ChartDirector 5.1 (.NET Edition)

Scattered Data Contour Chart



This example demonstrates using scattered data for the contour layer.

In previous contour chart examples, the data are gridded, which means the data points lie on a rectangular grid.

ChartDirector also supports scattered data points, which means the data points can be at arbitrary positions. In this example, in additional to a contour layer added using XYChart.addContourLayer, there is also a scatter layer added using XYChart.addScatterLayer to show the positions of the data points.

Source Code Listing

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

[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 img is unused because this demo only has 1 chart.
    Public Sub createChart(viewer As WinChartViewer, img As String) _
        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

[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 img is unused because this demo only has 1 chart.
        public void createChart(WinChartViewer viewer, string img)
        {
            // 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;
        }
    }
}

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