printing from treillis.device - R-help

Mon, Jun 25, 2001 8:53 AM #

Hi,
I was using xyplot 
and had problems in printing (on a postscript file)
when there was 
a session
like 
xyplot(....)
par(new=T)
xyplot(....)

after a print the result is that the ps contains only he last
xyplot!
any obvious things to do?
thanks
Didier

Didier G. Leibovici    didier at fmrib.ox.ac.uk    +44 (0)1865 222 739
Image Analysis Group                          fax:+44 (0)1865 222 717
Oxford University, Centre For Functional Magnetic Resonance Imaging of
the Brain (FMRIB), John Radcliffe Hospital, Headington, Oxford OX3 9DU,
U.K
http://www.fmrib.ox.ac.uk/~didier/
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Peter Malewski

Mon, Jun 25, 2001 10:19 AM #

On Mon, Jun 25, 2001 at 04:53:17PM +0100, Didier Leibovici wrote:

According to Prof.Ripley it isn't a good idea to copy a trellis.device
to another device (eg printer). See the posting at the r-help
archive.

If you really want that you can

xyplot(...,page=function(i)dev.print(...,file=paste("/tmp/tmp",i,".ps",sep="")))

see ?trellis.args.

btw: Lattice is under development.

Peter

P.Malewski, Limmerstr.47, 30451 Hannover, 0511-2135008
At work: http://www.MH-Hannover.de 0511 532 3194 / Fax: 0511 532 3190, 
P.Malewski at tu-bs.de, peter.malewski at gmx.de, malewski.peter at mh-hannover.de.
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Brian Ripley

Mon, Jun 25, 2001 10:30 AM #

On Mon, 25 Jun 2001, Peter Malewski wrote:

(Yes, but he is plotting on a postscript device).

I think Didier's probelm is mixing GRZ-style and trellis-style graphics.
That is, par(new=T) does not do what he wants.

If you want to print a Trellis plot (that is what you do), and then add
another you need to use the `more' argument to print.trellis.

That is

print(xyplot(....), more=T)
xyplot(....)

works in the original, and looks like it should work in lattice too.

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 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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