2 channel x-y plot

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• 6 Comments
• • 
  • Hi nexgen1,

    I don't understand the problem.

    simply connect one Array (that you got from first anlog input) to the

    X array, at the cluster bundle (to create a XY graph), and the same

    procedure to second Array, to the Y array, and 'walla', it works fine.

    Hope it Helps ...

    #1; Tue, 29 Apr 2008 20:59:00 GMT
• • 
  • Xref: number1.nntp.dca.giganews.com comp.lang.labview:87149

    I appreciate that you responded so quickly. Your answer makes sense,

    however, I am brand new at LabVIEW, so I don't know where to begin to

    get the x array and y array. In the end I want to plot one voltage

    from an analog input channel versus another voltage from a second

    analog input channel. I hope you can help. Thank you again for your

    time.

    --Greg

    #2; Tue, 29 Apr 2008 21:00:00 GMT
• • 
  • How are you acquiring the data and what functions are you using? If

    you acquire both channels over time, the AI function will

    automatically create a 2D array. You can use an index array function

    to get channels 1 and 2 data. Each of these should be a 1D array that

    you use for the x and y inputs to the xy graph.

    #3; Tue, 29 Apr 2008 21:01:00 GMT
• • 
  • I have a NI-DAQ and an switch. two channels (4 pins) are being used.

    The correct voltages are coming out because I am able to get the data

    to excel using the built in data logger.vi. I just really need to get

    the x and y data to plot on an x-y plot in labview while the voltages

    are being sampled. I don't know what functions are to used to be

    honest in order to acquire the two separate channels into two separate

    arrays. Thanks again.

    Sincerely,

    Greg

    #4; Tue, 29 Apr 2008 21:02:00 GMT
• • 
  • I appreciate the response once again. I will try the file you sent me

    tomorrow. Is it just the Plot XY.VI? or is it more than that? I am

    just curious.

    Thanks again,

    Greg

    #5; Tue, 29 Apr 2008 21:03:00 GMT
• • 
  • Look at the shipping example called XY Chart if you wnat to display

    data real time. The normal XY graph takes arrays post-acquisition and

    displays them but the example should do what you want without needing

    to build arrays.

    #6; Tue, 29 Apr 2008 21:04:00 GMT