[R] Saving trellis output to files in scripts...

[Jamieson Cobleigh]

Thanks, that worked.  I see now where it says that in the help for
xyplot, however, it wasn't obvious to me before.

Jamie

On 8/9/05, Liaw, Andy <andy_liaw at merck.com> wrote:
> This is in the FAQ:  You need to wrap any trellis calls in functions or
> scripts in print().
> 
> Andy
> 
> > From: Jamieson Cobleigh
> >
> > With much help from Chuck Cleland, I was able to get xyplot to
> > generate the plot I wanted.  I'm trying to write a script (that can be
> > read using source("file")) to create the plots I want and save them to
> > files.
> >
> > If I type the following lines into the R (in interactive mode), the
> > correct plot gets saved into the file myfile.ps with a size of 4,096
> > bytes:
> >
> > ----------------------------
> > require(lattice)
> >
> > trellis.device("postscript", file="myfile.ps", color=FALSE,
> > paper="letter", horizontal=TRUE, onefile=TRUE)
> >
> > xyplot(y ~ x, type="b", data.frame(x=1:5, y=5:1))
> >
> > dev.off()
> > ----------------------------
> >
> > However, if I put the same lines into a file, "temp.txt", and type
> > source("temp.txt") into R, then myfile.ps ends up with a size of 2,332
> > bytes and shows a blank page when loaded into ghostscript.
> >
> > When run using source, it looks like the device is not getting closed
> > correctly since if I type source("temp.txt") and then dev.list() R
> > responds:  "postscript 2"
> >
> > If I type dev.off(), the file size then increases to 4,277 bytes, but
> > then the ps file is malformed.
> >
> > Anyone know how to make this work?
> >
> > Jamie
> >
> > ______________________________________________
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> > PLEASE do read the posting guide!
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> >
> >
> >
> 
> 
> 
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