Re: ps and eps not good!

[<br...@ph...>]

Arnaldo Gammal wrote:
> Dear Sirs,
> 
> I departed from data points and generated densitys plots using gnuplot.

How exactly did you generate them, using which version of gnuplot?

> I could well see the picture in the screen. However when I generate the
> eps file it happens that where I have constant density there are extra
> crossing "lines" in the generated eps file. Why is this happenning?  

I'll venture a guess: the lines will go away once you turn off 
antialiasing ('graphics alpha' in the "Media" settings) in your 
GhostScript viewer.  There's a known problem with the interaction of 
some versions of gnuplot, some versions of ghostscript and their 
antialiasing.  This usually shows up as strange patterns in the color 
bar, and "hair fractures" in pm3d map plots, which change position and 
occurence as you zoom in and out.  In a nutshell, it's an aliasing 
artifact brought out by the antialiasing / alpha-blending machinery.