Is there an easy way to load plots in png files into R? I'm using the png
function to create the plots from a batch job and would like to view them later.
-----Original Message-----
From: "Gavin Simpson" <gavin.simp...@ucl.ac.uk>
Sent: Saturday, July 17, 2010 6:21pm
To: "linda.s" <samrobertsm...@gmail.com>
Cc: r-help@r-project.org
Subject: Re: [R] save plot
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
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and provide commented, minimal, self-contained, reproducible code.
