Gnuplot is by far the best plotting solution that's open source and free at the same time.
There is a great support channel on irc.freenode.net #gnuplot aswell.
Anybody here familiar with Sigma-Plot? I'm kind of shopping around for a cheap all around graphing, plotting, computing, type of software that allows me to write math and text simultaneously. Any one got any suggestions. Or, better yet, free downloads?
SourceForge.net: gnuplot development: Files
That should be the correct repository.
If you're running Windows then gp425win32.zip is the one to get.
After installing/unzipping you'll find the executables in the /bin directory. To plot a function you can try something like 'plot sin(x)' in the 'gnuplot>' command line.
Run pgnuplot.exe from the /bin directory to run commands.
You might need this: http://www.microsoft.com/downloads/d...displaylang=en
to read help files in Vista/Windows 7. Commands can be looked up by typing 'help' in the command line, or 'help command' to get help on a specific command, try 'help plot'. The files wgnuplplot.exe and wgnuplot-pipes are for piping sdin in Windows. I'm not sure how this works as I'm a GNU/Linux user myself, but pgnuplot.exe should have everything you need.