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Re: [ferret_users] spurious ripples in ps shade plot

Thanks to Ryo Furue, Pierre St-Laurent, Andrew Wittenberg and Jaison. My problem with spurious lines and ripples in a shade plot was not coming from the conversion step done by Fprint (gksm2ps), but from subsequent conversions. I work on a mac, and hadn't quite focussed on the obvious fact that I ordinarily print ps from preview -- which converts to pdf. Turning off anti-aliasing of text and line art (in preview, this is under preferences/pdf) solved my problem. My ps2eps conversion utility was also introducing this problem, so I saw spurious ripples even when including encapsulated ps in latex compilations. Perhaps I could also ferret out a solution with an appropriate command line option to ps2eps, but I have a second conversion utility, ps2epsi, which did a clean conversion.


On Feb 10, 2008, at 12:05 AM, Ryo Furue wrote:

Hi Matthew and Andrew,

| The PostScript itself may be ok -- it may be your PostScript
| viewer (gv?) [. . .]

This explanation agrees with my experience, too.  In the past,
I sent to journals, plots that looked just like yours in
a PostScript viewer.  They were all printed perfectly well
in the final published papers.  So, I recommend that you tell
your graphics specialist to print out your PostScript files
from her/his local printer to see if those white lines appear
in printouts.  If the ultimate use of the files are for
printouts, this should be a good test.


On Feb 8, 2008, at 5:44 PM, Matthew Hecht wrote:
I've been attempting to produce a shade plot which will satisfy a journal's graphics specialist. The plot looks great on-screen, but when I use Fprint to convert to postscript it acquires spurious lines, and spurious ripples in regions that should be of uniform color, as in the attached panel. I've seen an email exchange from Nov 2005 suggesting use of gif output, with as much resolution as you can get, as a work-around. I've done this, panel-by-panel, then pasting the gif panels together to maintain resolution. Has anyone found a better solution to producing publication-quality output of shade plots?

thanks for any suggestions! --Matthew

Matthew Hecht
email: mhecht@xxxxxxxx                   http://public.lanl.gov/mhecht
mail : MS B296, Los Alamos National Lab,       http://climate.lanl.gov
       Los Alamos, NM 87545                        phone: 505-667-5798

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