[R] Shutting down a trellis plot (was R-help Digest, Vol 30, Issue 26)

[Prof Brian Ripley]

I suspect you have not print()-ed your graphics, see FAQ Q7.22.

It is then possible to include dev.off() within the function.  E.g.

testit <- function(fn = "test.eps")
{
   trellis.device(postscript, file=fn, onefile = FALSE, horizontal=FALSE)
   print(stripplot(voice.part ~ jitter(height), data = singer, aspect = 1,
                   jitter = TRUE, xlab = "Height (inches)"))
   dev.off()
}

testit()

works for me.


On Fri, 26 Aug 2005, Jean-Marc Ottorini wrote:

>   For me ( i.e. R 2.1.1 on Mac OS X), using  "trellis.device
> (postscript, onefile = F, etc ..."  with the lattice library within a R
> function works fine to obtain the desired graph as an EPS file ,
> provided that :
>
>    1) the command dev.off() is not included in this function
>
>    2) and it is  issued at the  command level after the function has
> been exited
>
> I would like to know if there is a way to close the EPS file within the
> function itself, freeing the user to issue the closing command (I
> already  tried trellis.device (), and trellis.device (null) without any
> success).


-- 
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)
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