[R] Scripting graph generation

[Rajarshi Guha]

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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