Empty points in Angular Accumulation chart component

8 Sep 202511 minutes to read

The data points those uses the null or undefined as value are considered as empty points. The empty data points are ignored and not plotted in the chart. You can customize those points, using the emptyPointSettings property in series. The default mode of the empty point is Gap. Other supported modes are Average and Zero.

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { AccumulationChartModule, ExportService } from '@syncfusion/ej2-angular-charts'
import { PieSeriesService, AccumulationDataLabelService } from '@syncfusion/ej2-angular-charts'



import { Component, OnInit } from '@angular/core';

@Component({
imports: [
         AccumulationChartModule
    ],

providers: [PieSeriesService, AccumulationDataLabelService, ExportService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-accumulationchart id="chart-container">
        <e-accumulation-series-collection>
            <e-accumulation-series [dataSource]='piedata' xName='x' yName='y' radius="100%"
             [emptyPointSettings]='empty'></e-accumulation-series>
        </e-accumulation-series-collection>
    </ejs-accumulationchart>`
})
export class AppComponent implements OnInit {
    public piedata?: Object[];
    public empty?: Object;
    ngOnInit(): void {
        this.piedata = [
            { x: 'Jan', y: 3, text: 'Jan: 3' }, { x: 'Feb', y: 3.5, text: 'Feb: 3.5' },
            { x: 'Mar', y: null, text: 'Mar: 7' }, { x: 'Apr', y: 13.5, text: 'Apr: 13.5' },
            { x: 'May', y: 19, text: 'May: 19' }, { x: 'Jun', y: 23.5, text: 'Jun: 23.5' },
            { x: 'Jul', y: 26, text: 'Jul: 26' }, { x: 'Aug', y: undefined, text: 'Aug: 25' },
            { x: 'Sep', y: 21, text: 'Sep: 21' }, { x: 'Oct', y: 15, text: 'Oct: 15' }
        ];
        this.empty = {
            mode: 'Zero', fill: 'pink', border: { width: 2, color: 'black'}
        }
    }
     

}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));

Customization

Specific color for an empty point can be set by using the fill property in emptyPointSettings and the
border for an empty point can be set by using the border property.

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { AccumulationChartModule, ExportService } from '@syncfusion/ej2-angular-charts'
import { PieSeriesService, AccumulationDataLabelService } from '@syncfusion/ej2-angular-charts'



import { Component, OnInit } from '@angular/core';

@Component({
imports: [
         AccumulationChartModule
    ],

providers: [PieSeriesService, AccumulationDataLabelService, ExportService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-accumulationchart id="chart-container">
        <e-accumulation-series-collection>
            <e-accumulation-series [dataSource]='piedata' xName='x' yName='y' [emptyPointSettings]='empty'></e-accumulation-series>
        </e-accumulation-series-collection>
    </ejs-accumulationchart>`
})
export class AppComponent implements OnInit {
    public piedata?: Object[];
    public empty?: Object;
    ngOnInit(): void {
        this.piedata = [
                { x: 'Jan', y: 3, text: 'Jan: 3' }, { x: 'Feb', y: 3.5, text: 'Feb: 3.5' },
                { x: 'Mar', y: null, text: 'Mar: 7' }, { x: 'Apr', y: 13.5, text: 'Apr: 13.5' },
                { x: 'May', y: 19, text: 'May: 19' }, { x: 'Jun', y: 23.5, text: 'Jun: 23.5' },
                { x: 'Jul', y: 26, text: 'Jul: 26' }, { x: 'Aug', y: undefined, text: 'Aug: 25' },
                { x: 'Sep', y: 21, text: 'Sep: 21' }, { x: 'Oct', y: 15, text: 'Oct: 15' }];
        this.empty = {
            mode: 'Average', fill: 'pink', border: { width: 2, color: 'black'}
        }
    }

}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));

Handling No Data

When no data is available to render in the accumulation chart, the noDataTemplate property can be used to display a custom layout within the chart area. This layout may include a message indicating the absence of data, a relevant image, or a button to initiate data loading. Styled text, images, or interactive elements can be incorporated to maintain design consistency and improve user guidance. Once data becomes available, the chart automatically updates to display the appropriate visualization.

import { NgModule, ViewChild } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { AccumulationChartModule } from '@syncfusion/ej2-angular-charts'
import { PieSeriesService, AccumulationLegendService, AccumulationTooltipService, AccumulationAnnotationService,
  AccumulationDataLabelService, AccumulationChartComponent } from '@syncfusion/ej2-angular-charts'
import { Component, OnInit } from '@angular/core';
import { pieData } from './datasource';
@Component({
imports: [
         AccumulationChartModule
    ],
providers: [PieSeriesService, AccumulationLegendService, AccumulationTooltipService, AccumulationDataLabelService,
     AccumulationAnnotationService],
standalone: true,
    selector: 'app-container',
    template: `<ejs-accumulationchart id="chart-container" [noDataTemplate]='noDataTemplate' [legendSettings]='legendSettings'>
        <e-accumulation-series-collection>
            <e-accumulation-series [dataSource]='piedata' xName='x' yName='y' type='Pie'></e-accumulation-series>
        </e-accumulation-series-collection>
        <ng-template #noDataTemplate>
                <div id="noDataTemplateContainer">
                    <div class="template-align">    
                        <img src="./no-data.png" alt="No Data"/>
                    </div>
                    <div class="template-align">
                        <p style="font-size: 15px; margin: 10px 0 0;"><strong>No data available to display.</strong></p>
                    </div>
                    <div class="template-align" style="margin-top: 15px;">
                        <button ejs-button class="load-data-btn" (click)="loadData()" iconCss="e-icons e-refresh">Load Data</button>
                    </div>
                </div>
            </ng-template>
    </ejs-accumulationchart>`
})
export class AppComponent implements OnInit {
    public piedata?: Object[];
    public legendSettings?: Object;
    ngOnInit(): void {
        this.piedata = [];
        this.legendSettings = {
            visible: false
        };
    }

    public loadData(): void {
        this.piedata = pieData;
    }
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));