Graphics-Device-Size vs. Window-Size

I want to layout on screen a graphic bigger than the screen (width=16.53543,
height=11.69291) but strwidth() and strheight() give wrong results.

x11(width=42/2.54, height=29.7/2.54, pointsize=12)
plot(1,1, type="n", xlim=c(0, 1), ylim=c(-1, 0), xlab="", ylab="",

axes=FALSE)

strwidth("Whatever")

[1] 0.08471151

# Now resize the window and repeat
strwidth("Whatever")

[1] 0.1856643

strwidth() obviously tells me how much space a text needs ON THE SCREEN, not
on the desired device size. Can someone enlighten what is the best way to
solve this?

Regards


Jens Oehlschl?gel

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