Re: [Plplot-general] PS Driver for Image Plots

[Andrew R. <and...@us...>]

On Tue, Nov 16, 2004 at 11:20:03PM -0800, Alan Irwin wrote:
> On 2004-11-16 22:23-0700 Curtis Cooper wrote:
> 
> >>>2) Image plots using the postscript driver come out with streaks across
> >>>the image, as can be seen by running example x16c and saving to a
> >>>postscript driver (either ps or psc).
> >>
> >>What platform and what version of PLplot?  I have never seen such problems
> >>with example 16 on Linux.
> >>
> >
> >This happens in both Debian and Mandrake Linux for the Pentium 4.
> >Using PLplot v. 5.3.1 compiled from the source code tarball on the
> >website.
> 
> Several of our Developers (including me) use Debian testing so that distro
> (and probably Mandrake as well) should be okay for you.  However, now I have
> thought about what you have said some more, I realize my comment above has
> an important qualifier which I failed to state.  Antialiasing must be off in
> the postscript viewer (e.g., gv) to get good looking plots on the screen. Is
> that the problem you refer to here? Try turning antialiasing off in the
> postscript viewer to see whether the problem you are referring to goes away.

I've observed this as a rendering issue with the viewer rather than a
plplot problem. Reloading or refreshing the view (by pressing `a' in gv)
usually fixes it for me. I have seen similar problems with plots from
gnuplot and fixed them the same way. In my experience antialiasing makes
no difference to this issue of lines across the plot.

Andrew