Error Bars (React)

The ErrorBar class extends the regular Series class to provide error bars that can be added on top of the regular series data.

Learn about FlexChart | Error Bars Documentation | FlexChart API Reference

This example uses React.

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import ReactDOM from 'react-dom/client'; import React, { useState } from 'react'; import useEvent from 'react-use-event-hook'; import { isArray } from '@mescius/wijmo'; import { Palettes } from '@mescius/wijmo.chart'; import * as wjInput from '@mescius/wijmo.react.input'; import * as wjChart from '@mescius/wijmo.react.chart'; import * as wjChartAnalytics from '@mescius/wijmo.react.chart.analytics'; import './app.css'; import { getData, getComboData } from './data'; function App() { const [state, setState] = useState({ data: getData(), comboData: getComboData(), chartTypes: ['Column', 'Bar', 'Scatter', 'Line', 'LineSymbols', 'Area', 'Spline', 'SplineSymbols', 'SplineArea'], chartType: 'Column', errorValue: null, errorMode: 'Custom', palette: (() => { // Get random palette let palettes = Object.keys(Palettes).filter(prop => isArray(Palettes[prop])); let rand = Math.floor(Math.random() * palettes.length); // return Palettes[palettes[rand]]; })() }); const randomizeData = useEvent(() => { setState(Object.assign(Object.assign({}, state), { data: getData() })); }); const onChartTypeChanged = useEvent((sender) => { setState(Object.assign(Object.assign({}, state), { chartType: sender.selectedValue })); }); const onErrorChanged = useEvent((sender) => { setState(Object.assign(Object.assign({}, state), { errorValue: sender.selectedItem.value, errorMode: sender.selectedItem.mode })); }); return (<div className="container-fluid"> <div className="form-group"> <label htmlFor="chartType">Chart Type:</label> <wjInput.ComboBox id="chartType" itemsSource={state.chartTypes} selectedIndexChanged={onChartTypeChanged}> </wjInput.ComboBox> </div> <div className="form-group"> <label htmlFor="error">Error</label> <wjInput.ComboBox id="error" displayMemberPath="hdr" itemsSource={state.comboData} selectedIndexChanged={onErrorChanged}> </wjInput.ComboBox> </div> <div className="form-group"> <label htmlFor="btnRandomize">Randomize Data</label> <button id="btnRandomize" className="btn btn-default" onClick={randomizeData}> Go </button> </div> <wjChart.FlexChart bindingX="date" itemsSource={state.data} palette={state.palette} chartType={state.chartType}> <wjChartAnalytics.FlexChartErrorBar binding={state.errorValue ? 'amount' : 'amount,errorPlus,errorMinus'} name="Sales" groupWidth={0.7} gapWidth={0.2} errorBarStyle={{ stroke: 'darkred', strokeWidth: 3 }} value={state.errorValue} errorAmount={state.errorMode}> </wjChartAnalytics.FlexChartErrorBar> </wjChart.FlexChart> </div>); } const container = document.getElementById('app'); if (container) { const root = ReactDOM.createRoot(container); root.render(<App />); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo Wijmo FlexChart ErrorBar</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.40/system.src.js" integrity="sha512-G6mEj6h18+m3MvzdviSDfPle/TfH0//cXcB33AKlNR/Rha0yQsKefDZKRTkIZos97HEGq2JMV1RT5ybMoQ3WsQ==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div id="app"></div> </body> </html>
.wj-flexchart { height: 250px; margin: 10px 0; } label { margin-right: 3px; }
import * as wijmo from '@mescius/wijmo'; export function getData() { let arr = [], date = new Date(); // for (let i = 0; i < 10; i++) { arr.push({ date: date, amount: 20 + 80 * Math.random(), errorPlus: 10 * Math.random(), errorMinus: 10 * Math.random(), }); // date = wijmo.DateTime.addMonths(date, 1); } // return arr; } export function getComboData() { return [ { hdr: 'Bound Error Values', value: null, mode: 'Custom' }, { hdr: '15%', value: .15, mode: 'Percentage' }, { hdr: '5 units', value: 5, mode: 'FixedValue' }, { hdr: '1.5 Std Dev', value: 1.5, mode: 'StandardDeviation' }, { hdr: 'Standard Error', value: 1, mode: 'StandardError' }, { hdr: 'Plus 5, Minus 10', value: { plus: 5, minus: 10 }, mode: 'Custom' } ]; }
(function (global) { System.config({ transpiler: 'plugin-babel', babelOptions: { es2015: true, react: true }, meta: { '*.css': { loader: 'css' } }, paths: { // paths serve as alias 'npm:': 'node_modules/' }, // map tells the System loader where to look for things map: { 'jszip': 'npm:jszip/dist/jszip.js', '@mescius/wijmo': 'npm:@mescius/wijmo/index.js', '@mescius/wijmo.input': 'npm:@mescius/wijmo.input/index.js', '@mescius/wijmo.styles': 'npm:@mescius/wijmo.styles', '@mescius/wijmo.cultures': 'npm:@mescius/wijmo.cultures', '@mescius/wijmo.chart': 'npm:@mescius/wijmo.chart/index.js', '@mescius/wijmo.chart.analytics': 'npm:@mescius/wijmo.chart.analytics/index.js', '@mescius/wijmo.chart.animation': 'npm:@mescius/wijmo.chart.animation/index.js', '@mescius/wijmo.chart.annotation': 'npm:@mescius/wijmo.chart.annotation/index.js', '@mescius/wijmo.chart.finance': 'npm:@mescius/wijmo.chart.finance/index.js', '@mescius/wijmo.chart.finance.analytics': 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"npm:react-use-event-hook/dist/esm/useEvent.js", }, // packages tells the System loader how to load when no filename and/or no extension packages: { src: { defaultExtension: 'jsx' }, "node_modules": { defaultExtension: 'js' }, } }); })(this);