[R] save plot

[dbandler at bandlerconsulting.com]

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.simpson at ucl.ac.uk>
Sent: Saturday, July 17, 2010 6:21pm
To: "linda.s" <samrobertsmith at gmail.com>
Cc: r-help at 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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