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Area Charts

Step Area with Gaps

Documentation

This demo illustrates how the Chart widget treats points with null value.

www.nytimes.com
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<dx-chart id="chart" [dataSource]="medalsInfo" title="France Olympic Medals"> <dxi-series valueField="gold" name="Gold Medals" color="#ffd700"></dxi-series> <dxi-series valueField="silver" name="Silver Medals" color="#c0c0c0"></dxi-series> <dxo-common-series-settings argumentField="year" type="steparea"> <dxo-steparea> <dxo-point [visible]="true"></dxo-point> </dxo-steparea> </dxo-common-series-settings> <dxo-argument-axis> <dxo-label> <dxo-format type="decimal"></dxo-format> </dxo-label> </dxo-argument-axis> <dxo-legend verticalAlignment="bottom" horizontalAlignment="center"> </dxo-legend> <dxo-export [enabled]="true"></dxo-export> </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, MedalsInfo } 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 { medalsInfo: MedalsInfo[]; constructor(service: Service) { this.medalsInfo = service.getMedalsInfo(); } } @NgModule({ imports: [ BrowserModule, DxChartModule ], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
/deep/ #chart { height: 440px; width: 100%; }
import { Injectable } from '@angular/core'; export class MedalsInfo { year: number; gold: number; silver: number; } let medalsInfo: MedalsInfo[] = [{ year: 1904, gold: null, silver: null }, { year: 1908, gold: 5, silver: 5 }, { year: 1912, gold: 7, silver: 4 }, { year: 1916, gold: null, silver: null }, { year: 1920, gold: 9, silver: 19 }, { year: 1924, gold: 13, silver: 15 }, { year: 1928, gold: 6, silver: 10 }, { year: 1932, gold: 10, silver: 5 }, { year: 1936, gold: 7, silver: 6 }, { year: 1940, gold: null, silver: null }, { year: 1944, gold: null, silver: null }, { year: 1948, gold: 10, silver: 6 }, { year: 1952, gold: 6, silver: 6 }, { year: 1956, gold: 4, silver: 4 }, { year: 1960, gold: null, silver: 2 }, { year: 1964, gold: 1, silver: 8 }, { year: 1968, gold: 7, silver: 3 }, { year: 1972, gold: 2, silver: 4 }, { year: 1976, gold: 2, silver: 3 }, { year: 1980, gold: 6, silver: 5 }, { year: 1984, gold: 5, silver: 7 }, { year: 1988, gold: 6, silver: 4 }, { year: 1992, gold: 8, silver: 5 }, { year: 1996, gold: 15, silver: 7 }, { year: 2000, gold: 13, silver: 14 }, { year: 2004, gold: 11, silver: 9 }, { year: 2008, gold: 7, silver: 16 }]; @Injectable() export class Service { getMedalsInfo(): MedalsInfo[] { return medalsInfo; } }
// 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://github.com/DevExpress/devextreme-angular/blob/master/README.md System.config({ transpiler: 'ts', typescriptOptions: { module: "commonjs", emitDecoratorMetadata: true, experimentalDecorators: true }, meta: { 'typescript': { "exports": "ts" } }, paths: { 'npm:': 'https://unpkg.com/' }, map: { 'ts': 'npm:plugin-typescript@7.0.6/lib/plugin.js', 'typescript': 'npm:typescript@2.2.2/lib/typescript.js', '@angular/core': 'npm:@angular/core@4.1.0/bundles/core.umd.js', '@angular/common': 'npm:@angular/common@4.1.0/bundles/common.umd.js', '@angular/compiler': 'npm:@angular/compiler@4.1.0/bundles/compiler.umd.js', '@angular/platform-browser': 'npm:@angular/platform-browser@4.1.0/bundles/platform-browser.umd.js', '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@4.1.0/bundles/platform-browser-dynamic.umd.js', '@angular/http': 'npm:@angular/http@4.1.0/bundles/http.umd.js', '@angular/router': 'npm:@angular/router@4.1.0/bundles/router.umd.js', '@angular/forms': 'npm:@angular/forms@4.1.0/bundles/forms.umd.js', 'rxjs': 'npm:rxjs@5.3.1', 'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js', 'devextreme': 'npm:devextreme@17.2', 'jquery': 'npm:jquery@3.1.1/dist/jquery.min.js', 'devextreme-angular': 'npm:devextreme-angular@17.2' }, packages: { 'app': { main: './app.component.ts', defaultExtension: 'ts' }, 'devextreme': { defaultExtension: 'js' }, 'devextreme-angular': { main: 'index.js', defaultExtension: 'js' } } });
<!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/17.2.3/css/dx.spa.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/17.2.3/css/dx.common.css" /> <link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/17.2.3/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@0.6.25/dist/zone.js"></script> <script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script> <script src="https://unpkg.com/systemjs@0.19.31/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>