From: Prof Brian D Ripley (firstname.lastname@example.org)
Date: Mon 18 Feb 2002 - 04:59:13 EST
On 17 Feb 2002, Peter Dalgaard BSA wrote:
> Peter Dalgaard BSA <email@example.com> writes:
> > > Works well for me (R-1.4.1, WinNT4; your version / OS?).
> > > You didn't specify a background color with par(bg=...) before?
> > I see it on Linux, although my R versions are slightly old on this
> > particular machine. I'll rebuild the development version and see if it
> > disappeared, but I don't think we touched this since 1.4.0?
> Still there. Minimal reproducing example is
> and then look at the Rplot.png with ee or whatever. Doesn't change
> anything to use bg="whatever" on the dev.copy call, so the problem
> would seem to lie in the extraction of the parameter from the X11
auk% identify -verbose Rplot.png
0: ( 0, 0, 0) #000000 black
1: (254,254,254) #fefefe ~white
runlength packets: 2590 of 230400
The issue is the X11 device has by default a transparent background (coded
by #fefefe internally), so copying it by dev.copy is *not* a good idea.
par(bg = "white")
will do what you intended. I don't see why you are getting a light green,
I don't know why this is not producing transparent png's: it did once do so
but there were extensive driver changes just before the release of 1.4.0.
I probably need to fix those ....
-- Brian D. Ripley, firstname.lastname@example.org Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595
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