how to draw graphs using arrays in windows form

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am trying to draw graph in visual basic 2010 in windows form using arrays am notable to read values.so plz help me how do i write code to draw graph.plzzz

Posted 6-Jun-12 17:13pm

Member 8953292

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Sergey Alexandrovich Kryukov 6-Jun-12 23:25pm

You need to tag "Forms". Always tag application tag or UI library to be used when it comes to UI.
--SA

2 solutions

Solution 1

You would need a third party tool that would allow you to do the plot for you.
Assuming you are using C#, you can take a look at this library available at A simple C# library for graph plotting[^].

Posted 6-Jun-12 17:19pm

Abhinav S

Comments

Sergey Alexandrovich Kryukov 6-Jun-12 23:24pm

Well, one library or another, but I never saw a perfect one... My 5.
--SA

Abhinav S 6-Jun-12 23:32pm

Thank you SA.

Yes there are a few paid ones that might be ok. But still, there always are bugs.

VJ Reddy 6-Jun-12 23:53pm

Good reference. 5!

Abhinav S 7-Jun-12 1:45am

Thanks VJ.

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VJ Reddy · Accepted Answer · 2012-06-06T17:53:00

The Zedgraph library given in this CodeProject article A flexible charting library for .NET[^] By JChampion is a very good charting library which has options to draw graphs.

A Test graph is explained in the article.

A VB Sample project is also included in the article.

Download this sample project and to test with arrays replace the CreateGraph method in this project with the following code.

VB

Private Sub CreateGraph(ByVal zgc As ZedGraphControl)
    Dim myPane As GraphPane = zgc.GraphPane

    ' Set the titles and axis labels
    myPane.Title.Text = "My Test Date Graph"
    myPane.XAxis.Title.Text = "X Value"
    myPane.YAxis.Title.Text = "My Y Axis"

    ' Make up some data points with arrays
    ' or populate the arrays from a DataSource
    Dim x As Double() = New Double() {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
    Dim y As Double() = New Double() {10, 20, 30, 50, 30, 20, 100, 60, 40, 20}

    ' Generate a blue curve with circle symbols, and "My Curve 2" in the legend
    Dim myCurve As LineItem = myPane.AddCurve("My Curve", x, y, Color.Blue, SymbolType.Circle)
    ' Make the symbols opaque by filling them with white
    myCurve.Symbol.Fill = New Fill(Color.White)
    ' Fill the axis background with a color gradient
    myPane.Chart.Fill = New Fill(Color.White, Color.LightGoldenrodYellow, 45.0F)
    ' Fill the pane background with a color gradient
    myPane.Fill = New Fill(Color.White, Color.FromArgb(220, 220, 255), 45.0F)
    ' Calculate the Axis Scale Ranges
    zgc.AxisChange()
End Sub

and run the application to test the graph drawn with arrays.