Cheap Software/Tools for Plotting Cartesian Graphs

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Discussion Overview

The discussion focuses on finding affordable or free software and online tools for plotting Cartesian graphs, specifically for 2D functions. Participants express their needs for features such as selecting ranges for x and y, plotting multiple functions simultaneously, and handling complex functions without non-elementary components.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant inquires about free or inexpensive tools for plotting Cartesian graphs with specific functionalities.
  • Another participant suggests Gnuplot as a suitable option, citing its long-standing use and availability of documentation.
  • A third participant expresses agreement with the recommendation of Gnuplot.
  • A later reply mentions difficulties encountered while using Gnuplot, particularly with plotting certain equations and seeks advice on resolving these issues.
  • Desmos.com is recommended by another participant, though they note it may not be suitable for creating publishable images.
  • Geogebra is also mentioned as a free option, with the caveat that it requires Java to function properly.

Areas of Agreement / Disagreement

Participants generally agree on the usefulness of Gnuplot, but there are differing experiences regarding its functionality. There is no consensus on the best tool, as multiple options are presented, each with its own strengths and limitations.

Contextual Notes

Some participants express specific needs that may not be fully addressed by the suggested tools, such as the ability to plot certain types of equations or create publishable images.

Big-Daddy
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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
 
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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/
 
+1 for gnuplot.
 
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?
 
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.
 
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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