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2 channel x-y plot

On Programmer » LabVIEW

2,128 words with 6 Comments; publish: Tue, 29 Apr 2008 20:58:00 GMT; (200109.38, « »)

I am using LabVIEW 6.1. Does anyone have a program that produces an

x-y plot which plots 1 analog input channel versus a second analog

input channel?

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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