[R] Artifacts in filled.contour+pdf

[Mario Valle]

Thanks David!
Indeed the printout is perfect. But this image (produced with higher 
resolution) should appear in a publication. I will ask to the author to 
check her copy of the manuscript, if it is acceptable.
Anyway, thanks for the pointer to pdf doc.
                                                                         
             mario



On 26-Oct-10 02:30, David Winsemius wrote:
> 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.
>

-- 
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