[solved] 2D data plotter [former Request]

Darillian · n00b Joined: 25 Jun 2007 Posts: 13

Hey guys,

first of all, I want to say thanks for all those fancy tips and tweaks here, I've never encountered such a mass of useful posts in one board!

Well, let's hope, you guys can help me with my request as well:
I'm looking for a simple 2D data plotter for some, in my case, physical results. It should work a bit like the OOo-Calc-chart-thing, so that you feed it with some data and it plots you a curve out of it. In addition, some function display would be nice, so that you can e.g. feed it with some data from your experiment, it plots you the curve as mentioned before and then it says something like "plotted curve 1 / (0,873 * r), suggesting 1/r"
I hope you've got me

Greetz
Darillian

barophobia · Posted: Mon Jun 25, 2007 10:38 pm Post subject:

Don't know if this is overkill for your uses but Octave, a Matlab clone will do trick.

Another package you might look into is R. You can generate some crazy looking graphs with that program, just look at http://addictedtor.free.fr/graphiques/

R is most likely overkill for just simple scatter plotting though, so I go with Octave.

mark_alec · Posted: Tue Jun 26, 2007 7:31 am Post subject:

Moved from Unsupported Software to Other Things Gentoo as there is nothing unsupported about requesting a program type.

http://www.gnuplot.info/
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erikm · l33t Joined: 08 Feb 2005 Posts: 634

I personally use Gnuplot a lot. Otherwise, try (they're all in portage) Grace, Labplot and Qtiplot. Qtiplot is supposedly an Origin clone, which might help if you're an Origin user.

RobertDavid · Posted: Tue Jun 26, 2007 9:31 am Post subject:

I dont know how your data looks like but some time ago I made a script for me to display charging curve from my battery charger. It sends me data in this form xxx:xxx:xxx:xxx:xxx:xxx so I have changed the ":" in " " and load that to octave as matrix, where you can do anything you want. Plot colums of matrix etc.. If you want to find a closest line that intersect the data, you can easyly make function for "Smallest Square Method", or I hope there is allready programed one (dont know). .

Here are the scripts:
robertek.no-ip.org/files/nabijec/*

where "*" is bat-load, bat-show, bat-print, script, script-print
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Darillian · n00b Joined: 25 Jun 2007 Posts: 13

Thanks a lot for the gnuplot-link, it really affords what I need!

I'll dump some links here for those guys who have similar requests:

Really simple and straightforward tutorial for plotting data and fitting it to functions
Overall tutorial on gnuplot provided by IBM, good to get familiar with the plot syntax and additional options, like labeling the outcome axes
not so FAQ, a fancy list full of tweaks for the plot outcome (e.g. "I want to connect all points with some smooth curves")

So thanks again to you guys, triple thumbs up! :lol:

Greetz
Darillian