ChartDirector 7.1 (.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\CSharpWPFCharts\logaxis.cs
using System; using ChartDirector; namespace CSharpWPFCharts { 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.SVG); // 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> <head> <script type="text/javascript" src="cdjcv.js"></script> </head> <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.SVG) ' 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> <head> <script type="text/javascript" src="cdjcv.js"></script> </head> <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.SVG); // 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> <style> @ViewBag.Style </style> @Scripts.Render("~/Scripts/cdjcv.js") </head> <body style="margin:5px 0px 0px 5px"> <div style="font:bold 18pt verdana;"> @ViewBag.Title </div> <hr style="border:solid 1px #000080; background:#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>