gnuplot and C programming

This is a discussion on gnuplot and C programming within the C Programming forums, part of the General Programming Boards category; Hello, I want to know if it's possible to call gnuplot comands in a C program. And if it's possible ...

  1. #1
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    gnuplot and C programming

    Hello, I want to know if it's possible to call gnuplot comands in a C program. And if it's possible how can I make it?

    Thank you!

  2. #2
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    Hello again!

    Maybe I explain my problem and someone could help me. The thing is that I run a program with a lot of iterations, and in each iteration y create (modify) a file in wich I write a list of values to watch them with gnuplot. I would know if its possible to view in each iteration automatically the file. The final result will be like a video of the values of the file.

    Thanks for the help

  3. #3
    lfs addicted
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    mmm... i am not sure to have understood, but:

    can't you create the file (as usual) and execute gnuplot with system(...) ?
    from http://www.gnuplot.info/faq/faq.html...00000000000000 it seems it is possible to output the graph in image format...

    If you are developing an embedded gnuplot widget inside a window I really don't know...

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    lfs addicted
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  5. #5
    Captain Crash brewbuck's Avatar
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    You can write the data set to a file and plot it within gnuplot. Then you can use the command "replot" to reload the file and plot whatever the latest data is.

    You can also create a file of commands for gnuplot to use to control it from another program.

    If you want to DYNAMICALLY control gnuplot, you need to send it a "set terminal dumb" command and then read and write commands to it through a pipe somehow.

  6. #6
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    Dear All
    Could any one help me by telling me how can I call [pipe] gnu-plot from my c++ programming in a way that I can see the plot and update of my data in each cycle of iteration?

  7. #7
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    Zombie's are back!

    I looked at the FAQ for it, but gnuplot supports piped input, only. They list a couple alternative programs for this. Have you tried them? Was Google able to offer any hits on this?

    There must be several plotting programs out there. It's just the kind of program that makes a physicist's or engineer's, mouth water.

    And welcome to the forum!

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