Radar Chart in EJ2 JavaScript control

28 Sep 202310 minutes to read

Radar Chart

To render a radar series, use series type as Radar and inject PolarSeries module using Chart.Inject(RadarSeries) method.

Draw Type

similar to Polar drawType, Radar draw property is used to change the series plotting type to line, column, area, range column, spline, scatter, stacking area and stacking column. The default value of drawType is Line.

var chartData = [
    { 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 }
];
var chart = new ej.charts.Chart({
    primaryXAxis: {
        title: 'Year',
        minimum: 2004, maximum: 2012, interval: 1
    },
    primaryYAxis: {
        minimum: 20, maximum: 40, interval: 5,
        title: 'Efficiency',
        labelFormat: '{value}%'
    },
    series:[{
        dataSource: chartData, width:2,
        xName: 'x', yName: 'y',
        name: 'India',
        //Series type as polar
        type: 'Radar',
        // 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://cdn.syncfusion.com/ej2/23.2.4/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    
    <div id="container">
        <div id="element"></div>
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
      </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

Customization

Start Angle

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

var data = [
    { 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 }
];
var chart = new ej.charts.Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Countries',
        startAngle: 90,
    },
    primaryYAxis: {
        minimum: 0, maximum: 80,
        interval: 20, title: 'Medals'
    },
    series: [{
        dataSource: data,
        xName: 'country', yName: 'gold',
        name: 'Gold',
        // Series type as radar 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://cdn.syncfusion.com/ej2/23.2.4/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    
    <div id="container">
        <div id="element"></div>
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
      </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

Radius

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

var data = [
      { 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 }
];
var chart = new ej.charts.Chart({
    primaryXAxis: {
        valueType: 'Category',
        title: 'Countries',
        coefficient: 80
    },
    primaryYAxis: {
        minimum: 0, maximum: 80,
        interval: 20, title: 'Medals'
    },
    series:[{
        dataSource: data,
        xName: 'country', yName: 'gold',
        name: 'Gold',
        // Series type as radar 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://cdn.syncfusion.com/ej2/23.2.4/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    
    <div id="container">
        <div id="element"></div>
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
      </script>
<script src="index.js" type="text/javascript"></script>
</body></html>

See Also