ChartDirector 6.2 (.NET Edition)

Polar Vector Chart




This example demonstrates a polar vector chart.

A vector chart is like a scatter chart, but the symbols are arrows which can be of arbitrary lengths pointing to arbitrary directions. Thus each symbol in a vector chart is specified by 4 values - the radial and angular coordinates, and the length and the direction.

In ChartDirector, a polar vector layer is created using PolarChart.addVectorLayer.

Source Code Listing

[Windows Forms - C# version] NetWinCharts\CSharpWinCharts\polarvector.cs
using System;
using ChartDirector;

namespace CSharpChartExplorer
{
    public class polarvector : DemoModule
    {
        //Name of demo module
        public string getName() { return "Polar Vector Chart"; }

        //Number of charts produced in this demo module
        public int getNoOfCharts() { return 1; }

        //Main code for creating chart.
        //Note: the argument chartIndex is unused because this demo only has 1 chart.
        public void createChart(WinChartViewer viewer, int chartIndex)
        {
            // Coordinates of the starting points of the vectors
            double[] radius = {5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 10, 10, 10, 10, 10, 10, 10, 10,
                10, 10, 10, 10, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 20, 20, 20, 20, 20,
                20, 20, 20, 20, 20, 20, 20, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25};
            double[] angle = {0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90,
                120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120, 150, 180, 210, 240, 270,
                300, 330, 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120,
                150, 180, 210, 240, 270, 300, 330};

            // Magnitude and direction of the vectors
            double[] magnitude = {5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
                4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1,
                1, 1, 1, 1, 1, 1, 1, 1, 1, 1};
            double[] direction = {60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90,
                120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120, 150, 180, 210, 240, 270,
                300, 330, 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120,
                150, 180, 210, 240, 270, 300, 330, 0, 30};

            // Create a PolarChart object of size 460 x 460 pixels
            PolarChart c = new PolarChart(460, 460);

            // Add a title to the chart at the top left corner using 15pt Arial Bold Italic font
            c.addTitle("Polar Vector Chart Demonstration", "Arial Bold Italic", 15);

            // Set center of plot area at (230, 240) with radius 180 pixels
            c.setPlotArea(230, 240, 180);

            // Set the grid style to circular grid
            c.setGridStyle(false);

            // Set angular axis as 0 - 360, with a spoke every 30 units
            c.angularAxis().setLinearScale(0, 360, 30);

            // Add a polar vector layer to the chart with blue (0000ff) vectors
            c.addVectorLayer(radius, angle, magnitude, direction, Chart.RadialAxisScale, 0x0000ff);

            // Output the chart
            viewer.Chart = c;

            //include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("clickable", "",
                "title='Vector at ({value}, {angle} deg): Length = {len}, Angle = {dir} deg'");
        }
    }
}

[Windows Forms - VB Version] NetWinCharts\VBNetWinCharts\polarvector.vb
Imports System
Imports Microsoft.VisualBasic
Imports ChartDirector

Public Class polarvector
    Implements DemoModule

    'Name of demo module
    Public Function getName() As String Implements DemoModule.getName
        Return "Polar Vector Chart"
    End Function

    'Number of charts produced in this demo module
    Public Function getNoOfCharts() As Integer Implements DemoModule.getNoOfCharts
        Return 1
    End Function

    'Main code for creating chart.
    'Note: the argument chartIndex is unused because this demo only has 1 chart.
    Public Sub createChart(viewer As WinChartViewer, chartIndex As Integer) _
        Implements DemoModule.createChart

        ' Coordinates of the starting points of the vectors
        Dim radius() As Double = {5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 10, 10, 10, 10, 10, 10, 10, _
            10, 10, 10, 10, 10, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 20, 20, 20, 20, _
            20, 20, 20, 20, 20, 20, 20, 20, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25}
        Dim angle() As Double = {0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, _
            90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120, 150, 180, 210, 240, _
            270, 300, 330, 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, _
            120, 150, 180, 210, 240, 270, 300, 330}

        ' Magnitude and direction of the vectors
        Dim magnitude() As Double = {5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, _
            4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, _
            1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}
        Dim direction() As Double = {60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, _
            90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120, 150, 180, 210, 240, _
            270, 300, 330, 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, _
            120, 150, 180, 210, 240, 270, 300, 330, 0, 30}

        ' Create a PolarChart object of size 460 x 460 pixels
        Dim c As PolarChart = New PolarChart(460, 460)

        ' Add a title to the chart at the top left corner using 15pt Arial Bold Italic font
        c.addTitle("Polar Vector Chart Demonstration", "Arial Bold Italic", 15)

        ' Set center of plot area at (230, 240) with radius 180 pixels
        c.setPlotArea(230, 240, 180)

        ' Set the grid style to circular grid
        c.setGridStyle(False)

        ' Set angular axis as 0 - 360, with a spoke every 30 units
        c.angularAxis().setLinearScale(0, 360, 30)

        ' Add a polar vector layer to the chart with blue (0000ff) vectors
        c.addVectorLayer(radius, angle, magnitude, direction, Chart.RadialAxisScale, &H0000ff)

        ' Output the chart
        viewer.Chart = c

        'include tool tip for the chart
        viewer.ImageMap = c.getHTMLImageMap("clickable", "", _
            "title='Vector at ({value}, {angle} deg): Length = {len}, Angle = {dir} deg'")

    End Sub

End Class

[WPF - C#] NetWPFCharts\polarvector.cs
using System;
using ChartDirector;

namespace CSharpWPFDemo
{
    public class polarvector : DemoModule
    {
        //Name of demo module
        public string getName() { return "Polar Vector Chart"; }

        //Number of charts produced in this demo module
        public int getNoOfCharts() { return 1; }

        //Main code for creating chart.
        //Note: the argument chartIndex is unused because this demo only has 1 chart.
        public void createChart(WPFChartViewer viewer, int chartIndex)
        {
            // Coordinates of the starting points of the vectors
            double[] radius = {5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 10, 10, 10, 10, 10, 10, 10, 10,
                10, 10, 10, 10, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 20, 20, 20, 20, 20,
                20, 20, 20, 20, 20, 20, 20, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25};
            double[] angle = {0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90,
                120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120, 150, 180, 210, 240, 270,
                300, 330, 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120,
                150, 180, 210, 240, 270, 300, 330};

            // Magnitude and direction of the vectors
            double[] magnitude = {5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
                4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1,
                1, 1, 1, 1, 1, 1, 1, 1, 1, 1};
            double[] direction = {60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90,
                120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120, 150, 180, 210, 240, 270,
                300, 330, 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120,
                150, 180, 210, 240, 270, 300, 330, 0, 30};

            // Create a PolarChart object of size 460 x 460 pixels
            PolarChart c = new PolarChart(460, 460);

            // Add a title to the chart at the top left corner using 15pt Arial Bold Italic font
            c.addTitle("Polar Vector Chart Demonstration", "Arial Bold Italic", 15);

            // Set center of plot area at (230, 240) with radius 180 pixels
            c.setPlotArea(230, 240, 180);

            // Set the grid style to circular grid
            c.setGridStyle(false);

            // Set angular axis as 0 - 360, with a spoke every 30 units
            c.angularAxis().setLinearScale(0, 360, 30);

            // Add a polar vector layer to the chart with blue (0000ff) vectors
            c.addVectorLayer(radius, angle, magnitude, direction, Chart.RadialAxisScale, 0x0000ff);

            // Output the chart
            viewer.Chart = c;

            //include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("clickable", "",
                "title='Vector at ({value}, {angle} deg): Length = {len}, Angle = {dir} deg'");
        }
    }
}

[ASP.NET Web Forms - C# version] NetWebCharts\CSharpASP\polarvector.aspx
(Click here on how to convert this code to code-behind style.)
<%@ Page Language="C#" Debug="true" %>
<%@ Import Namespace="ChartDirector" %>
<%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %>

<!DOCTYPE html>

<script runat="server">

//
// Page Load event handler
//
protected void Page_Load(object sender, EventArgs e)
{
    // Coordinates of the starting points of the vectors
    double[] radius = {5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
        10, 10, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 20, 20, 20, 20, 20, 20, 20, 20, 20,
        20, 20, 20, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25};
    double[] angle = {0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120,
        150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0,
        30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120, 150, 180, 210, 240,
        270, 300, 330};

    // Magnitude and direction of the vectors
    double[] magnitude = {5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3,
        3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1,
        1, 1, 1, 1};
    double[] direction = {60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120, 150,
        180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30,
        60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120, 150, 180, 210, 240, 270,
        300, 330, 0, 30};

    // Create a PolarChart object of size 460 x 460 pixels
    PolarChart c = new PolarChart(460, 460);

    // Add a title to the chart at the top left corner using 15pt Arial Bold Italic font
    c.addTitle("Polar Vector Chart Demonstration", "Arial Bold Italic", 15);

    // Set center of plot area at (230, 240) with radius 180 pixels
    c.setPlotArea(230, 240, 180);

    // Set the grid style to circular grid
    c.setGridStyle(false);

    // Set angular axis as 0 - 360, with a spoke every 30 units
    c.angularAxis().setLinearScale(0, 360, 30);

    // Add a polar vector layer to the chart with blue (0000ff) vectors
    c.addVectorLayer(radius, angle, magnitude, direction, Chart.RadialAxisScale, 0x0000ff);

    // Output the chart
    WebChartViewer1.Image = c.makeWebImage(Chart.PNG);

    // Include tool tip for the chart
    WebChartViewer1.ImageMap = c.getHTMLImageMap("", "",
        "title='Vector at ({value}, {angle} deg): Length = {len}, Angle = {dir} deg'");
}

</script>

<html>
<body>
    <chart:WebChartViewer id="WebChartViewer1" runat="server" />
</body>
</html>

[ASP.NET Web Forms - VB Version] NetWebCharts\VBNetASP\polarvector.aspx
(Click here on how to convert this code to code-behind style.)
<%@ Page Language="VB" Debug="true" %>
<%@ Import Namespace="ChartDirector" %>
<%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %>

<!DOCTYPE html>

<script runat="server">

'
' Page Load event handler
'
Protected Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)

    ' Coordinates of the starting points of the vectors
    Dim radius() As Double = {5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 10, 10, 10, 10, 10, 10, 10, 10, _
        10, 10, 10, 10, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 20, 20, 20, 20, 20, 20, _
        20, 20, 20, 20, 20, 20, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25}
    Dim angle() As Double = {0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, _
        120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, _
        330, 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120, 150, 180, _
        210, 240, 270, 300, 330}

    ' Magnitude and direction of the vectors
    Dim magnitude() As Double = {5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, _
        4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, _
        1, 1, 1, 1, 1, 1, 1, 1}
    Dim direction() As Double = {60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, _
        120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, _
        330, 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120, 150, 180, _
        210, 240, 270, 300, 330, 0, 30}

    ' Create a PolarChart object of size 460 x 460 pixels
    Dim c As PolarChart = New PolarChart(460, 460)

    ' Add a title to the chart at the top left corner using 15pt Arial Bold Italic font
    c.addTitle("Polar Vector Chart Demonstration", "Arial Bold Italic", 15)

    ' Set center of plot area at (230, 240) with radius 180 pixels
    c.setPlotArea(230, 240, 180)

    ' Set the grid style to circular grid
    c.setGridStyle(False)

    ' Set angular axis as 0 - 360, with a spoke every 30 units
    c.angularAxis().setLinearScale(0, 360, 30)

    ' Add a polar vector layer to the chart with blue (0000ff) vectors
    c.addVectorLayer(radius, angle, magnitude, direction, Chart.RadialAxisScale, &H0000ff)

    ' Output the chart
    WebChartViewer1.Image = c.makeWebImage(Chart.PNG)

    ' Include tool tip for the chart
    WebChartViewer1.ImageMap = c.getHTMLImageMap("", "", _
        "title='Vector at ({value}, {angle} deg): Length = {len}, Angle = {dir} deg'")

End Sub

</script>

<html>
<body>
    <chart:WebChartViewer id="WebChartViewer1" runat="server" />
</body>
</html>

[ASP.NET MVC - Controller] NetMvcCharts\Controllers\PolarvectorController.cs
using System;
using System.Web.Mvc;
using ChartDirector;

namespace NetMvcCharts.Controllers
{
    public class PolarvectorController : Controller
    {
        //
        // Default Action
        //
        public ActionResult Index()
        {
            ViewBag.Title = "Polar Vector Chart";
            createChart(ViewBag.Viewer = new RazorChartViewer(HttpContext, "chart1"));
            return View("~/Views/Shared/ChartView.cshtml");
        }

        //
        // Create chart
        //
        private void createChart(RazorChartViewer viewer)
        {
            // Coordinates of the starting points of the vectors
            double[] radius = {5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 10, 10, 10, 10, 10, 10, 10, 10, 10,
                10, 10, 10, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 20, 20, 20, 20, 20, 20, 20,
                20, 20, 20, 20, 20, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25};
            double[] angle = {0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120,
                150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330,
                0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120, 150, 180, 210,
                240, 270, 300, 330};

            // Magnitude and direction of the vectors
            double[] magnitude = {5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
                3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1,
                1, 1, 1, 1, 1, 1};
            double[] direction = {60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120,
                150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330,
                0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 0, 30, 60, 90, 120, 150, 180, 210,
                240, 270, 300, 330, 0, 30};

            // Create a PolarChart object of size 460 x 460 pixels
            PolarChart c = new PolarChart(460, 460);

            // Add a title to the chart at the top left corner using 15pt Arial Bold Italic font
            c.addTitle("Polar Vector Chart Demonstration", "Arial Bold Italic", 15);

            // Set center of plot area at (230, 240) with radius 180 pixels
            c.setPlotArea(230, 240, 180);

            // Set the grid style to circular grid
            c.setGridStyle(false);

            // Set angular axis as 0 - 360, with a spoke every 30 units
            c.angularAxis().setLinearScale(0, 360, 30);

            // Add a polar vector layer to the chart with blue (0000ff) vectors
            c.addVectorLayer(radius, angle, magnitude, direction, Chart.RadialAxisScale, 0x0000ff);

            // Output the chart
            viewer.Image = c.makeWebImage(Chart.PNG);

            // Include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("", "",
                "title='Vector at ({value}, {angle} deg): Length = {len}, Angle = {dir} deg'");
        }
    }
}

[ASP.NET MVC - View] NetMvcCharts\Views\Shared\ChartView.cshtml
@{ Layout = null; }

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>@ViewBag.Title</title>
</head>
<body style="margin:5px 0px 0px 5px">
    <div style="font:bold 18pt verdana;">
        @ViewBag.Title
    </div>
    <hr style="border:solid 1px #000080" />
    <div>
        @{
            if (ViewBag.Viewer is Array)
            {
                // Display multiple charts
                for (int i = 0; i < ViewBag.Viewer.Length; ++i)
                {
                    @:@Html.Raw(ViewBag.Viewer[i].RenderHTML())
                }
            }
            else
            {
                // Display one chart only
                @:@Html.Raw(ViewBag.Viewer.RenderHTML())
            }
        }
    </div>
</body>
</html>