[R] dev.off() inside a function & other glitches

From: Michael Hopkins <michael.hopkins_at_hopkins-research.com>
Date: Tue, 01 Jul 2008 11:20:53 +0100

Hi R people

I am using a function to create a pdf device, then send a lot of plots to it in a loop then a last lattice xyplot (itself within a function) outside the loop and finally call dev.off() to write to the file. This works well apart from the fact that the last plot does not get sent to the file unless I comment out dev.off() and then apply it in the console afterwards instead:

        plot_stuff( ...); dev.off()

The device is opened like this:

        pdf( paste( var_string, ".pdf", sep="" ), onefile=TRUE, paper="a4r", width=9, height=6.5 )

Also, if I try to send two different xyplots after the loop only the last one ever gets written to the file, whether or not I apply the dev.off() trick above.

Any thoughts on why this stuff happens and best ways to avoid it are appreciated.

Other info -> R 2.7.1 on Intel Mac 10.5.3.

TIA Michael


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