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Simple loop script in Gnu Plot

  1. Jan 18, 2008 #1
    Simple loop script in "Gnu Plot"

    Ok, I have "n" data files containing coordinates on the form of (x,y) called:


    What I want is to program a simple script in gnu plot(Linux) which load them and convert
    them into *.gif files called:


    I have already written a script that can convert ONE data file into ONE gif file, it looks like this:

    $ nano plot
    Code (Text):

    set terminal gif
    set output 'koor.gif '
    plot 'koor.dat' with lines
    It loads the file called koor.dat and convert it into koor.gif - simple :P

    SO; How do I make this script loop ?

    Last edited by a moderator: Jan 18, 2008
  2. jcsd
  3. Jan 18, 2008 #2

    D H

    User Avatar
    Staff Emeritus
    Science Advisor

    Gnuplot can't do what you want. You have to do the looping by hand (the hard way) OR use a scripting language that has the requisite capabilities (the easy way). Write a perl script (or Python script, or whatever) that generates the gnuplot script, and then invoke that gnuplot script.
  4. Jan 18, 2008 #3
    hmm so what you suggest is that I write a script that generates a plot script looking like:

    set terminal gif
    set output '1.gif '
    plot '1.dat' with lines,

    then initiating 'gnuplot plot'.
    Thereafter my python script shall rewrite the the plot script into:

    set terminal gif
    set output '2.gif '
    plot '2.dat' with lines

    and so on..!?
  5. Jan 18, 2008 #4
    I guess this is a quite slow process..
    Are there libraries in C which are capable of plotting and converting into *.gif
    I only know a bit of C programming but it should be sufficient..
  6. Mar 5, 2009 #5
    Re: Simple loop script in "Gnu Plot"

    please can anyone help me to plot with colors in G N U P L O T
    Version 4.0 patchlevel 0, as I found some commands somewhere online, but it does not work, can you plaes show me how to do it, and how to add legends.....
  7. Mar 23, 2010 #6
    Re: Simple loop script in "Gnu Plot"

    So, this is horribly outdated, but if someone else stumbles by here with the same question...here's the answer. You can do this, using a combination of an external script and the reread command.
    You should be able to do something similar to the following...

    #file gnuscript.gp
    load "loadfile.gp"
    #end of gnuscript.gp

    #file loadfile.gp
    set output sprintf("file.%d.gif",iter)
    splot sprintf("file.%d.dat",iter) w lines
    if(iter<=n) reread
    #end of loadfile.gp
  8. Aug 15, 2010 #7
    Re: Simple loop script in "Gnu Plot"

    It is possible to use:

    plot for [i=1:10] ...

    see the documentation!
  9. Aug 15, 2010 #8
    Re: Simple loop script in "Gnu Plot"

    mersecske's solution will work (much more elegantly than my previous solution)...

    The only caveat is that it requires at least gnuplot version 4.3. If you try mersecske's solution and it doesn't work, check your version.
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