On Oct 25, 2010, at 6:50 AM, Mario Valle wrote:
Dear all,
I'm using R 2.12.0 on Windows 7 (32bits)
I created a filled contour from the attached data using the
following code:
load('bug.RData')
pdf('bug.pdf', width=14, height=7)
filled.contour(o4$x, o4$y, o4$z, color=rainbow, xlim=c(4,18),
ylim=c(0,35), zlim=c(14,36))
dev.off()
If you look (I used acrobat reader 9.4) at the attached bug.pdf, you
see an incomplete grid of gray lines.
From the pdf help page:
"Note
If you see problems with PDF output, do remember that the problem is
much more likely to be in your viewer than in R. Try another viewer if
possible. Symptoms for which the viewer has been at fault are apparent
grids on image plots (turn off graphics anti-aliasing in your viewer
if you) and missing or incorrect glyphs in text (viewers silently
doing font substitution).
Unfortunately the default viewers on most Linux and Mac OS X systems
have these problems, and no obvious way to turn off graphics anti-
aliasing. "
Are they there when printed?
On a Mac I can make the lines in that pdf graphic "appear and
disappear" in different places on my screen by changing the "Page
Display" settings for Resolution in Acrobat Reader, and viewing in
other applications like GraphicConverter I see even more lines tha I
do in Acrobat Reader.
--
David.
This artifact is not present if the output is PNG (attached,
obtained in the above code using png('bug.png', width=800,
height=400) instead of pdf()).
Seems like a off-by-one bug. Is it a known bug? Is there any
workaround? I tried lattice::contourplot but it does not support NA.
Thanks for your help!
mario
--
Ing. Mario Valle
Data Analysis and Visualization Group | http://www.cscs.ch/~mvalle
Swiss National Supercomputing Centre (CSCS) | Tel: +41 (91)
610.82.60
v. Cantonale Galleria 2, 6928 Manno, Switzerland | Fax: +41 (91)
610.82.82
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
