R help - Apr 2007 - Scripting graph generation

Hi,

I'm looking to automate the generation of some graphs in R.  I can't
seem to
figure out how to script R, and change the output device of hist() or plot()
to create a .gif or .png file.  This seems like something that is probably
really simple, and I've just overlooked the call do do it.  Can anyone point
me in the right direction, or maybe send a sample script?

thanks,
--Mike Huber

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On Wed, 2007-04-25 at 13:21 -0400, Mike Huber wrote:
> Hi,
> 
> I'm looking to automate the generation of some graphs in R.  I
can't seem to
> figure out how to script R, and change the output device of hist() or
plot()
> to create a .gif or .png file.  This seems like something that is probably
> really simple, and I've just overlooked the call do do it.  Can anyone
point
> me in the right direction, or maybe send a sample script?
To plot multiple PNG files

m <- matrix(runif(100*10), nrow=10)
png(filename = 'plot%03d.png')
for (i in 1:nrow(m)) {
  plot(m[i,])
}
dev.off()

To plot multiple graphs as individual pages of a PDF file

m <- matrix(runif(100*10), nrow=10)
pdf(file = 'plot.pdf')
for (i in 1:nrow(m)) {
  plot(m[i,])
}
dev.off()

HTH,

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Rajarshi Guha <rguha at indiana.edu>
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