[R] contour lines in windows device but neither in pdf nor in postscript

[Prof Brian Ripley]

What viewers are you using?

Works for me (using ghostscript 4.61 and acroread 8.1.2) -- I even tried 
2.7.1 (as well as R-patched).

On Fri, 1 Aug 2008, Patrizio Frederic wrote:

> library(mvtnorm)
> x     = seq(-4,4,length=201)
> xy    = expand.grid(x,x)
> sigma = (diag(c(1,1))+1)/2
> d2    = matrix(dmvnorm(xy,sigma=sigma),201)
> xsamp = rmvnorm(200,sigma=sigma)
>
> contour(x,x,d2)
> points(xsamp,col=3,pch=16)
>
> pdf("pdftry.pdf")
> contour(x,x,d2)
> points(xsamp,col=3,pch=16)
> dev.off()
>
> postscript("pstry.ps")
> contour(x,x,d2)
> points(xsamp,col=3,pch=16)
> dev.off()
>
> # I can see contour lines in a window device but I can't see them in
> files pdftry.pdf and pstry.ps
>> version
>               _
> platform       i386-pc-mingw32
> arch           i386
> os             mingw32
> system         i386, mingw32
> status
> major          2
> minor          7.1
> year           2008
> month          06
> day            23
> svn rev        45970
> language       R
> version.string R version 2.7.1 (2008-06-23)
>
> what's going wrong?
>
> Thanks in advance,
> Regards,
>
> Patrizio Frederic
>
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>

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595