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Numeric Axis in JavaScript Chart control

08 May 2023 / 6 minutes to read

You can use numeric axis to represent numeric values of data in chart. By default, the valueType of an axis is Double.

Source

Preview

index.ts

index.html

import { Chart, LineSeries } from '@syncfusion/ej2-charts';
Chart.Inject(LineSeries);
let chartData: any[] = [{ x: 1, y: 7 }, { x: 2, y: 1 }, { x: 3, y: 1 }, { x: 4, y: 14 }, { x: 5, y: 1 }, { x: 6, y: 10 },
    { x: 7, y: 8 }, { x: 8, y: 6 }, { x: 9, y: 10 }, { x: 10, y: 10 }, { x: 11, y: 16 }, { x: 12, y: 6 },
    { x: 13, y: 14 }, { x: 14, y: 7 }, { x: 15, y: 5 }, { x: 16, y: 2 }, { x: 17, y: 14 }, { x: 18, y: 7 },
    { x: 19, y: 7 }, { x: 20, y: 10 }];
let chart: Chart = new Chart({
    primaryXAxis: {
        // Numerical scale in primary X Axis
        valueType: 'Double',
    },
    series:[{
        dataSource: chartData,
        xName: 'x', yName: 'y',
        type: 'Line'
    }],

}, '#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>

Range

Range of an axis, will be calculated automatically based on the provided data, you can also customize the range of the axis using minimum, maximum and interval property of the axis.

Source

Preview

index.ts

index.html

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

let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'Double',
        // Numeric axis range
        minimum: 1,
        maximum: 20,
        interval: 5
    },
    series:[{
        dataSource: numericData,
        xName: 'x', yName: 'y',
        type: 'Line'
    }],

}, '#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>

Range Padding

Padding can be applied to the minimum and maximum extremes of an axis range by using the rangePadding property. Numeric axis supports the following types of padding.

None
Round
Additional
Normal
Auto

Numeric - None

When the rangePadding is set to None, minimum and maximum of the axis is based on the data.

Source

Preview

index.ts

index.html

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

let chart: Chart = new Chart({
primaryXAxis: {
    valueType: 'Double',
},
primaryYAxis: {
    //RangePadding as none in Y Axis
    rangePadding: 'None'
},
series:[{
    dataSource: numericData,
    xName: 'x', yName: 'y',
    type: 'Line'
}],

}, '#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>

Numeric - Round

When the rangePadding is set to Round, minimum and maximum will be rounded to the nearest possible value, which is divisible by interval. For example, when the minimum is 3.5 and the interval is 1, then the minimum will be rounded to 3.

Source

Preview

index.ts

index.html

import { Chart, LineSeries } from '@syncfusion/ej2-charts';
import { numericData } from './datasource.ts';
Chart.Inject(LineSeries);
let chart: Chart = new Chart({
primaryXAxis: {
    valueType: 'Double',
 },
primaryYAxis: {
    rangePadding: 'Round'
},
series:[{
    dataSource: numericData,
    xName: 'x', yName: 'y',
    type: 'Line'
}],

}, '#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>

Numeric - Additional

When the rangePadding is set to Additional, interval of an axis will be added to the minimum and maximum of the axis.

Source

Preview

index.ts

index.html

import { Chart, LineSeries } from '@syncfusion/ej2-charts';
import { numericData } from './datasource.ts';
Chart.Inject(LineSeries);
let chart: Chart = new Chart({
primaryXAxis: {
    valueType: 'Double',
 },
primaryYAxis: {
    rangePadding: 'Additional'
},
series:[{
    dataSource: numericData,
    xName: 'x', yName: 'y',
    type: 'Line'
}],

}, '#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>

Numeric - Normal

When the rangePadding is set to Normal, padding is applied to the axis based on default range calculation.

Source

Preview

index.ts

index.html

import { Chart, LineSeries } from '@syncfusion/ej2-charts';
import { numericData } from './datasource.ts';
Chart.Inject(LineSeries);
let chart: Chart = new Chart({
primaryXAxis: {
    valueType: 'Double',
},
primaryYAxis: {
    rangePadding: 'Normal'
},
series:[{
    dataSource: numericData,
    xName: 'x', yName: 'y',
    type: 'Line'
}],

}, '#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>

Numeric - Auto

When the rangePadding is set to Auto, horizontal numeric axis takes None as padding calculation, while the vertical numeric axis takes Normal as padding calculation.

Source

Preview

index.ts

index.html

import { Chart, LineSeries } from '@syncfusion/ej2-charts';
import { numericData } from './datasource.ts';
Chart.Inject(LineSeries);
let chart: Chart = new Chart({
primaryXAxis: {
    valueType: 'Double',
    // Set the rangePadding as auto in X Axis
    rangePadding: 'Auto'
},
primaryYAxis: {
    valueType: 'Double',
    // Set the rangePadding as auto in Y Axis
    rangePadding: 'Auto'
},
series:[{
    dataSource: numericData,
    xName: 'x', yName: 'y',
    type: 'Line'
}],

}, '#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>

Label Format

Numeric Label Format

Numeric labels can be formatted by using the labelFormat property. Numeric labels supports all globalize format.

Source

Preview

index.ts

index.html

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

let chart: Chart = new Chart({
primaryYAxis: {
    //Label format as currency
    labelFormat: 'c'
},
series:[{
    dataSource: numericData,
    xName: 'x', yName: 'y',
    type: 'Line'
}],

}, '#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>

The following table describes the result of applying some commonly used label formats on numeric values.

Label Value	Label Format property value	Result	Description
1000	n1	1000.0	The Number is rounded to 1 decimal place
1000	n2	1000.00	The Number is rounded to 2 decimal place
1000	n3	1000.000	The Number is rounded to 3 decimal place
0.01	p1	1.0%	The Number is converted to percentage with 1 decimal place
0.01	p2	1.00%	The Number is converted to percentage with 2 decimal place
0.01	p3	1.000%	The Number is converted to percentage with 3 decimal place
1000	c1	* 000.0	The Currency symbol is appended to number and number is rounded to 1 decimal place
1000	c2	* 000.00	The Currency symbol is appended to number and number is rounded to 2 decimal place

GroupingSeparator

To separate groups of thousands, use useGroupingSeparator property in chart.

Source

Preview

index.ts

index.html

import { Chart, ColumnSeries } from '@syncfusion/ej2-charts';
import { groupingData } from './datasource.ts';
Chart.Inject(ColumnSeries);

let chart: Chart = new Chart({
series:[{
    dataSource: groupingData,
    xName: 'x', yName: 'y',
    type: 'Column'
}],
useGroupingSeparator: true
}, '#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>

Custom Label Format

Axis also supports custom label format using placeholder like {value}°C, in which the value represent the axis label e.g 20°C.

Source

Preview

index.ts

index.html

import { Chart, ColumnSeries } from '@syncfusion/ej2-charts';
import { numericData } from './datasource.ts';
Chart.Inject(ColumnSeries);

let chart: Chart = new Chart({
primaryYAxis: {
    // Custom label format
    labelFormat: '${value}K'
},
series:[{
    dataSource: numericData,
    xName: 'x', yName: 'y',
    type: 'Column'
}],

}, '#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>

Contents

Range
Range Padding
Label Format
GroupingSeparator
Custom Label Format

Contents

Range
Range Padding
Label Format
GroupingSeparator
Custom Label Format