[pstricks] contour

[cyrille Piatecki]

Thanks for your answer but before your intervention I have a graph and 
now nothing due to a postscript error.

Secondly, I would like tu use massively contour plot for a book and it 
would be nice if I can have a contour sty because I dont understand the 
options --- can I change easely the colors.... --- and I dont know how 
to take the code out of the exemple.

I am very ... in postscript but I learn little by little.

Thanks for all

Cyrille Piatecki