Looking for a grapher

[The Holy Hand Grenade]

Hi all...

I'm looking for a program that can graph/plot equations and do basic things like find/graph derivatives. I've done a lot of searching on Sourceforge and Google, but I'm getting a lot of junk results.

I need something that is fairly feature-full, free and works on either Windows XP or Ubuntu (7.04 the 64 bit version). I'd prefer something on Ubuntu though... I set it up a few days ago and I've made the transition for the most part only going back to Windows once in a while.

Thanks

[kevinlyfellow]

Well I don't know about finding the tangents of a graph, but I've had great success using gnuplot. It really specializes in plotting data and extracting curves from it (you can graph functions as well). It works for both linux and windows. I suggest this tutorial http://www.duke.edu/~hpgavin/gnuplot.html I highly recommend this package for making nice looking plots. If you are interested in this, I further recommend using gnumeric for data entry. You can export your spreadsheet to a text file that works well for gnuplot

I can't seem to find what your looking for exactly, but...
if you have ti calculator, you can try the emulator tiemu (check synaptic for information on acquiring the roms)
or you can try computer algebra systems so that you can take the derivatives of your function. Not quite ideal for your purpose (I'm assuming) but maybe that will help.

If the computer algebra system does sound interesting, there are plenty of options. I'm most familiar with yacas, which has a front-end called proteus (i don't know what the package is called). Proteus has never worked well for me but its worth a shot. You can also try quickmath.com which uses webmathematica to take derivatives

[kevinlyfellow]

I think I found just the thing! try out kmplot

[xadder]

I really like matplotlib (pylab), since it offers very nice scripting possibilities through the python interface.

[The Holy Hand Grenade]

Hey thanks all. KMPlot suits my needs. Cheers!

[KyngeKorny]

Hi all...

I'm looking for a program that can graph/plot equations and do basic things like find/graph derivatives. I've done a lot of searching on Sourceforge and Google, but I'm getting a lot of junk results.

I need something that is fairly feature-full, free and works on either Windows XP or Ubuntu (7.04 the 64 bit version). I'd prefer something on Ubuntu though... I set it up a few days ago and I've made the transition for the most part only going back to Windows once in a while.

Thanks

GraphMonkey does all that.