Radar Area Chart

Sep 27, 2023
3 minutes to read

Short Description

The Radar Area Chart is represented by the RadarAreaSeriesView object, which belongs to Radar Series Views. This view is useful when it’s necessary to display series as filled area on a circular grid that has multiple axes along which data can be plotted. Note that although these charts normally have a circular shape, they can also be displayed as a polygon. This is controlled via the RadarDiagram.DrawingStyle property.

A Radar Area chart is shown in the image below.

Chart Type Characteristics

The table below lists the main characteristics of this chart type.

Feature	Value
Series View type	RadarAreaSeriesView
Diagram type	RadarDiagram
Number of arguments per series point	1
Number of values per series point	1

Note

For information on which chart types can be combined with the Radar Area Chart , refer to the Series Views Compatibility document.

Example

The following example demonstrates how to create a ChartControl with a series of the RadarAreaSeriesView type, set its general properties, and add this chart to a form at runtime. Before proceeding with this example, first create a Windows Forms Application in Visual Studio, and include all necessary assemblies to the References list of your project.

Then, add the following code to the Form.Load event handler.

C#
VB.NET

csharp

using System;
using System.Windows.Forms;
using DevExpress.XtraCharts;
// ...

private void Form1_Load(object sender, EventArgs e) {
    // Create a new chart.
    ChartControl RadarAreaChart = new ChartControl();

    // Add a radar series to it.
    Series series1 = new Series("Series 1", ViewType.RadarArea);

    // Populate the series with points.
    series1.Points.Add(new SeriesPoint(0, 90));
    series1.Points.Add(new SeriesPoint(90, 95));
    series1.Points.Add(new SeriesPoint(180, 50));
    series1.Points.Add(new SeriesPoint(270, 55));
    series1.Points.Add(new SeriesPoint(0, 180));
    series1.Points.Add(new SeriesPoint(90, 185));
    series1.Points.Add(new SeriesPoint(180, 270));
    series1.Points.Add(new SeriesPoint(270, 275));

    // Add the series to the chart.
    RadarAreaChart.Series.Add(series1);

    // Flip the diagram (if necessary).
    ((RadarDiagram)RadarAreaChart.Diagram).StartAngleInDegrees = 180;
    ((RadarDiagram)RadarAreaChart.Diagram).RotationDirection =
        RadarDiagramRotationDirection.Counterclockwise;

    // Add a title to the chart and hide the legend.
    ChartTitle chartTitle1 = new ChartTitle();
    chartTitle1.Text = "Radar Area Chart";
    RadarAreaChart.Titles.Add(chartTitle1);
    RadarAreaChart.Legend.Visible = false;

    // Add the chart to the form.
    RadarAreaChart.Dock = DockStyle.Fill;
    this.Controls.Add(RadarAreaChart);
}

Imports System
Imports System.Windows.Forms
Imports DevExpress.XtraCharts
' ...

Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load
    ' Create a new chart.
    Dim RadarAreaChart As New ChartControl()

    ' Add a radar series to it.
    Dim series1 As New Series("Series 1", ViewType.RadarArea)

    ' Populate the series with points.
    series1.Points.Add(New SeriesPoint(0, 90))
    series1.Points.Add(New SeriesPoint(90, 95))
    series1.Points.Add(New SeriesPoint(180, 50))
    series1.Points.Add(New SeriesPoint(270, 55))
    series1.Points.Add(New SeriesPoint(0, 180))
    series1.Points.Add(New SeriesPoint(90, 185))
    series1.Points.Add(New SeriesPoint(180, 270))
    series1.Points.Add(New SeriesPoint(270, 275))

    ' Add the series to the chart.
    RadarAreaChart.Series.Add(series1)

    ' Flip the diagram (if necessary).
    CType(RadarAreaChart.Diagram, RadarDiagram).StartAngleInDegrees = 180
    CType(RadarAreaChart.Diagram, RadarDiagram).RotationDirection = _ 
        RadarDiagramRotationDirection.Counterclockwise

    ' Add a title to the chart and hide the legend.
    Dim chartTitle1 As New ChartTitle()
    chartTitle1.Text = "Radar Area Chart"
    RadarAreaChart.Titles.Add(chartTitle1)
    RadarAreaChart.Legend.Visible = False

    ' Add the chart to the form.
    RadarAreaChart.Dock = DockStyle.Fill
    Me.Controls.Add(RadarAreaChart)
End Sub