Logarithmic Scale
Documentation
In this demo, a logarithmic axis is used to select a range within a set of rapidly-growing values.
Feel free to share demo-related thoughts here.
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import React from 'react';
import RangeSelector, { Chart as RsChart, Series as RsSeries, Scale, Label as RsLabel, SliderMarker, Behavior } from 'devextreme-react/range-selector';
import Chart, { ArgumentAxis, Legend, Series, Label, Grid, MinorGrid } from 'devextreme-react/chart';
import { dataSource } from './data.js';
class App extends React.Component {
constructor(props) {
super(props);
this.state = {
range: []
};
this.updateRange = this.updateRange.bind(this);
}
render() {
return (
<React.Fragment>
<Chart
id="zoomed-chart"
dataSource={dataSource}
resizePanesOnZoom={true}
>
<Series />
<ArgumentAxis
visualRange={this.state.range}
valueMarginsEnabled={false}
minorTickCount={10}
type="logarithmic"
>
<Label format="exponential" />
<Grid visible={true} />
<MinorGrid visible={true} />
</ArgumentAxis>
<Legend visible={false} />
</Chart>
<RangeSelector
id="range-selector"
dataSource={dataSource}
onValueChanged={this.updateRange}
>
<RsChart>
<RsSeries />
</RsChart>
<Scale minRange={1} minorTickCount={10} type="logarithmic">
<RsLabel format="exponential" />
</Scale>
<SliderMarker format="exponential" />
<Behavior snapToTicks={false} callValueChanged="onMoving" />
</RangeSelector>
</React.Fragment>
);
}
updateRange(data) {
this.setState({
range: data.value
});
}
}
export default App;
import React from 'react';
import ReactDOM from 'react-dom';
import App from './App.js';
ReactDOM.render(
<App />,
document.getElementById('app')
);
<!DOCTYPE html>
<html>
<head>
<title>DevExtreme Demo</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.6/css/dx.common.css" />
<link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/20.2.6/css/dx.light.css" />
<link rel="stylesheet" type ="text/css" href="styles.css" />
<script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
<script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script>
<script type="text/javascript" src="config.js"></script>
<script type="text/javascript">
System.import('./index.js');
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<div id="app"></div>
</div>
</body>
</html>
#zoomed-chart{
height: 335px;
margin: 0 0 15px;
}
#range-selector {
height: 120px;
}
const data = [];
for (var i = 0; i < 100; i++) {
data.push({
arg: Math.pow(10, i * 0.1),
val: Math.log(i + 1) / Math.log(0.5) + (Math.random() - 0.5) * (100 / (i + 1)) + 10 });
}
export const dataSource = data;
System.config({
transpiler: 'plugin-babel',
meta: {
'devextreme/localization.js': {
"esModule": true
},
},
paths: {
'npm:': 'https://unpkg.com/'
},
defaultExtension: 'js',
map: {
'react': 'npm:react@16.14.0/umd/react.development.js',
'react-dom': 'npm:react-dom@16.14.0/umd/react-dom.development.js',
'prop-types': 'npm:prop-types@15.7.2/prop-types.js',
'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.26.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@20.2.6',
'devextreme-react': 'npm:devextreme-react@20.2.6',
'jszip': 'npm:jszip@3.6.0/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@0.10.3/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.0.18/dist/dx-diagram.js',
'devexpress-gantt': 'npm:devexpress-gantt@2.0.24/dist/dx-gantt.js',
'preact': 'npm:preact@10.5.13/dist/preact.js',
'preact/hooks': 'npm:preact@10.5.13/hooks/dist/hooks.js',
// SystemJS plugins
'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js',
'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js'
},
packages: {
'devextreme': {
defaultExtension: 'js'
},
'devextreme-react': {
main: 'index.js'
},
'devextreme/events/utils': {
main: 'index'
},
'devextreme/events': {
main: 'index'
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js'
}
},
babelOptions: {
sourceMaps: false,
stage0: true,
react: true
}
});