Error Bars

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

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; // import { isArray } from '@grapecity/wijmo'; import { FlexChart, Palettes } from '@grapecity/wijmo.chart'; import { ErrorBar } from '@grapecity/wijmo.chart.analytics'; import { ComboBox } from '@grapecity/wijmo.input'; import { getData, getComboData } from './data'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // create the chart let theChart = new FlexChart('#theChart', { itemsSource: getData(), bindingX: 'date', axisX: { format: 'MMM yy' }, palette: getRandomPalette() }); // // create an ErrorBar series and add it to the Chart let errorBar = new ErrorBar({ errorBarStyle: { stroke: 'darkred', strokeWidth: 3 } }); theChart.series.push(errorBar); // // select chart type let chartType = new ComboBox('#chartType', { itemsSource: ['Column', 'Bar', 'Scatter', 'Line', 'LineSymbols', 'Area', 'Spline', 'SplineSymbols', 'SplineArea'], textChanged: (s) => { theChart.chartType = s.text; } }); // // select error mode/amount let errorAmount = new ComboBox('#errorAmount', { displayMemberPath: 'hdr', textChanged: (sender) => { let value = sender.selectedItem.value; errorBar.value = value; errorBar.binding = value != null ? 'amount' : 'amount,errorPlus,errorMinus'; errorBar.errorAmount = sender.selectedItem.mode; }, itemsSource: getComboData() }); // // randomize the data document.querySelector('#btnRandomize').addEventListener('click', () => { theChart.itemsSource = getData(); }); } // function getRandomPalette() { let palettes = Object.keys(Palettes).filter(prop => isArray(Palettes[prop])); let rand = Math.floor(Math.random() * palettes.length); // return Palettes[palettes[rand]]; }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo FlexChart ErrorBar</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="node_modules/systemjs/dist/system.src.js"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div class="container-fluid"> <div class="form-group"> <label for="chartType">Chart Type: </label> <div id="chartType"></div> </div> <div class="form-group"> <label for="errorAmount">Error: </label> <div id="errorAmount"></div> </div> <div class="form-group"> <label for="btnRandomize">Randomize Data</label> <button id="btnRandomize" class="btn btn-default"> Go </button> </div> <div id="theChart"></div> </div> </body> </html>
import * as wijmo from '@grapecity/wijmo'; // // generate some random data 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' } ]; }
.wj-flexchart { height: 250px; margin: 10px 0; } label { width: 150px; text-align: right; } body { margin-bottom: 24pt; }
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