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Grouping

You can club/group few points of the series based on groupTo property. For example, if the club value is 11, then the points with value less than 11 is grouped together and will be showed as a single point with label others. The property also takes value in percentage (percentage of total data points value).

Source
Preview
index.tsx
import * as React from "react";
import * as ReactDOM from "react-dom";
import {
  AccumulationChartComponent, AccumulationSeriesCollectionDirective, AccumulationSeriesDirective,
   Inject, AccumulationDataLabel,AccumulationDataLabelSettingsModel,
  IAccTextRenderEventArgs, IAccPointRenderEventArgs
  }
from'@syncfusion/ej2-react-charts';
import { accData } from 'datasource.ts';

class App extends React.Component<{}, {}> {

  public datalabel: AccumulationDataLabelSettingsModel = { visible: true, name: 'text', position: 'Outside' };

  render() {
    return <AccumulationChartComponent id='charts' >
      <Inject services={[AccumulationDataLabel]} />
      <AccumulationSeriesCollectionDirective>
        <AccumulationSeriesDirective dataSource={accData} xName='x' yName='y' groupTo='11'
          dataLabel={this.datalabel}></AccumulationSeriesDirective>
      </AccumulationSeriesCollectionDirective>
    </AccumulationChartComponent>
  }

};
ReactDOM.render(<App />, document.getElementById("charts"));

Broken slice

You can visualize all points available in club/group points by clicking on the grouped point. For example, if 5 points are grouped together it will be showed as a single slice with label others. If we click on others slice it will explode and broke into 5 seperate slices.

Source
Preview
index.tsx
import * as React from "react";
import * as ReactDOM from "react-dom";
import {
  AccumulationChartComponent, AccumulationSeriesCollectionDirective, AccumulationSeriesDirective,
   Inject, AccumulationDataLabel,AccumulationDataLabelSettingsModel,
  IAccTextRenderEventArgs, IAccPointRenderEventArgs
  }
from'@syncfusion/ej2-react-charts';

class App extends React.Component<{}, {}> {
  public dataSource:any[] = [
                    { x: 'Jan', y: 3, text: 'Jan: 3' }, { x: 'Feb', y: 3.5, text: 'Feb: 3.5' },
                    { x: 'Mar', y: 7, 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: 25, text: 'Aug: 25' },
                    { x: 'Sep', y: 21, text: 'Sep: 21' }, { x: 'Oct', y: 15, text: 'Oct: 15' },
                    { x: 'Nov', y: 9, text: 'Nov: 9' }, { x: 'Dec', y: 3.5, text: 'Dec: 3.5' }
                ];
  public datalabel: AccumulationDataLabelSettingsModel = { visible: true, name: 'text', position: 'Outside' };

  render() {
    return <AccumulationChartComponent id='charts' >
      <Inject services={[AccumulationDataLabel]} />
      <AccumulationSeriesCollectionDirective>
        <AccumulationSeriesDirective dataSource={this.dataSource} xName='x' yName='y' groupTo='11' explode={true} explodeOffset='10'
          dataLabel={this.datalabel}></AccumulationSeriesDirective>
      </AccumulationSeriesCollectionDirective>
    </AccumulationChartComponent>
  }

};
ReactDOM.render(<App />, document.getElementById("charts"));

GroupMode

Slice can also be grouped based on number of points by specifying the groupMode to Point. For example, if the group to value is 11, accumulation chart will show 1st 11 points and will group remaining entries in the collection as a single point.

Source
Preview
index.tsx
import * as React from "react";
import * as ReactDOM from "react-dom";
import {
  AccumulationChartComponent, AccumulationSeriesCollectionDirective, AccumulationSeriesDirective, Inject, AccumulationDataLabel,
  IAccTextRenderEventArgs, IAccPointRenderEventArgs,AccumulationDataLabelSettingsModel
  }
from'@syncfusion/ej2-react-charts';
import { accData } from 'datasource.ts';

class App extends React.Component<{}, {}> {

  public datalabel: AccumulationDataLabelSettingsModel = { visible: true, name: 'text', position: 'Outside' };

  render() {
    return <AccumulationChartComponent id='charts'>
      <Inject services={[AccumulationDataLabel]} />
      <AccumulationSeriesCollectionDirective>
        <AccumulationSeriesDirective dataSource={accData} xName='x' yName='y' groupTo='4' groupMode='Point'
          dataLabel={this.datalabel}></AccumulationSeriesDirective>
      </AccumulationSeriesCollectionDirective>
    </AccumulationChartComponent>
  }

};
ReactDOM.render(<App />, document.getElementById("charts"));

Customization

You can customize the grouped point and its data label using pointRender and textRender event.

Source
Preview
index.tsx
import * as React from "react";
import * as ReactDOM from "react-dom";
import {
  AccumulationChartComponent, AccumulationSeriesCollectionDirective, AccumulationSeriesDirective, Inject, AccumulationDataLabel,
  IAccTextRenderEventArgs, IAccPointRenderEventArgs,AccumulationDataLabelSettingsModel
  }
from'@syncfusion/ej2-react-charts';
import { accData } from 'datasource.ts';

class App extends React.Component<{}, {}> {

  public onTextRender: EmitType<IAccTextRenderEventArgs> = (args: IAccTextRenderEventArgs): void => {
    if (args.text.indexOf('Others') > -1) {
      args.color = 'red';
      args.border.width = 1;
    }
  };
  public onPointRender: EmitType<IAccPointRenderEventArgs> = (args: IAccPointRenderEventArgs): void => {
    if ((args.point.x as string).indexOf('Others') > -1) {
      args.fill = '#D3D3D3';
    }
  };
  public datalabel: AccumulationDataLabelSettingsModel = { visible: true, name: 'text', position: 'Outside' };

  render() {
    return <AccumulationChartComponent id='charts' textRender={this.onTextRender} pointRender={this.onPointRender}>
      <Inject services={[AccumulationDataLabel]} />
      <AccumulationSeriesCollectionDirective>
        <AccumulationSeriesDirective dataSource={accData} xName='x' yName='y' groupTo='11'
          dataLabel={this.datalabel}></AccumulationSeriesDirective>
      </AccumulationSeriesCollectionDirective>
    </AccumulationChartComponent>
  }

};
ReactDOM.render(<App />, document.getElementById("charts"));