how to specify dev.print target by a variable?

G'day Leif,

"LK" == Leif Kirschenbaum <leif at reflectivity.com> writes:

LK> How do I do this such that I can specify FOO to be one of
    LK> several choices? (GDD, PNG, postscript, etc.)  If I make FOO a
    LK> character variable, then "dev.print" complains.
Mmh, I am not sure what the complaint of R 2.2.0 on MS Windows is, but
I guess it is the same as under linux:

DEVw=500
DEVh=350
fname="my_plot"
plot(rnorm(300))
FOO <- "png"
dev.print(file=fname, device=FOO, width=DEVw, height=DEVh, bg="transparent")

Error in dev.copy(device = "png", file = fname, width = DEVw, height = DEVh,  : 
	'device' should be a function

Which is very informative.  `device' is supposed to be a function, not
a character variable, thus:

FOO <- png
dev.print(file=fname, device=FOO, width=DEVw, height=DEVh, bg="transparent")

X11 
  2

FOO <- pdf
dev.print(file=fname, device=FOO, width=DEVw, height=DEVh, bg="transparent")

X11 
  2 

all seem to work.

HTH.

Cheers,

        Berwin

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