I was wondering if it was possible to create something like this:
http://img95.imageshack.us/img95/2730/xc01wmqi0.png
in PHP, assuming the x and y values are known. I believe that this was made with perl and gnuplot, but I've never used gnuplot. If it's just a case of using gnuplot, I will read up on that, but can PHP use gnuplot? Thanks