Hi, everyone:
I'm a newbie to Gnuplot - been using it one week. I'm using it to plot data from the PLUTO astrophysical hydrocode (
http://plutocode.to.astro.it/ for anyone interested).
The data we can't figure out how to plot is stored in a grid as binary data. The grid is
r: 1 to 20 in 100 steps ("x")
theta: 0 to 2*PI in 100 steps ("y")
We can plot it using, for example
set pm3d map
splot "rho.0001.dbl" bin array=100x100 format="%double"
and this puts 'r' on the 'x' axis and 'theta' on the 'y' axis, but this is plotting on a rectangle, and we'd really like to have it plot as an annulus - open from 0 to 1, then data as a color map from 1-20 in r, and 0-2PI in theta.
It would also be useful to have a grid plotted over the data.
I searched for an solution before posting, but couldn't find anything beyond some clues that it'll be possible.
I'm happy to send a sample data file if that would be useful (they're about 80kb).
Thanks very much for your help,
Matt Wood, Professor
Dept Physics & Space Sciences
Florida Institute of Technology
Melbourne, FL 32901
