[R] Saving plot into file

Yves Moisan ymoisan at groupesm.com
Fri Aug 31 15:33:27 CEST 2007

uv wrote:
> Hello. I am using R with Mac X11. I am looping through a few hundreds of
> text lines, making a plot() for each of them. I would like to save these
> plots graphical images into separate graphical files and I didn't succeed
> doing that. I would be grateful for any suggestion.

Use jpeg or similar functions that redirect graphical output to file, e.g.

jpeg(filename = "plot.jpg", width = 800, height = 800,pointsize = 12,
quality = 100, bg = "white")

As mentioned in ?jpeg : "A plot device is opened: nothing is returned to the
R interpreter" so you'll see nothing happening except your next graphics
command will be written to the file.

dev.off() restores the normal R-graphics device.  I usually set the working
directory before redirecting the ouput to a file e.g.
setwd("C:/dir/subdir").  That's useful when you have many plots to generate
and want them stored in different places on your filesystem.


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