ChartDirector 6.2 (.NET Edition)

Log Scale Axis


  

This example demonstrates using a log scale axis versus a linear scale axis.

In ChartDirector, log scale axis can be configured using Axis.setLogScale, Axis.setLogScale2 or Axis.setLogScale3.

Source Code Listing

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

namespace CSharpChartExplorer
{
    public class logaxis : DemoModule
    {
        //Name of demo module
        public string getName() { return "Log Scale Axis"; }

        //Number of charts produced in this demo module
        public int getNoOfCharts() { return 2; }

        //Main code for creating charts
        public void createChart(WinChartViewer viewer, int chartIndex)
        {
            // The data for the chart
            double[] data = {100, 125, 260, 147, 67};
            string[] labels = {"Mon", "Tue", "Wed", "Thu", "Fri"};

            // Create a XYChart object of size 200 x 180 pixels
            XYChart c = new XYChart(200, 180);

            // Set the plot area at (30, 10) and of size 140 x 130 pixels
            c.setPlotArea(30, 10, 140, 130);

            // Ise log scale axis if required
            if (chartIndex == 1) {
                c.yAxis().setLogScale3();
            }

            // Set the labels on the x axis
            c.xAxis().setLabels(labels);

            // Add a color bar layer using the given data. Use a 1 pixel 3D border for the bars.
            c.addBarLayer3(data).setBorderColor(-1, 1);

            // Output the chart
            viewer.Chart = c;

            //include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("clickable", "",
                "title='Mileage on {xLabel}: {value} miles'");
        }
    }
}

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

Public Class logaxis
    Implements DemoModule

    'Name of demo module
    Public Function getName() As String Implements DemoModule.getName
        Return "Log Scale Axis"
    End Function

    'Number of charts produced in this demo module
    Public Function getNoOfCharts() As Integer Implements DemoModule.getNoOfCharts
        Return 2
    End Function

    'Main code for creating charts
    Public Sub createChart(viewer As WinChartViewer, chartIndex As Integer) _
        Implements DemoModule.createChart

        ' The data for the chart
        Dim data() As Double = {100, 125, 260, 147, 67}
        Dim labels() As String = {"Mon", "Tue", "Wed", "Thu", "Fri"}

        ' Create a XYChart object of size 200 x 180 pixels
        Dim c As XYChart = New XYChart(200, 180)

        ' Set the plot area at (30, 10) and of size 140 x 130 pixels
        c.setPlotArea(30, 10, 140, 130)

        ' Ise log scale axis if required
        If chartIndex = 1 Then
            c.yAxis().setLogScale3()
        End If

        ' Set the labels on the x axis
        c.xAxis().setLabels(labels)

        ' Add a color bar layer using the given data. Use a 1 pixel 3D border for the bars.
        c.addBarLayer3(data).setBorderColor(-1, 1)

        ' Output the chart
        viewer.Chart = c

        'include tool tip for the chart
        viewer.ImageMap = c.getHTMLImageMap("clickable", "", _
            "title='Mileage on {xLabel}: {value} miles'")

    End Sub

End Class

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

namespace CSharpWPFDemo
{
    public class logaxis : DemoModule
    {
        //Name of demo module
        public string getName() { return "Log Scale Axis"; }

        //Number of charts produced in this demo module
        public int getNoOfCharts() { return 2; }

        //Main code for creating charts
        public void createChart(WPFChartViewer viewer, int chartIndex)
        {
            // The data for the chart
            double[] data = {100, 125, 260, 147, 67};
            string[] labels = {"Mon", "Tue", "Wed", "Thu", "Fri"};

            // Create a XYChart object of size 200 x 180 pixels
            XYChart c = new XYChart(200, 180);

            // Set the plot area at (30, 10) and of size 140 x 130 pixels
            c.setPlotArea(30, 10, 140, 130);

            // Ise log scale axis if required
            if (chartIndex == 1) {
                c.yAxis().setLogScale3();
            }

            // Set the labels on the x axis
            c.xAxis().setLabels(labels);

            // Add a color bar layer using the given data. Use a 1 pixel 3D border for the bars.
            c.addBarLayer3(data).setBorderColor(-1, 1);

            // Output the chart
            viewer.Chart = c;

            //include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("clickable", "",
                "title='Mileage on {xLabel}: {value} miles'");
        }
    }
}

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

//
// Create chart
//
protected void createChart(WebChartViewer viewer, int chartIndex)
{
    // The data for the chart
    double[] data = {100, 125, 260, 147, 67};
    string[] labels = {"Mon", "Tue", "Wed", "Thu", "Fri"};

    // Create a XYChart object of size 200 x 180 pixels
    XYChart c = new XYChart(200, 180);

    // Set the plot area at (30, 10) and of size 140 x 130 pixels
    c.setPlotArea(30, 10, 140, 130);

    // Ise log scale axis if required
    if (chartIndex == 1) {
        c.yAxis().setLogScale3();
    }

    // Set the labels on the x axis
    c.xAxis().setLabels(labels);

    // Add a color bar layer using the given data. Use a 1 pixel 3D border for the bars.
    c.addBarLayer3(data).setBorderColor(-1, 1);

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

    // Include tool tip for the chart
    viewer.ImageMap = c.getHTMLImageMap("", "", "title='Mileage on {xLabel}: {value} miles'");
}

//
// Page Load event handler
//
protected void Page_Load(object sender, EventArgs e)
{
    createChart(WebChartViewer0, 0);
    createChart(WebChartViewer1, 1);
}

</script>

<html>
<body>
    <chart:WebChartViewer id="WebChartViewer0" runat="server" />
    <chart:WebChartViewer id="WebChartViewer1" runat="server" />
</body>
</html>

[ASP.NET Web Forms - VB Version] NetWebCharts\VBNetASP\logaxis.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">

'
' Create chart
'
Protected Sub createChart(viewer As WebChartViewer, chartIndex As Integer)

    ' The data for the chart
    Dim data() As Double = {100, 125, 260, 147, 67}
    Dim labels() As String = {"Mon", "Tue", "Wed", "Thu", "Fri"}

    ' Create a XYChart object of size 200 x 180 pixels
    Dim c As XYChart = New XYChart(200, 180)

    ' Set the plot area at (30, 10) and of size 140 x 130 pixels
    c.setPlotArea(30, 10, 140, 130)

    ' Ise log scale axis if required
    If chartIndex = 1 Then
        c.yAxis().setLogScale3()
    End If

    ' Set the labels on the x axis
    c.xAxis().setLabels(labels)

    ' Add a color bar layer using the given data. Use a 1 pixel 3D border for the bars.
    c.addBarLayer3(data).setBorderColor(-1, 1)

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

    ' Include tool tip for the chart
    viewer.ImageMap = c.getHTMLImageMap("", "", "title='Mileage on {xLabel}: {value} miles'")

End Sub

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

    createChart(WebChartViewer0, 0)
    createChart(WebChartViewer1, 1)

End Sub

</script>

<html>
<body>
    <chart:WebChartViewer id="WebChartViewer0" runat="server" />
    <chart:WebChartViewer id="WebChartViewer1" runat="server" />
</body>
</html>

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

namespace NetMvcCharts.Controllers
{
    public class LogaxisController : Controller
    {
        //
        // Default Action
        //
        public ActionResult Index()
        {
            ViewBag.Title = "Log Scale Axis";

            // This example contains 2 charts.
            ViewBag.Viewer = new RazorChartViewer[2];
            for (int i = 0; i < ViewBag.Viewer.Length; ++i)
                createChart(ViewBag.Viewer[i] = new RazorChartViewer(HttpContext, "chart" + i), i);

            return View("~/Views/Shared/ChartView.cshtml");
        }

        //
        // Create chart
        //
        private void createChart(RazorChartViewer viewer, int chartIndex)
        {
            // The data for the chart
            double[] data = {100, 125, 260, 147, 67};
            string[] labels = {"Mon", "Tue", "Wed", "Thu", "Fri"};

            // Create a XYChart object of size 200 x 180 pixels
            XYChart c = new XYChart(200, 180);

            // Set the plot area at (30, 10) and of size 140 x 130 pixels
            c.setPlotArea(30, 10, 140, 130);

            // Ise log scale axis if required
            if (chartIndex == 1) {
                c.yAxis().setLogScale3();
            }

            // Set the labels on the x axis
            c.xAxis().setLabels(labels);

            // Add a color bar layer using the given data. Use a 1 pixel 3D border for the bars.
            c.addBarLayer3(data).setBorderColor(-1, 1);

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

            // Include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("", "", "title='Mileage on {xLabel}: {value} miles'");
        }
    }
}

[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>