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Charts

Pareto Chart

In this demo, the DevExtreme Chart widget 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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<dx-chart id="chart" [dataSource]="dataSource" title="Pizza Shop Complaints" palette="Harmony Light" [valueAxis]="[{ name: 'frequency', position: 'left', tickInterval: 300 }, { name: 'percentage', position: 'right', showZero: true, label: { customizeText: customizeLabelText }, constantLines: [{ value: 80, color: '#fc3535', dashStyle: 'dash', width: 2, label: { visible: false } }], tickInterval: 20, valueMarginsEnabled: false }]"> <dxo-argument-axis> <dxo-label overlappingBehavior="stagger"></dxo-label> </dxo-argument-axis> <dxo-tooltip [enabled]="true" [shared]="true" [customizeTooltip]="customizeTooltip"> </dxo-tooltip> <dxo-common-series-settings argumentField="complaint"> </dxo-common-series-settings> <dxi-series type="bar" valueField="count" axis="frequency" name="Complaint frequency" color="#fac29a"> </dxi-series> <dxi-series type="spline" valueField="cumulativePercent" axis="percentage" name="Cumulative percentage" color="#6b71c3"> </dxi-series> <dxo-legend verticalAlignment="top" horizontalAlignment="center"> </dxo-legend> </dx-chart>
import { NgModule, Component, enableProdMode } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { DxChartModule } from 'devextreme-angular'; import { Service, ComplaintsWithPercent } from './app.service'; if(!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ selector: 'demo-app', providers: [Service], templateUrl: 'app/app.component.html', styleUrls: ['app/app.component.css'] }) export class AppComponent { dataSource: ComplaintsWithPercent[]; constructor(service: Service) { this.dataSource = service.getComplaintsData() } customizeTooltip = (info: any) => { return { html: "<div><div class='tooltip-header'>" + info.argumentText + "</div>" + "<div class='tooltip-body'><div class='series-name'>" + info.points[0].seriesName + ": </div><div class='value-text'>" + info.points[0].valueText + "</div><div class='series-name'>" + info.points[1].seriesName + ": </div><div class='value-text'>" + info.points[1].valueText + "% </div></div></div>" }; } customizeLabelText = (info: any) => { return info.valueText + "%"; } } @NgModule({ imports: [ BrowserModule, DxChartModule ], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
::ng-deep #chart { height: 440px; } ::ng-deep .tooltip-header { margin-bottom: 5px; font-size: 16px; font-weight: 500; padding-bottom: 5px; border-bottom: 1px solid #c5c5c5; } ::ng-deep .tooltip-body { width: 170px; } ::ng-deep .tooltip-body .series-name { font-weight: normal; opacity: 0.6; display: inline-block; line-height: 1.5; padding-right: 10px; width: 126px; } ::ng-deep .tooltip-body .value-text { display: inline-block; line-height: 1.5; width: 30px; }
import { Injectable } from '@angular/core'; class Complaints { complaint: string; count: number } export class ComplaintsWithPercent { complaint: string; count: number; cumulativePercent: number; } let complaintsData: Complaints[] = [ { 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 } ]; @Injectable() export class Service { getComplaintsData(): ComplaintsWithPercent[] { var data = complaintsData.sort(function (a, b) { return b.count - a.count; }), totalCount = data.reduce(function (prevValue, item) { return prevValue + item.count; }, 0), cumulativeCount = 0; return data.map(function (item, index) { cumulativeCount += item.count; return { complaint: item.complaint, count: item.count, cumulativePercent: Math.round(cumulativeCount * 100 / totalCount) }; }); } }
// In real applications, you should not transpile code in the browser. You can see how to create your own application with Angular and DevExtreme here: // https://js.devexpress.com/Documentation/Guide/Angular_Components/Getting_Started/Create_a_DevExtreme_Application/ System.config({ transpiler: 'ts', typescriptOptions: { module: "system", emitDecoratorMetadata: true, experimentalDecorators: true }, meta: { 'typescript': { "exports": "ts" }, 'devextreme/localization.js': { "esModule": true } }, paths: { 'npm:': 'https://unpkg.com/' }, map: { 'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js', 'typescript': 'npm:typescript@3.5.3/lib/typescript.js', '@angular': 'npm:@angular', 'tslib': 'npm:tslib@2.0.3/tslib.js', 'rxjs': 'npm:rxjs@6.3.3', 'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.25.0/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@20.2.3', 'jszip': 'npm:jszip@3.5.0/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@0.9.5/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.0.0', 'devexpress-gantt': 'npm:devexpress-gantt@2.0.0', 'devextreme-angular': 'npm:devextreme-angular@20.2.3', 'preact': 'npm:preact@10.5.5/dist/preact.js', 'preact/hooks': 'npm:preact@10.5.5/hooks/dist/hooks.js' }, packages: { 'app': { main: './app.component.ts', defaultExtension: 'ts' }, 'devextreme': { defaultExtension: 'js' }, 'devextreme/events/utils': { main: 'index' }, 'devextreme/events': { main: 'index' }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js' } }, packageConfigPaths: [ "npm:@angular/*/package.json", "npm:@angular/common/*/package.json", "npm:rxjs/package.json", "npm:rxjs/operators/package.json", "npm:devextreme-angular/*/package.json", "npm:devextreme-angular/ui/*/package.json", "npm:devextreme-angular/package.json", "npm:devexpress-diagram/package.json", "npm:devexpress-gantt/package.json", ] });
<!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" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.3/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.3/css/dx.light.css" /> <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script> <script src="https://unpkg.com/zone.js@0.10.2/dist/zone.js"></script> <script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script> <script src="config.js"></script> <script> System.import('app').catch(console.error.bind(console)); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <demo-app>Loading...</demo-app> </div> </body> </html>