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
 ```<%@ Page Language="C#" Debug="true" %> <%@ Import Namespace="ChartDirector" %> <%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %> ```

[ASP.NET Web Forms - VB Version] NetWebCharts\VBNetASP\polarvector.aspx
 ```<%@ Page Language="VB" Debug="true" %> <%@ Import Namespace="ChartDirector" %> <%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %> ```
 ```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'"); } } }```
 ```@{ Layout = null; } @ViewBag.Title