Thanks, I guess my problem is that I am using the latex prosper package to make presentation slides but I cannot compile prosper documents with pdflatex (see here).  Sorry, I see that this is not a matplotlib specific question so I will try to find a solution somewhere else.

On Mon, Aug 31, 2009 at 12:10 PM, John Hunter <jdh2358@gmail.com> wrote:
On Mon, Aug 31, 2009 at 1:04 PM, Chuck Pepe-Ranney<cpepera@mines.edu> wrote:
> Does anybody have a good method for preserving quality and transparancy of
> eps images when going from matplotlib to latex to pdf?  I can only preserve
> the transparency if I save as png and then convert to eps but then I lose
> quality.  If I save as eps directly, all my patches are opaque despite the
> alpha values.

The postscript format does not support transparency.  This is not a
matplotlib limitation but a postscript limitation.  The best solution
is to save your matplotlib figures as pdf, which is also a vector
format but which does support transparency, and then use pdflatex

JDH



--
Chuck Pepe-Ranney
Spear Lab
Colorado School of Mines
Work: (303)384-2477
Cell: (575)313-0993