On Tue, 13 May 2008, Karl Ove Hufthammer wrote:
Prof Brian Ripley:
matrices, especially given that X11 redraws the plot whenever its window
is covered/uncovered by another window, or when I switch virtual
desktops.
That is a function of your X setup. R does ask for backing store to be
used, and so it seeems your setup is not doing so.
I believe this is a common problem. I have observed it on all systems and R
versions I've used.
Well, I've observed it with some window mangers in F8, but I've also seen
other systems where a backing store was used.
On my Fedora 8 system with R 2.7.0 Patched, the following causes complete
repainting every time you I slightly move a window in front of the graphics
window:
X11(type="Xlib"); n=10^5; plot(rnorm(n),rnorm(n))
Using cairo, the backing pixmap is used (but cairo is extremely slow in
plotting 10^5 points, so that doesn't help much :-/ ).
It does if you use a more suitable plot of 10^5 points.
--
Karl Ove Hufthammer
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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)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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