Stacked Spline Chart

The Ignite UI for Angular stacked spline chart belongs to a group of category charts and is rendered using a collection of points connected by smooth curves of spline segments (IgxStackedFragmentSeriesComponent) that are stacked on top of each other. Each stacked fragment in the collection represents one visual element in each stack. Each stack can contain both positive and negative values. All positive values are grouped on the positive side of the y-axis, and all negative values are grouped on the negative side of the y-axis.

Demo

View on StackBlitz

The IgxStackedSplineSeriesComponent has its own IgxSeriesComponent collection in which you can place the IgxStackedFragmentSeriesComponent elements. These fragments are what make up the actual rendering of the chart and are the elements that accept the valueMemberPath.

Required Axes

The Angular data chart component provides various types of axes but only the following types of axes can be used with IgxStackedSplineSeriesComponent.

• IgxCategoryXAxisComponent
• IgxOrdinalTimeXAxisComponent
• IgxTimeXAxisComponent
• IgxNumericYAxisComponent

Required Data

The IgxStackedSplineSeriesComponent has the following data requirements:

• The data source must be an array or a list of data items.
• The data source must contain at least one data item otherwise the chart will not render the IgxStackedSplineSeriesComponent.
• All data items must contain at least one data column (string or date time) which should be mapped to the Label property of the category axis (e.g. IgxCategoryXAxisComponent).
• All data items must contain at least one numeric data column which should be mapped using the ValueMemberPath property of the IgxStackedFragmentSeriesComponent to be added to the IgxStackedSplineSeriesComponent' IgxSeriesComponent collection.

Required Modules

Creation of the IgxStackedSplineSeriesComponent requires the following modules:

// axis' modules:
import { IgxNumericXAxis } from "igniteui-angular-charts/ES5/igx-numeric-x-axis";
import { IgxCategoryYAxis } from "igniteui-angular-charts/ES5/igx-category-y-axis";
// series' modules:
import { IgxStackedSplineSeries } from "igniteui-angular-charts/ES5/igx-stacked-spline-series";
// data chart's modules:

import { IgxDataChartCoreModule } from "igniteui-angular-charts/ES5/igx-data-chart-core--module";
import { IgxDataChartCategoryModule } from "igniteui-angular-charts/ES5/igx-data-chart-category--module";
import { IgxDataChartStackedModule } from "igniteui-angular-charts/ES5/igx-data-chart-stacked-module";

@NgModule({
    imports: [
        // ...
        IgxDataChartCoreModule,
        IgxDataChartCategoryModule,
        IgxDataChartStackedModule
        // ...
    ]
})

Code Example - Stacked Spline Chart

This code demonstrates how to create an instance of the Ignite UI for Angular data chart with IgxStackedSplineSeriesComponent and bind it to a data source.

<igx-data-chart #chart height="100%" width="100%" [dataSource]="data">
  <igx-category-x-axis #xAxis label="Country"></igx-category-x-axis>
  <igx-numeric-y-axis #yAxis></igx-numeric-y-axis>

  <igx-stacked-spline-series [xAxis]="xAxis" [yAxis]="yAxis">
    <igx-stacked-fragment-series valueMemberPath="Coal"></igx-stacked-fragment-series>
    <igx-stacked-fragment-series valueMemberPath="Hydro"></igx-stacked-fragment-series>
    <igx-stacked-fragment-series valueMemberPath="Nuclear"></igx-stacked-fragment-series>
    <igx-stacked-fragment-series valueMemberPath="Gas"></igx-stacked-fragment-series>
    <igx-stacked-fragment-series valueMemberPath="Oil"></igx-stacked-fragment-series>
  </igx-stacked-spline-series>

</igx-data-chart>