Watch this Author's files
This is the best piece of matlab/latex code I have ever seen!!.
I manage to solve it. Apparently my windows version of pdftex does not support the font I was using in the rest of the document.
I am trying with a Contour plot.(pdflatex + pstool) Everything looks perfect except for the contour numbers. They don’t appear in the pdf files (actually the number tags are there in the eps). Does it happened to somebody else ?.