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Charts

Pareto Chart

In this demo, the DevExtreme Chart component is used to create a Pareto chart. This example of a Pareto chart summarizes complaints about the service provided by a pizza shop. From this chart, the pizza shop owner may infer that to satisfy most of the customers, he or she needs to eliminate two most frequently encountered issues: delayed delivery and cold pizza.

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const DemoApp = angular.module('DemoApp', ['dx']); DemoApp.controller('DemoController', ($scope) => { const data = complaintsData.sort((a, b) => b.count - a.count); const totalCount = data.reduce((prevValue, item) => prevValue + item.count, 0); let cumulativeCount = 0; const dataSource = data.map((item) => { cumulativeCount += item.count; return { complaint: item.complaint, count: item.count, cumulativePercentage: Math.round((cumulativeCount * 100) / totalCount), }; }); $scope.chartOptions = { palette: 'Harmony Light', dataSource, title: 'Pizza Shop Complaints', argumentAxis: { label: { overlappingBehavior: 'stagger', }, }, tooltip: { enabled: true, shared: true, customizeTooltip(info) { const tmpContainer = document.createElement('div'); tmpContainer.innerHTML = ["<div><div class='tooltip-header'></div>", "<div class='tooltip-body'><div class='series-name'>", "<span class='top-series-name'></span>", ": </div><div class='value-text'>", "<span class='top-series-value'></span>", "</div><div class='series-name'>", "<span class='bottom-series-name'></span>", ": </div><div class='value-text'>", "<span class='bottom-series-value'></span>", '% </div></div></div>'].join(''); tmpContainer.querySelector('.tooltip-header').textContent = info.argumentText; tmpContainer.querySelector('.top-series-name').textContent = info.points[0].seriesName; tmpContainer.querySelector('.top-series-value').textContent = info.points[0].valueText; tmpContainer.querySelector('.bottom-series-name').textContent = info.points[1].seriesName; tmpContainer.querySelector('.bottom-series-value').textContent = info.points[1].valueText; return { html: tmpContainer.innerHTML, }; }, }, valueAxis: [{ name: 'frequency', position: 'left', tickInterval: 300, }, { name: 'percentage', position: 'right', showZero: true, label: { customizeText(info) { return `${info.valueText}%`; }, }, constantLines: [{ value: 80, color: '#fc3535', dashStyle: 'dash', width: 2, label: { visible: false }, }], tickInterval: 20, valueMarginsEnabled: false, }], commonSeriesSettings: { argumentField: 'complaint', }, series: [{ type: 'bar', valueField: 'count', axis: 'frequency', name: 'Complaint frequency', color: '#fac29a', }, { type: 'spline', valueField: 'cumulativePercentage', axis: 'percentage', name: 'Cumulative percentage', color: '#6b71c3', }], legend: { verticalAlignment: 'top', horizontalAlignment: 'center', }, }; });
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <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" /> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> <script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.2.3/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.2.3/css/dx.light.css" /> <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.8.2/angular.min.js"></script> <script>window.angular || document.write(decodeURIComponent('%3Cscript src="js/angular.min.js"%3E%3C/script%3E'))</script> <script src="https://cdn3.devexpress.com/jslib/21.2.3/js/dx.all.js"></script> <script src="data.js"></script> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="index.js"></script> </head> <body class="dx-viewport"> <div class="demo-container" ng-app="DemoApp" ng-controller="DemoController"> <div id="chart-demo"> <div id="chart" dx-chart="chartOptions"></div> </div> </div> </body> </html>
#chart { height: 440px; } .tooltip-header { margin-bottom: 5px; font-size: 16px; font-weight: 500; padding-bottom: 5px; border-bottom: 1px solid #c5c5c5; } .tooltip-body { width: 170px; } .tooltip-body .series-name { font-weight: normal; opacity: 0.6; display: inline-block; line-height: 1.5; padding-right: 10px; width: 126px; } .tooltip-body .value-text { display: inline-block; line-height: 1.5; width: 30px; }
const complaintsData = [ { complaint: 'Cold pizza', count: 780 }, { complaint: 'Not enough cheese', count: 120 }, { complaint: 'Underbaked or Overbaked', count: 52 }, { complaint: 'Delayed delivery', count: 1123 }, { complaint: 'Damaged pizza', count: 321 }, { complaint: 'Incorrect billing', count: 89 }, { complaint: 'Wrong size delivered', count: 222 }, ];