ChartDirector 6.2 (.NET Edition)

Scattered Data Contour Chart




This example demonstrates using scattered data to create a ContourLayer.

In the previous Contour Chart example, the data points lie on a grid. ChartDirector also supports using scattered data points, which means the data points can be at irregular positions. To distinguish between the two case, if the number of z coordinates is equal to the product of the number of x and y coordinates, ChartDirector will assume the x and y coordinates define the grid and the z coordinates are values of the points on the grid. If the number of x, y and z coordinates are equal, ChartDirector will assume they represent scatter points.

In this example, in additional to a ContourLayer added using XYChart.addContourLayer, there is also a ScatterLayer added using XYChart.addScatterLayer to show the positions of the data points.

Source Code Listing

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

namespace CSharpChartExplorer
{
    public class scattercontour : DemoModule
    {
        //Name of demo module
        public string getName() { return "Scattered Data 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, y, z) coordinates of the scattered data
            double[] dataX = {0.5, 1.9, 4.9, 1.0, 8.9, 9.8, 5.9, 2.9, 6.8, 9.0, 0.0, 8.9, 1.9, 4.8,
                2.4, 3.4, 7.9, 7.5, 4.8, 7.5, 9.5, 0.4, 8.9, 0.9, 5.4, 9.4, 2.9, 8.9, 0.9, 8.9,
                10.0, 1.0, 6.8, 3.8, 9.0, 5.3, 6.4, 4.9, 4.5, 2.0, 5.4, 0.0, 10.0, 3.9, 5.4, 5.9,
                5.8, 0.3, 4.4, 8.3};
            double[] dataY = {3.3, 3.0, 0.7, 1.0, 9.3, 4.5, 8.4, 0.1, 0.8, 0.1, 9.3, 1.8, 4.3, 1.3,
                2.3, 5.4, 6.9, 9.0, 9.8, 7.5, 1.8, 1.4, 4.5, 7.8, 3.8, 4.0, 2.9, 2.4, 3.9, 2.9, 2.3,
                9.3, 2.0, 3.4, 4.8, 2.3, 3.4, 2.3, 1.5, 7.8, 4.5, 0.9, 6.3, 2.4, 6.9, 2.8, 1.3, 2.9,
                6.4, 6.3};
            double[] dataZ = {6.6, 12.5, 7.4, 6.2, 9.6, 13.6, 19.9, 2.2, 6.9, 3.4, 8.7, 8.4, 7.8,
                8.0, 9.4, 11.9, 9.6, 15.7, 12.0, 13.3, 9.6, 6.4, 9.0, 6.9, 4.6, 9.7, 10.6, 9.2, 7.0,
                6.9, 9.7, 8.6, 8.0, 13.6, 13.2, 5.9, 9.0, 3.2, 8.3, 9.7, 8.2, 6.1, 8.7, 5.6, 14.9,
                9.8, 9.3, 5.1, 10.8, 9.8};

            // Create a XYChart object of size 450 x 540 pixels
            XYChart c = new XYChart(450, 540);

            // Add a title to the chart using 15 points Arial Italic font
            c.addTitle("      Contour Chart with Scattered Data", "Arial Italic", 15);

            // Set the plotarea at (65, 40) and of size 360 x 360 pixels. Use semi-transparent black
            // (c0000000) for both horizontal and vertical grid lines
            c.setPlotArea(65, 40, 360, 360, -1, -1, -1, unchecked((int)0xc0000000), -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", 10);
            c.yAxis().setTitle("Y-Axis Title Place Holder", "Arial Bold Italic", 10);

            // Set x-axis and y-axis labels to use Arial Bold font
            c.xAxis().setLabelStyle("Arial Bold");
            c.yAxis().setLabelStyle("Arial Bold");

            // When x-axis and y-axis color to transparent
            c.xAxis().setColors(Chart.Transparent);
            c.yAxis().setColors(Chart.Transparent);

            // Add a scatter layer to the chart to show the position of the data points
            c.addScatterLayer(dataX, dataY, "", Chart.Cross2Shape(0.2), 7, 0x000000);

            // 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 center is anchored at (245, 455). Set
            // the length to 330 pixels and the labels on the top side.
            ColorAxis cAxis = layer.setColorAxis(245, 455, Chart.TopCenter, 330, Chart.Top);

            // Add a bounding box to the color axis using the default line color as border.
            cAxis.setBoundingBox(Chart.Transparent, Chart.LineColor);

            // Add a title to the color axis using 12 points Arial Bold Italic font
            cAxis.setTitle("Color Legend Title Place Holder", "Arial Bold Italic", 10);

            // Set color axis labels to use Arial Bold font
            cAxis.setLabelStyle("Arial Bold");

            // Set the color axis range as 0 to 20, with a step every 2 units
            cAxis.setLinearScale(0, 20, 2);

            // Output the chart
            viewer.Chart = c;
        }
    }
}

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

Public Class scattercontour
    Implements DemoModule

    'Name of demo module
    Public Function getName() As String Implements DemoModule.getName
        Return "Scattered Data 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, y, z) coordinates of the scattered data
        Dim dataX() As Double = {0.5, 1.9, 4.9, 1.0, 8.9, 9.8, 5.9, 2.9, 6.8, 9.0, 0.0, 8.9, 1.9, _
            4.8, 2.4, 3.4, 7.9, 7.5, 4.8, 7.5, 9.5, 0.4, 8.9, 0.9, 5.4, 9.4, 2.9, 8.9, 0.9, 8.9, _
            10.0, 1.0, 6.8, 3.8, 9.0, 5.3, 6.4, 4.9, 4.5, 2.0, 5.4, 0.0, 10.0, 3.9, 5.4, 5.9, 5.8, _
            0.3, 4.4, 8.3}
        Dim dataY() As Double = {3.3, 3.0, 0.7, 1.0, 9.3, 4.5, 8.4, 0.1, 0.8, 0.1, 9.3, 1.8, 4.3, _
            1.3, 2.3, 5.4, 6.9, 9.0, 9.8, 7.5, 1.8, 1.4, 4.5, 7.8, 3.8, 4.0, 2.9, 2.4, 3.9, 2.9, _
            2.3, 9.3, 2.0, 3.4, 4.8, 2.3, 3.4, 2.3, 1.5, 7.8, 4.5, 0.9, 6.3, 2.4, 6.9, 2.8, 1.3, _
            2.9, 6.4, 6.3}
        Dim dataZ() As Double = {6.6, 12.5, 7.4, 6.2, 9.6, 13.6, 19.9, 2.2, 6.9, 3.4, 8.7, 8.4, _
            7.8, 8.0, 9.4, 11.9, 9.6, 15.7, 12.0, 13.3, 9.6, 6.4, 9.0, 6.9, 4.6, 9.7, 10.6, 9.2, _
            7.0, 6.9, 9.7, 8.6, 8.0, 13.6, 13.2, 5.9, 9.0, 3.2, 8.3, 9.7, 8.2, 6.1, 8.7, 5.6, _
            14.9, 9.8, 9.3, 5.1, 10.8, 9.8}

        ' Create a XYChart object of size 450 x 540 pixels
        Dim c As XYChart = New XYChart(450, 540)

        ' Add a title to the chart using 15 points Arial Italic font
        c.addTitle("      Contour Chart with Scattered Data", "Arial Italic", 15)

        ' Set the plotarea at (65, 40) and of size 360 x 360 pixels. Use semi-transparent black
        ' (c0000000) for both horizontal and vertical grid lines
        c.setPlotArea(65, 40, 360, 360, -1, -1, -1, &Hc0000000, -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", 10)
        c.yAxis().setTitle("Y-Axis Title Place Holder", "Arial Bold Italic", 10)

        ' Set x-axis and y-axis labels to use Arial Bold font
        c.xAxis().setLabelStyle("Arial Bold")
        c.yAxis().setLabelStyle("Arial Bold")

        ' When x-axis and y-axis color to transparent
        c.xAxis().setColors(Chart.Transparent)
        c.yAxis().setColors(Chart.Transparent)

        ' Add a scatter layer to the chart to show the position of the data points
        c.addScatterLayer(dataX, dataY, "", Chart.Cross2Shape(0.2), 7, &H000000)

        ' 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 center is anchored at (245, 455). Set the
        ' length to 330 pixels and the labels on the top side.
        Dim cAxis As ColorAxis = layer.setColorAxis(245, 455, Chart.TopCenter, 330, Chart.Top)

        ' Add a bounding box to the color axis using the default line color as border.
        cAxis.setBoundingBox(Chart.Transparent, Chart.LineColor)

        ' Add a title to the color axis using 12 points Arial Bold Italic font
        cAxis.setTitle("Color Legend Title Place Holder", "Arial Bold Italic", 10)

        ' Set color axis labels to use Arial Bold font
        cAxis.setLabelStyle("Arial Bold")

        ' Set the color axis range as 0 to 20, with a step every 2 units
        cAxis.setLinearScale(0, 20, 2)

        ' Output the chart
        viewer.Chart = c

    End Sub

End Class

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

namespace CSharpWPFDemo
{
    public class scattercontour : DemoModule
    {
        //Name of demo module
        public string getName() { return "Scattered Data 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, y, z) coordinates of the scattered data
            double[] dataX = {0.5, 1.9, 4.9, 1.0, 8.9, 9.8, 5.9, 2.9, 6.8, 9.0, 0.0, 8.9, 1.9, 4.8,
                2.4, 3.4, 7.9, 7.5, 4.8, 7.5, 9.5, 0.4, 8.9, 0.9, 5.4, 9.4, 2.9, 8.9, 0.9, 8.9,
                10.0, 1.0, 6.8, 3.8, 9.0, 5.3, 6.4, 4.9, 4.5, 2.0, 5.4, 0.0, 10.0, 3.9, 5.4, 5.9,
                5.8, 0.3, 4.4, 8.3};
            double[] dataY = {3.3, 3.0, 0.7, 1.0, 9.3, 4.5, 8.4, 0.1, 0.8, 0.1, 9.3, 1.8, 4.3, 1.3,
                2.3, 5.4, 6.9, 9.0, 9.8, 7.5, 1.8, 1.4, 4.5, 7.8, 3.8, 4.0, 2.9, 2.4, 3.9, 2.9, 2.3,
                9.3, 2.0, 3.4, 4.8, 2.3, 3.4, 2.3, 1.5, 7.8, 4.5, 0.9, 6.3, 2.4, 6.9, 2.8, 1.3, 2.9,
                6.4, 6.3};
            double[] dataZ = {6.6, 12.5, 7.4, 6.2, 9.6, 13.6, 19.9, 2.2, 6.9, 3.4, 8.7, 8.4, 7.8,
                8.0, 9.4, 11.9, 9.6, 15.7, 12.0, 13.3, 9.6, 6.4, 9.0, 6.9, 4.6, 9.7, 10.6, 9.2, 7.0,
                6.9, 9.7, 8.6, 8.0, 13.6, 13.2, 5.9, 9.0, 3.2, 8.3, 9.7, 8.2, 6.1, 8.7, 5.6, 14.9,
                9.8, 9.3, 5.1, 10.8, 9.8};

            // Create a XYChart object of size 450 x 540 pixels
            XYChart c = new XYChart(450, 540);

            // Add a title to the chart using 15 points Arial Italic font
            c.addTitle("      Contour Chart with Scattered Data", "Arial Italic", 15);

            // Set the plotarea at (65, 40) and of size 360 x 360 pixels. Use semi-transparent black
            // (c0000000) for both horizontal and vertical grid lines
            c.setPlotArea(65, 40, 360, 360, -1, -1, -1, unchecked((int)0xc0000000), -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", 10);
            c.yAxis().setTitle("Y-Axis Title Place Holder", "Arial Bold Italic", 10);

            // Set x-axis and y-axis labels to use Arial Bold font
            c.xAxis().setLabelStyle("Arial Bold");
            c.yAxis().setLabelStyle("Arial Bold");

            // When x-axis and y-axis color to transparent
            c.xAxis().setColors(Chart.Transparent);
            c.yAxis().setColors(Chart.Transparent);

            // Add a scatter layer to the chart to show the position of the data points
            c.addScatterLayer(dataX, dataY, "", Chart.Cross2Shape(0.2), 7, 0x000000);

            // 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 center is anchored at (245, 455). Set
            // the length to 330 pixels and the labels on the top side.
            ColorAxis cAxis = layer.setColorAxis(245, 455, Chart.TopCenter, 330, Chart.Top);

            // Add a bounding box to the color axis using the default line color as border.
            cAxis.setBoundingBox(Chart.Transparent, Chart.LineColor);

            // Add a title to the color axis using 12 points Arial Bold Italic font
            cAxis.setTitle("Color Legend Title Place Holder", "Arial Bold Italic", 10);

            // Set color axis labels to use Arial Bold font
            cAxis.setLabelStyle("Arial Bold");

            // Set the color axis range as 0 to 20, with a step every 2 units
            cAxis.setLinearScale(0, 20, 2);

            // Output the chart
            viewer.Chart = c;
        }
    }
}

[ASP.NET Web Forms - C# version] NetWebCharts\CSharpASP\scattercontour.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)
{
    // The (x, y, z) coordinates of the scattered data
    double[] dataX = {0.5, 1.9, 4.9, 1.0, 8.9, 9.8, 5.9, 2.9, 6.8, 9.0, 0.0, 8.9, 1.9, 4.8, 2.4,
        3.4, 7.9, 7.5, 4.8, 7.5, 9.5, 0.4, 8.9, 0.9, 5.4, 9.4, 2.9, 8.9, 0.9, 8.9, 10.0, 1.0, 6.8,
        3.8, 9.0, 5.3, 6.4, 4.9, 4.5, 2.0, 5.4, 0.0, 10.0, 3.9, 5.4, 5.9, 5.8, 0.3, 4.4, 8.3};
    double[] dataY = {3.3, 3.0, 0.7, 1.0, 9.3, 4.5, 8.4, 0.1, 0.8, 0.1, 9.3, 1.8, 4.3, 1.3, 2.3,
        5.4, 6.9, 9.0, 9.8, 7.5, 1.8, 1.4, 4.5, 7.8, 3.8, 4.0, 2.9, 2.4, 3.9, 2.9, 2.3, 9.3, 2.0,
        3.4, 4.8, 2.3, 3.4, 2.3, 1.5, 7.8, 4.5, 0.9, 6.3, 2.4, 6.9, 2.8, 1.3, 2.9, 6.4, 6.3};
    double[] dataZ = {6.6, 12.5, 7.4, 6.2, 9.6, 13.6, 19.9, 2.2, 6.9, 3.4, 8.7, 8.4, 7.8, 8.0, 9.4,
        11.9, 9.6, 15.7, 12.0, 13.3, 9.6, 6.4, 9.0, 6.9, 4.6, 9.7, 10.6, 9.2, 7.0, 6.9, 9.7, 8.6,
        8.0, 13.6, 13.2, 5.9, 9.0, 3.2, 8.3, 9.7, 8.2, 6.1, 8.7, 5.6, 14.9, 9.8, 9.3, 5.1, 10.8, 9.8
        };

    // Create a XYChart object of size 450 x 540 pixels
    XYChart c = new XYChart(450, 540);

    // Add a title to the chart using 15 points Arial Italic font
    c.addTitle("      Contour Chart with Scattered Data", "Arial Italic", 15);

    // Set the plotarea at (65, 40) and of size 360 x 360 pixels. Use semi-transparent black
    // (c0000000) for both horizontal and vertical grid lines
    c.setPlotArea(65, 40, 360, 360, -1, -1, -1, unchecked((int)0xc0000000), -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", 10);
    c.yAxis().setTitle("Y-Axis Title Place Holder", "Arial Bold Italic", 10);

    // Set x-axis and y-axis labels to use Arial Bold font
    c.xAxis().setLabelStyle("Arial Bold");
    c.yAxis().setLabelStyle("Arial Bold");

    // When x-axis and y-axis color to transparent
    c.xAxis().setColors(Chart.Transparent);
    c.yAxis().setColors(Chart.Transparent);

    // Add a scatter layer to the chart to show the position of the data points
    c.addScatterLayer(dataX, dataY, "", Chart.Cross2Shape(0.2), 7, 0x000000);

    // 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 center is anchored at (245, 455). Set the
    // length to 330 pixels and the labels on the top side.
    ColorAxis cAxis = layer.setColorAxis(245, 455, Chart.TopCenter, 330, Chart.Top);

    // Add a bounding box to the color axis using the default line color as border.
    cAxis.setBoundingBox(Chart.Transparent, Chart.LineColor);

    // Add a title to the color axis using 12 points Arial Bold Italic font
    cAxis.setTitle("Color Legend Title Place Holder", "Arial Bold Italic", 10);

    // Set color axis labels to use Arial Bold font
    cAxis.setLabelStyle("Arial Bold");

    // Set the color axis range as 0 to 20, with a step every 2 units
    cAxis.setLinearScale(0, 20, 2);

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

</script>

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

[ASP.NET Web Forms - VB Version] NetWebCharts\VBNetASP\scattercontour.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)

    ' The (x, y, z) coordinates of the scattered data
    Dim dataX() As Double = {0.5, 1.9, 4.9, 1.0, 8.9, 9.8, 5.9, 2.9, 6.8, 9.0, 0.0, 8.9, 1.9, 4.8, _
        2.4, 3.4, 7.9, 7.5, 4.8, 7.5, 9.5, 0.4, 8.9, 0.9, 5.4, 9.4, 2.9, 8.9, 0.9, 8.9, 10.0, 1.0, _
        6.8, 3.8, 9.0, 5.3, 6.4, 4.9, 4.5, 2.0, 5.4, 0.0, 10.0, 3.9, 5.4, 5.9, 5.8, 0.3, 4.4, 8.3}
    Dim dataY() As Double = {3.3, 3.0, 0.7, 1.0, 9.3, 4.5, 8.4, 0.1, 0.8, 0.1, 9.3, 1.8, 4.3, 1.3, _
        2.3, 5.4, 6.9, 9.0, 9.8, 7.5, 1.8, 1.4, 4.5, 7.8, 3.8, 4.0, 2.9, 2.4, 3.9, 2.9, 2.3, 9.3, _
        2.0, 3.4, 4.8, 2.3, 3.4, 2.3, 1.5, 7.8, 4.5, 0.9, 6.3, 2.4, 6.9, 2.8, 1.3, 2.9, 6.4, 6.3}
    Dim dataZ() As Double = {6.6, 12.5, 7.4, 6.2, 9.6, 13.6, 19.9, 2.2, 6.9, 3.4, 8.7, 8.4, 7.8, _
        8.0, 9.4, 11.9, 9.6, 15.7, 12.0, 13.3, 9.6, 6.4, 9.0, 6.9, 4.6, 9.7, 10.6, 9.2, 7.0, 6.9, _
        9.7, 8.6, 8.0, 13.6, 13.2, 5.9, 9.0, 3.2, 8.3, 9.7, 8.2, 6.1, 8.7, 5.6, 14.9, 9.8, 9.3, _
        5.1, 10.8, 9.8}

    ' Create a XYChart object of size 450 x 540 pixels
    Dim c As XYChart = New XYChart(450, 540)

    ' Add a title to the chart using 15 points Arial Italic font
    c.addTitle("      Contour Chart with Scattered Data", "Arial Italic", 15)

    ' Set the plotarea at (65, 40) and of size 360 x 360 pixels. Use semi-transparent black
    ' (c0000000) for both horizontal and vertical grid lines
    c.setPlotArea(65, 40, 360, 360, -1, -1, -1, &Hc0000000, -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", 10)
    c.yAxis().setTitle("Y-Axis Title Place Holder", "Arial Bold Italic", 10)

    ' Set x-axis and y-axis labels to use Arial Bold font
    c.xAxis().setLabelStyle("Arial Bold")
    c.yAxis().setLabelStyle("Arial Bold")

    ' When x-axis and y-axis color to transparent
    c.xAxis().setColors(Chart.Transparent)
    c.yAxis().setColors(Chart.Transparent)

    ' Add a scatter layer to the chart to show the position of the data points
    c.addScatterLayer(dataX, dataY, "", Chart.Cross2Shape(0.2), 7, &H000000)

    ' 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 center is anchored at (245, 455). Set the
    ' length to 330 pixels and the labels on the top side.
    Dim cAxis As ColorAxis = layer.setColorAxis(245, 455, Chart.TopCenter, 330, Chart.Top)

    ' Add a bounding box to the color axis using the default line color as border.
    cAxis.setBoundingBox(Chart.Transparent, Chart.LineColor)

    ' Add a title to the color axis using 12 points Arial Bold Italic font
    cAxis.setTitle("Color Legend Title Place Holder", "Arial Bold Italic", 10)

    ' Set color axis labels to use Arial Bold font
    cAxis.setLabelStyle("Arial Bold")

    ' Set the color axis range as 0 to 20, with a step every 2 units
    cAxis.setLinearScale(0, 20, 2)

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

End Sub

</script>

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

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

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

        //
        // Create chart
        //
        private void createChart(RazorChartViewer viewer)
        {
            // The (x, y, z) coordinates of the scattered data
            double[] dataX = {0.5, 1.9, 4.9, 1.0, 8.9, 9.8, 5.9, 2.9, 6.8, 9.0, 0.0, 8.9, 1.9, 4.8, 2.4,
                3.4, 7.9, 7.5, 4.8, 7.5, 9.5, 0.4, 8.9, 0.9, 5.4, 9.4, 2.9, 8.9, 0.9, 8.9, 10.0, 1.0,
                6.8, 3.8, 9.0, 5.3, 6.4, 4.9, 4.5, 2.0, 5.4, 0.0, 10.0, 3.9, 5.4, 5.9, 5.8, 0.3, 4.4, 8.3
                };
            double[] dataY = {3.3, 3.0, 0.7, 1.0, 9.3, 4.5, 8.4, 0.1, 0.8, 0.1, 9.3, 1.8, 4.3, 1.3, 2.3,
                5.4, 6.9, 9.0, 9.8, 7.5, 1.8, 1.4, 4.5, 7.8, 3.8, 4.0, 2.9, 2.4, 3.9, 2.9, 2.3, 9.3, 2.0,
                3.4, 4.8, 2.3, 3.4, 2.3, 1.5, 7.8, 4.5, 0.9, 6.3, 2.4, 6.9, 2.8, 1.3, 2.9, 6.4, 6.3};
            double[] dataZ = {6.6, 12.5, 7.4, 6.2, 9.6, 13.6, 19.9, 2.2, 6.9, 3.4, 8.7, 8.4, 7.8, 8.0,
                9.4, 11.9, 9.6, 15.7, 12.0, 13.3, 9.6, 6.4, 9.0, 6.9, 4.6, 9.7, 10.6, 9.2, 7.0, 6.9, 9.7,
                8.6, 8.0, 13.6, 13.2, 5.9, 9.0, 3.2, 8.3, 9.7, 8.2, 6.1, 8.7, 5.6, 14.9, 9.8, 9.3, 5.1,
                10.8, 9.8};

            // Create a XYChart object of size 450 x 540 pixels
            XYChart c = new XYChart(450, 540);

            // Add a title to the chart using 15 points Arial Italic font
            c.addTitle("      Contour Chart with Scattered Data", "Arial Italic", 15);

            // Set the plotarea at (65, 40) and of size 360 x 360 pixels. Use semi-transparent black
            // (c0000000) for both horizontal and vertical grid lines
            c.setPlotArea(65, 40, 360, 360, -1, -1, -1, unchecked((int)0xc0000000), -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", 10);
            c.yAxis().setTitle("Y-Axis Title Place Holder", "Arial Bold Italic", 10);

            // Set x-axis and y-axis labels to use Arial Bold font
            c.xAxis().setLabelStyle("Arial Bold");
            c.yAxis().setLabelStyle("Arial Bold");

            // When x-axis and y-axis color to transparent
            c.xAxis().setColors(Chart.Transparent);
            c.yAxis().setColors(Chart.Transparent);

            // Add a scatter layer to the chart to show the position of the data points
            c.addScatterLayer(dataX, dataY, "", Chart.Cross2Shape(0.2), 7, 0x000000);

            // 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 center is anchored at (245, 455). Set the
            // length to 330 pixels and the labels on the top side.
            ColorAxis cAxis = layer.setColorAxis(245, 455, Chart.TopCenter, 330, Chart.Top);

            // Add a bounding box to the color axis using the default line color as border.
            cAxis.setBoundingBox(Chart.Transparent, Chart.LineColor);

            // Add a title to the color axis using 12 points Arial Bold Italic font
            cAxis.setTitle("Color Legend Title Place Holder", "Arial Bold Italic", 10);

            // Set color axis labels to use Arial Bold font
            cAxis.setLabelStyle("Arial Bold");

            // Set the color axis range as 0 to 20, with a step every 2 units
            cAxis.setLinearScale(0, 20, 2);

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

[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>