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Software for graphing

  1. Apr 12, 2014 #1
    Does anyone know any cheap (preferably free) software or online tools for plotting reasonably complicated Cartesian graphs? I would like the functionality to 1) be able to select the range of x and y over which to view the graph, 2) be able to plot multiple functions on the same graph and 3) plot quite long functions of x and y (though they will not contain anything non-elementary). 2D only needed
     
  2. jcsd
  3. Apr 12, 2014 #2

    Filip Larsen

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    Gold Member

    Gnuplot [1] may fit your bill and has been around for a long time (I used it for my papers and thesis ages ago).

    [1] http://www.gnuplot.info/
     
  4. Apr 12, 2014 #3

    Borek

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    Staff: Mentor

    +1 for gnuplot.
     
  5. Apr 12, 2014 #4
    Thanks for the recommendation. It seems to work for most things and there's loads of documentation but I haven't been able to get this online trial to plot my y-scale too? e.g. http://toycompute.net/?p=1 it's fine when I try code " plot x**2 " but, say, " plot x**2+y**2=6 " and it just plots y=x^2 again, rather than x^2+y^2=6. I couldn't find any example plots using full f(x,y) functions either. Any idea how to deal with this?
     
  6. Apr 12, 2014 #5
    desmos.com is pretty good as long as you have a good connection to the internet.

    edit: If you are looking to make images to publish, this will not do.
     
  7. Apr 13, 2014 #6
    Geogebra

    You should go on google and search for Geogebra. It is free, but you need to have jave on your computer, so that you can use Geogebra smoothly.
     
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