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Error Bars
Documentation
If your data contains an error or measurement uncertainty, you can indicate a confidential interval on the Chart using error bars. To configure them, use the fields of the series’ valueErrorBar object. In this example, error bars indicate a range of average temperatures (on the upper pane) and humidity (on the lower pane) for a specific month.
www.weatherbase.com
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<dx-chart
id="chart"
defaultPane="bottom"
[dataSource]="weatherData"
title="Weather in Los Angeles, California">
<dxi-series
pane="top"
valueField="avgT"
name="Average Temperature, °C">
<dxo-value-error-bar
lowValueField="avgLowT"
highValueField="avgHighT"
[lineWidth]="1"
[opacity]="0.8">
</dxo-value-error-bar>
</dxi-series>
<dxi-series
pane="bottom"
valueField="avgH"
type="bar"
name="Average Humidity, %">
<dxo-value-error-bar
type="fixed"
[value]="3"
[lineWidth]="1">
</dxo-value-error-bar>
</dxi-series>
<dxo-common-series-settings argumentField="month"></dxo-common-series-settings>
<dxi-pane name="top"></dxi-pane>
<dxi-pane name="bottom"></dxi-pane>
<dxo-argument-axis>
<dxo-label displayMode="stagger"></dxo-label>
</dxo-argument-axis>
<dxo-export [enabled]="true"></dxo-export>
<dxi-value-axis pane="top">
<dxo-grid [visible]="true"></dxo-grid>
<dxo-title text="Temperature, °C"></dxo-title>
</dxi-value-axis>
<dxi-value-axis
[tickInterval]="50"
pane="bottom">
<dxo-grid [visible]="true"></dxo-grid>
<dxo-title text="Humidity, %"></dxo-title>
</dxi-value-axis>
<dxo-tooltip
[enabled]="true"
[customizeTooltip]="customizeTooltip"></dxo-tooltip>
<dxo-legend
verticalAlignment="bottom"
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, Weather} 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 {
weatherData: Weather[];
constructor(service: Service) {
this.weatherData = service.getWeatherData();
}
customizeTooltip(arg: any) {
return {
text: arg.seriesName + ": " + arg.value + " ( range: " + arg.lowErrorValue + " - " + arg.highErrorValue + ")"
};
}
}
@NgModule({
imports: [
BrowserModule,
DxChartModule
],
declarations: [AppComponent],
bootstrap: [AppComponent]
})
export class AppModule { }
platformBrowserDynamic().bootstrapModule(AppModule);
::ng-deep #chart {
height: 440px;
}
import { Injectable } from '@angular/core';
export class Weather {
month: string;
avgT: number;
avgLowT: number;
avgHighT: number;
avgH: number;
}
let weatherData: Weather[] = [{
month: "January",
avgT: 14.1,
avgLowT: 9.1,
avgHighT: 19.1,
avgH: 70
}, {
month: "February",
avgT: 14.7,
avgLowT: 9.8,
avgHighT: 19.6,
avgH: 74
}, {
month: "March",
avgT: 15.6,
avgLowT: 10.6,
avgHighT: 20.4,
avgH: 79
}, {
month: "April",
avgT: 16.8,
avgLowT: 11.9,
avgHighT: 21.7,
avgH: 80
}, {
month: "May",
avgT: 18.2,
avgLowT: 13.6,
avgHighT: 22.7,
avgH: 83
}, {
month: "June",
avgT: 20.2,
avgLowT: 15.4,
avgHighT: 25,
avgH: 85
}, {
month: "July",
avgT: 22.6,
avgLowT: 17.3,
avgHighT: 27.9,
avgH: 86
}, {
month: "August",
avgT: 23,
avgLowT: 17.7,
avgHighT: 28.4,
avgH: 86
}, {
month: "September",
avgT: 22.3,
avgLowT: 17,
avgHighT: 27.7,
avgH: 83
}, {
month: "October",
avgT: 20.1,
avgLowT: 14.8,
avgHighT: 25.3,
avgH: 79
}, {
month: "November",
avgT: 17.2,
avgLowT: 11.8,
avgHighT: 22.7,
avgH: 72
}, {
month: "December",
avgT: 14.6,
avgLowT: 9.5,
avgHighT: 19.7,
avgH: 68
}];
@Injectable()
export class Service {
getWeatherData(): Weather[] {
return weatherData;
}
}
// 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@20.2.4',
'jszip': 'npm:jszip@3.5.0/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@0.9.7/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.0.5',
'devexpress-gantt': 'npm:devexpress-gantt@2.0.8',
'devextreme-angular': 'npm:devextreme-angular@20.2.4',
'preact': 'npm:preact@10.5.7/dist/preact.js',
'preact/hooks': 'npm:preact@10.5.7/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/20.2.4/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.4/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>