plotting 2 different 1 dimensional arrays versus each other

sanderson · January 15th, 2009, 05:35 PM

I have two one dimentional arrays I want to plot versus each other. Its just a basic x versus y plot. I have been trying to use mschart in vb 2008 but I have been unsuccessful. Can someone tell me how to create a simple x y plot on a form using the date stored in two arrays?

Patrick Cambria · February 7th, 2009, 04:21 AM

Quote:

Originally Posted by sanderson

I have two one dimentional arrays I want to plot versus each other. Its just a basic x versus y plot. I have been trying to use mschart in vb 2008 but I have been unsuccessful. Can someone tell me how to create a simple x y plot on a form using the date stored in two arrays?

Your request doesn't give much useful information.

Two arrays of what? You meantioned "date stored" but I think that was a typo for "data stored".

Then you meantion plotting x,y which is a single point so I assume that one array holds many x vaules and the other holds many y values. If this is try why dont you use a Point Structure and store the full x,y points in one array?

Are you asking for help looping through an array? Or are you asking for help with the MSChart control or are you asking for help useing the & operator to join multi values such as a value from each array?

You need to clearly specify what you want to accomplish, what you already know, and where your stuck before anyone can actually help you.

I assume this will help somewhat.

Code:

    Public Structure POINT
        Public X As Integer
        Public Y As Integer

        Public Sub New(ByVal X As Integer, ByVal Y As Integer)
            Me.X = X
            Me.Y = Y
        End Sub
    End Structure

sanderson · February 12th, 2009, 07:33 PM

Okay I will try to explain better this time. I have a temperature controller that is sending temperature values to my computer. As the temperature changes with time I want to plot a graph of the temperature versus time.

So if on a form I pressed a button I would want to take the temperature values I am reading in from the temperature controller and plot them versus the time such that by pressing the button time is 0 then 1 sec, 2 sec, 3 sec, 4 sec... and an example temp might be that a 1 sec the temp value is 25 degrees then 2 sec its 23 degees and at 3 sec its 20 degrees....

Does this make sense? How would I go about doing this?
Sorrt I was so unclear... hopefully this is better.

gbianchi · February 13th, 2009, 08:00 AM

Hi there..

Well. You will need a timer object that starts when you press the buttom. If you want to draw on your form, you will need objects like pen. Your first problem is the size of the drawing. Could be very tricky to make it always fit your form, you will have to plot all the points every second.

You need help with the drawing part?