ChartDirector 6.2 (.NET Edition)

Contour Chart

This example demonstrates creating a contour chart.

• The contour chart is created by adding a ContourLayer to the chart using XYChart.addContourLayer.

• By default, grid lines are drawn at the background of the plot area and so are behind all chart layers. In this example, PlotArea.moveGridBefore is used to move the grid lines in front of the contour layer.

• The color axis (visually represented as the color legend) is positioned vertically to the right of the plot area using ContourLayer.setColorAxis.

Source Code Listing

[Windows Forms - C# version] NetWinCharts\CSharpWinCharts\contour.cs
 ```using System; using ChartDirector; namespace CSharpChartExplorer { public class contour : DemoModule { //Name of demo module public string getName() { return "Contour 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) { // The x and y coordinates of the grid double[] dataX = {-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; double[] dataY = {-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; // The values at the grid points. In this example, we will compute the values using the // formula z = x * sin(y) + y * sin(x). double[] dataZ = new double[dataX.Length * dataY.Length]; for(int yIndex = 0; yIndex < dataY.Length; ++yIndex) { double y = dataY[yIndex]; for(int xIndex = 0; xIndex < dataX.Length; ++xIndex) { double x = dataX[xIndex]; dataZ[yIndex * dataX.Length + xIndex] = x * Math.Sin(y) + y * Math.Sin(x); } } // Create a XYChart object of size 600 x 500 pixels XYChart c = new XYChart(600, 500); // Add a title to the chart using 15 points Arial Bold Italic font c.addTitle("z = x * sin(y) + y * sin(x) ", "Arial Bold Italic", 15); // Set the plotarea at (75, 40) and of size 400 x 400 pixels. Use semi-transparent black // (80000000) dotted lines for both horizontal and vertical grid lines c.setPlotArea(75, 40, 400, 400, -1, -1, -1, c.dashLineColor(unchecked((int)0x80000000), Chart.DotLine), -1); // Set x-axis and y-axis title using 12 points Arial Bold Italic font c.xAxis().setTitle("X-Axis Title Place Holder", "Arial Bold Italic", 12); c.yAxis().setTitle("Y-Axis Title Place Holder", "Arial Bold Italic", 12); // Set x-axis and y-axis labels to use Arial Bold font c.xAxis().setLabelStyle("Arial Bold"); c.yAxis().setLabelStyle("Arial Bold"); // When auto-scaling, use tick spacing of 40 pixels as a guideline c.yAxis().setTickDensity(40); c.xAxis().setTickDensity(40); // Add a contour layer using the given data ContourLayer layer = c.addContourLayer(dataX, dataY, dataZ); // Move the grid lines in front of the contour layer c.getPlotArea().moveGridBefore(layer); // Add a color axis (the legend) in which the top left corner is anchored at (505, 40). // Set the length to 400 pixels and the labels on the right side. ColorAxis cAxis = layer.setColorAxis(505, 40, Chart.TopLeft, 400, Chart.Right); // Add a title to the color axis using 12 points Arial Bold Italic font cAxis.setTitle("Color Legend Title Place Holder", "Arial Bold Italic", 12); // Set color axis labels to use Arial Bold font cAxis.setLabelStyle("Arial Bold"); // Output the chart viewer.Chart = c; } } }```

[Windows Forms - VB Version] NetWinCharts\VBNetWinCharts\contour.vb
 ```Imports System Imports Microsoft.VisualBasic Imports ChartDirector Public Class contour Implements DemoModule 'Name of demo module Public Function getName() As String Implements DemoModule.getName Return "Contour 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 ' The x and y coordinates of the grid Dim dataX() As Double = {-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, _ 8, 9, 10} Dim dataY() As Double = {-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, _ 8, 9, 10} ' The values at the grid points. In this example, we will compute the values using the ' formula z = x * sin(y) + y * sin(x). Dim dataZ((UBound(dataX) + 1) * (UBound(dataY) + 1) - 1) As Double For yIndex As Integer = 0 To UBound(dataY) Dim y As Double = dataY(yIndex) For xIndex As Integer = 0 To UBound(dataX) Dim x As Double = dataX(xIndex) dataZ(yIndex * (UBound(dataX) + 1) + xIndex) = x * Math.Sin(y) + y * Math.Sin(x) Next Next ' Create a XYChart object of size 600 x 500 pixels Dim c As XYChart = New XYChart(600, 500) ' Add a title to the chart using 15 points Arial Bold Italic font c.addTitle("z = x * sin(y) + y * sin(x) ", "Arial Bold Italic", 15) ' Set the plotarea at (75, 40) and of size 400 x 400 pixels. Use semi-transparent black ' (80000000) dotted lines for both horizontal and vertical grid lines c.setPlotArea(75, 40, 400, 400, -1, -1, -1, c.dashLineColor(&H80000000, Chart.DotLine), -1) ' Set x-axis and y-axis title using 12 points Arial Bold Italic font c.xAxis().setTitle("X-Axis Title Place Holder", "Arial Bold Italic", 12) c.yAxis().setTitle("Y-Axis Title Place Holder", "Arial Bold Italic", 12) ' Set x-axis and y-axis labels to use Arial Bold font c.xAxis().setLabelStyle("Arial Bold") c.yAxis().setLabelStyle("Arial Bold") ' When auto-scaling, use tick spacing of 40 pixels as a guideline c.yAxis().setTickDensity(40) c.xAxis().setTickDensity(40) ' Add a contour layer using the given data Dim layer As ContourLayer = c.addContourLayer(dataX, dataY, dataZ) ' Move the grid lines in front of the contour layer c.getPlotArea().moveGridBefore(layer) ' Add a color axis (the legend) in which the top left corner is anchored at (505, 40). Set ' the length to 400 pixels and the labels on the right side. Dim cAxis As ColorAxis = layer.setColorAxis(505, 40, Chart.TopLeft, 400, Chart.Right) ' Add a title to the color axis using 12 points Arial Bold Italic font cAxis.setTitle("Color Legend Title Place Holder", "Arial Bold Italic", 12) ' Set color axis labels to use Arial Bold font cAxis.setLabelStyle("Arial Bold") ' Output the chart viewer.Chart = c End Sub End Class```

[WPF - C#] NetWPFCharts\contour.cs
 ```using System; using ChartDirector; namespace CSharpWPFDemo { public class contour : DemoModule { //Name of demo module public string getName() { return "Contour 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) { // The x and y coordinates of the grid double[] dataX = {-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; double[] dataY = {-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; // The values at the grid points. In this example, we will compute the values using the // formula z = x * sin(y) + y * sin(x). double[] dataZ = new double[dataX.Length * dataY.Length]; for(int yIndex = 0; yIndex < dataY.Length; ++yIndex) { double y = dataY[yIndex]; for(int xIndex = 0; xIndex < dataX.Length; ++xIndex) { double x = dataX[xIndex]; dataZ[yIndex * dataX.Length + xIndex] = x * Math.Sin(y) + y * Math.Sin(x); } } // Create a XYChart object of size 600 x 500 pixels XYChart c = new XYChart(600, 500); // Add a title to the chart using 15 points Arial Bold Italic font c.addTitle("z = x * sin(y) + y * sin(x) ", "Arial Bold Italic", 15); // Set the plotarea at (75, 40) and of size 400 x 400 pixels. Use semi-transparent black // (80000000) dotted lines for both horizontal and vertical grid lines c.setPlotArea(75, 40, 400, 400, -1, -1, -1, c.dashLineColor(unchecked((int)0x80000000), Chart.DotLine), -1); // Set x-axis and y-axis title using 12 points Arial Bold Italic font c.xAxis().setTitle("X-Axis Title Place Holder", "Arial Bold Italic", 12); c.yAxis().setTitle("Y-Axis Title Place Holder", "Arial Bold Italic", 12); // Set x-axis and y-axis labels to use Arial Bold font c.xAxis().setLabelStyle("Arial Bold"); c.yAxis().setLabelStyle("Arial Bold"); // When auto-scaling, use tick spacing of 40 pixels as a guideline c.yAxis().setTickDensity(40); c.xAxis().setTickDensity(40); // Add a contour layer using the given data ContourLayer layer = c.addContourLayer(dataX, dataY, dataZ); // Move the grid lines in front of the contour layer c.getPlotArea().moveGridBefore(layer); // Add a color axis (the legend) in which the top left corner is anchored at (505, 40). // Set the length to 400 pixels and the labels on the right side. ColorAxis cAxis = layer.setColorAxis(505, 40, Chart.TopLeft, 400, Chart.Right); // Add a title to the color axis using 12 points Arial Bold Italic font cAxis.setTitle("Color Legend Title Place Holder", "Arial Bold Italic", 12); // Set color axis labels to use Arial Bold font cAxis.setLabelStyle("Arial Bold"); // Output the chart viewer.Chart = c; } } }```

[ASP.NET Web Forms - C# version] NetWebCharts\CSharpASP\contour.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" %> ```

[ASP.NET Web Forms - VB Version] NetWebCharts\VBNetASP\contour.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" %> ```

[ASP.NET MVC - Controller] NetMvcCharts\Controllers\ContourController.cs
 ```using System; using System.Web.Mvc; using ChartDirector; namespace NetMvcCharts.Controllers { public class ContourController : Controller { // // Default Action // public ActionResult Index() { ViewBag.Title = "Contour Chart"; createChart(ViewBag.Viewer = new RazorChartViewer(HttpContext, "chart1")); return View("~/Views/Shared/ChartView.cshtml"); } // // Create chart // private void createChart(RazorChartViewer viewer) { // The x and y coordinates of the grid double[] dataX = {-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; double[] dataY = {-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; // The values at the grid points. In this example, we will compute the values using the // formula z = x * sin(y) + y * sin(x). double[] dataZ = new double[dataX.Length * dataY.Length]; for(int yIndex = 0; yIndex < dataY.Length; ++yIndex) { double y = dataY[yIndex]; for(int xIndex = 0; xIndex < dataX.Length; ++xIndex) { double x = dataX[xIndex]; dataZ[yIndex * dataX.Length + xIndex] = x * Math.Sin(y) + y * Math.Sin(x); } } // Create a XYChart object of size 600 x 500 pixels XYChart c = new XYChart(600, 500); // Add a title to the chart using 15 points Arial Bold Italic font c.addTitle("z = x * sin(y) + y * sin(x) ", "Arial Bold Italic", 15); // Set the plotarea at (75, 40) and of size 400 x 400 pixels. Use semi-transparent black // (80000000) dotted lines for both horizontal and vertical grid lines c.setPlotArea(75, 40, 400, 400, -1, -1, -1, c.dashLineColor(unchecked((int)0x80000000), Chart.DotLine), -1); // Set x-axis and y-axis title using 12 points Arial Bold Italic font c.xAxis().setTitle("X-Axis Title Place Holder", "Arial Bold Italic", 12); c.yAxis().setTitle("Y-Axis Title Place Holder", "Arial Bold Italic", 12); // Set x-axis and y-axis labels to use Arial Bold font c.xAxis().setLabelStyle("Arial Bold"); c.yAxis().setLabelStyle("Arial Bold"); // When auto-scaling, use tick spacing of 40 pixels as a guideline c.yAxis().setTickDensity(40); c.xAxis().setTickDensity(40); // Add a contour layer using the given data ContourLayer layer = c.addContourLayer(dataX, dataY, dataZ); // Move the grid lines in front of the contour layer c.getPlotArea().moveGridBefore(layer); // Add a color axis (the legend) in which the top left corner is anchored at (505, 40). Set // the length to 400 pixels and the labels on the right side. ColorAxis cAxis = layer.setColorAxis(505, 40, Chart.TopLeft, 400, Chart.Right); // Add a title to the color axis using 12 points Arial Bold Italic font cAxis.setTitle("Color Legend Title Place Holder", "Arial Bold Italic", 12); // Set color axis labels to use Arial Bold font cAxis.setLabelStyle("Arial Bold"); // Output the chart viewer.Image = c.makeWebImage(Chart.PNG); } } }```

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

@{ 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()) } }
```