },
    series: [{
        dataSource: chartData,
        xName: 'country', yName: 'gold',
        // Series type as polar series
        type: 'Radar',
        // Series draw type as column series
        drawType: 'Column'
    }],
    title: 'Olympic Medals'
}, '#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 chartData: Object[] = [
    { country: "USA",       gold: 50 },
    { country: "China",     gold: 40 },
    { country: "Japan",     gold: 70 },
    { country: "Australia", gold: 60 },
    { country: "France",    gold: 50 },
    { country: "Germany",   gold: 40 },
    { country: "Italy",     gold: 40 },
    { country: "Sweden",    gold: 30 }
];

Radius

You can customize the radius of the radar series using coefficient property. By default, coefficient is 100.

index.ts
index.html
datasource.ts
import { Chart, Category, RadarSeries, ColumnSeries } from '@syncfusion/ej2-charts';
import { chartData } from './datasource.ts';
Chart.Inject(Category, RadarSeries, ColumnSeries);

let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Countries',
        coefficient: 80
    },
    primaryYAxis: {
        title: 'Medals'
    },
    series:[{
        dataSource: chartData,
        xName: 'country', yName: 'gold',
        // Series type as polar series
        type: 'Radar',
        // Series draw type as column series
        drawType: 'Column'
    }],
    title: 'Olympic Medals'
}, '#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 chartData: Object[] = [
    { country: "USA",       gold: 50 },
    { country: "China",     gold: 40 },
    { country: "Japan",     gold: 70 },
    { country: "Australia", gold: 60 },
    { country: "France",    gold: 50 },
    { country: "Germany",   gold: 40 },
    { country: "Italy",     gold: 40 },
    { country: "Sweden",    gold: 30 }
];

Empty points

Data points with null or undefined values are considered empty. Empty data points are ignored and not plotted on the chart.

Mode

Use the mode property to define how empty or missing data points are handled in the series. The default mode for empty points is Gap.

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

let chart: Chart = new Chart({
    primaryXAxis: {
        title: 'Year'
    },
    primaryYAxis: {
        title: 'Efficiency',
        labelFormat: '{value}%'
    },
    series:[{
        dataSource: chartData, xName: 'x', yName: 'y',
        //Series type as polar
        type: 'Radar', width:2,
        // Series draw type as line
        drawType: 'Line',
        emptyPointSettings: {
            mode: 'Zero'
        }
    }],
    title: 'Efficiency of oil-fired power production'
}, '#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 chartData: object[] = [
    { x: 2005, y: 28 }, 
    { x: 2006, y: 25 },
    { x: 2007, y: 26 }, 
    { x: 2008, y: null },
    { x: 2009, y: 32 }, 
    { x: 2010, y: 35 }, 
    { x: 2011, y: 30 }
];

Fill

Use the fill property to customize the fill color of empty points in the series.

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

let chart: Chart = new Chart({
    primaryXAxis: {
        title: 'Year'
    },
    primaryYAxis: {
        title: 'Efficiency',
        labelFormat: '{value}%'
    },
    series:[{
        dataSource: chartData, xName: 'x', yName: 'y',
        //Series type as polar
        type: 'Radar', width:2,
        // Series draw type as line
        drawType: 'Line',
        marker: { visible: true, width: 7, height: 7, isFilled: true },
        emptyPointSettings: {
            mode: 'Zero',
            fill: 'red'
        }
    }],
    title: 'Efficiency of oil-fired power production'
}, '#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 chartData: object[] = [
    { x: 2005, y: 28 }, 
    { x: 2006, y: 25 },
    { x: 2007, y: 26 }, 
    { x: 2008, y: null },
    { x: 2009, y: 32 }, 
    { x: 2010, y: 35 }, 
    { x: 2011, y: 30 }
];

Border

Use the border property to customize the width and color of the border for empty points.

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

let chart: Chart = new Chart({
    primaryXAxis: {
        title: 'Year'
    },
    primaryYAxis: {
        title: 'Efficiency',
        labelFormat: '{value}%'
    },
    series:[{
        dataSource: chartData, xName: 'x', yName: 'y',
        //Series type as polar
        type: 'Radar', width:2,
        // Series draw type as line
        drawType: 'Line',
        marker: { visible: true, width: 7, height: 7, isFilled: true },
        emptyPointSettings: {
            mode: 'Zero',
            fill: 'red',
            border: { width: 2, color: 'blue' }
        }
    }],
    title: 'Efficiency of oil-fired power production'
}, '#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 chartData: object[] = [
    { x: 2005, y: 28 }, 
    { x: 2006, y: 25 },
    { x: 2007, y: 26 }, 
    { x: 2008, y: null },
    { x: 2009, y: 32 }, 
    { x: 2010, y: 35 }, 
    { x: 2011, y: 30 }
];

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, LineSeries, RadarSeries, ISeriesRenderEventArgs } from '@syncfusion/ej2-charts';
import { chartData } from './datasource.ts';
Chart.Inject(LineSeries, RadarSeries);

let chart: Chart = new Chart({
    primaryXAxis: {
        title: 'Year'
    },
    primaryYAxis: {
        title: 'Efficiency',
        labelFormat: '{value}%'
    },
    series:[{
        dataSource: chartData, xName: 'x', yName: 'y',
        //Series type as polar
        type: 'Radar', width:2,
        // Series draw type as line
        drawType: 'Line'
    }],
    title: 'Efficiency of oil-fired power production',
    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 chartData: object[] = [
    { x: 2005, y: 28 }, 
    { x: 2006, y: 25 },
    { x: 2007, y: 26 }, 
    { x: 2008, y: 27 },
    { x: 2009, y: 32 }, 
    { x: 2010, y: 35 }, 
    { x: 2011, y: 30 }
];

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, LineSeries, RadarSeries, IPointRenderEventArgs } from '@syncfusion/ej2-charts';
import { chartData } from './datasource.ts';
Chart.Inject(LineSeries, RadarSeries);

let chart: Chart = new Chart({
    primaryXAxis: {
        title: 'Year'
    },
    primaryYAxis: {
        title: 'Efficiency',
        labelFormat: '{value}%'
    },
    series:[{
        dataSource: chartData, xName: 'x', yName: 'y',
        //Series type as polar
        type: 'Radar', width:2,
        // Series draw type as line
        drawType: 'Line',
        marker: { visible: true }
    }],
    title: 'Efficiency of oil-fired power production',
    pointRender: (args: IPointRenderEventArgs) => {
        if (args.point.index % 2 !== 0) {
            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 chartData: object[] = [
    { x: 2005, y: 28 }, 
    { x: 2006, y: 25 },
    { x: 2007, y: 26 }, 
    { x: 2008, y: 27 },
    { x: 2009, y: 32 }, 
    { x: 2010, y: 35 }, 
    { x: 2011, y: 30 }
];