I don't see why you think it is 'odd'. par() is working with the current
working copy of the internal pars, and that is only updated when you plot.
It refers to the current state of the device.
At least if the display list is turned on, a screen device will replot
when it is resized, obviously if there is a plot present.
If you are trying to do computations for a plot, call plot.new() first.
On Fri, 18 Jul 2008, Sarah Goslee wrote:
Hello,
I was messing around with graphics, and noted an odd behavior of par("din"). If
the x11 device is empty, par("din") does not return the correct size
if the device
has been resized manually. dev.size() works correctly.
R version 2.7.1; Fedora 8
# case 1 - empty device
x11()
dev.size()
[1] 6.995263 6.994187
par("din")
[1] 6.995263 6.994187
# resize device
dev.size()
[1] 6.995263 3.401667
par("din")
[1] 6.995263 6.994187
dev.off()
# case 2, device containing a plot
x11()
plot(1,1)
dev.size()
[1] 6.995263 6.994187
par("din")
[1] 6.995263 6.994187
# resize device
dev.size()
[1] 6.995263 2.772976
par("din")
[1] 6.995263 2.772976
dev.off()
I found some discussion of this from 2000 and 2001, but no explanation or
resolution, and I'm curious. Is there a reason for this behavior?
Thanks,
Sarah
--
Sarah Goslee
http://www.functionaldiversity.org
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--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
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