R help - Feb 2006 - jpeg or tiff file formats

I have been creating some graphic postscript files using xyplot but now 
I find that I need then in either the jpeg or tiff format.  I have tried 
re-running just the lattice plot so that it is on the screen and then 
using the jpeg(filename="myplot"..... from the "bmp, jpec and png
graphics devices" documentation. It seems to create an empty file. Is it 
that this function can not work with lattice plots? Can R directly write 
a jpeg or pgn file?

-- 
Dean Sonneborn, MS
Programmer Analyst
Department of Public Health Sciences
University of California, Davis
(530) 754-9516

On Wed, 8 Feb 2006, Dean Sonneborn wrote:
> I have been creating some graphic postscript files using xyplot but now 
> I find that I need then in either the jpeg or tiff format.  I have tried 
> re-running just the lattice plot so that it is on the screen and then 
> using the jpeg(filename="myplot"..... from the "bmp, jpec
and png
> graphics devices" documentation. It seems to create an empty file. Is
it
> that this function can not work with lattice plots? Can R directly write 
> a jpeg or pgn file?
Either FAQ 7.22 or dev.off()?
> 
> 
-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no