On Sat, 2010-07-17 at 14:52 -0400, linda.s wrote:
> > Open a new device before plotting, do your plotting, close the device.
> >
> > For example, using a PDF device via pdf():
> >
> > pdf("my_plots.pdf", height = 8, width = 8, pointsize = 10,
> > version = "1.4", onefile = TRUE)
> > for(i in 1:10) {
> > y <- rnorm(100)
> > x <- rnorm(100)
> > plot(y ~ x)
> > }
> > dev.off()
> >
> > The last line (dev.off() is very important as the file will not be valid
> > pdf without closing the device.
> >
> > HTH
> >
> > G
>
> I got the error:
> > pdf("my_plots.pdf", height = 8, width = 8, pointsize = 10,
> + version = "1.4", onefile = TRUE)
> > for(i in 1:10) {
> + y <- rnorm(100)
> + x <- rnorm(100)
> + plot(y ~ x)
> + }
> > dev.off()
> null device
> 1
If by "error" you mean "null device \n 1", that is a notice informing
you what the now current plotting device is, i.e. in this cases there
isn't one.
Did you look in your current working directory (see what that is by
using getwd() ) for a pdf named "my_plots.pdf"?
G
--
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Dr. Gavin Simpson [t] +44 (0)20 7679 0522
ECRC, UCL Geography, [f] +44 (0)20 7679 0565
Pearson Building, [e] gavin.simpsonATNOSPAMucl.ac.uk
Gower Street, London [w] http://www.ucl.ac.uk/~ucfagls/
UK. WC1E 6BT. [w] http://www.freshwaters.org.uk
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