Windows: Graphics appear only partially

we have installed R in one of our computer labs. Running demo(grpahics)
works, kindof, in that it produces all the usual plots without crashing,

but

the plots are incomplete: no color wheel, no pie chart, no boxplots, just
some labelling, titles, and in rare cases, axes. We have tried this with
both 1.7 and 1.6.2, with the same results. The computers are running

Windows

2000, with somewhat elderly video cards (NVidia Vanta with 8 mb of video
RAM), the monitor is set to 1024x768 and "true colors" (32 bit).

Has anyone suggestions why this might be? What might be done?

I've no real idea: I used to run R happily on a W2k laptop with only 2.5Mb
of video memory (1024x768, 24bit).  Looks like a graphics driver problem to
me: can you try 24bit or failing that 16bit?

... or even safest: try to switch to the standard VGA driver if your graphic
cards allows it (supporting maximum resolution of 800x600). This way, you
will know if it is the graphic driver that causes the trouble. Then, if
answer is yes, three possibilities:
1) Look at NVidia web site if they propose a more recent driver that perhaps
corrects these bugs,
2) Go to control panel -> display -> settings -> advanced -> troubleshoot,
and move the slider to the left (hardware acceleration: none). If it works,
try sliding a little bit to the right and recheck R graphs, etc... until you
find the best compromise between hardware accelaration level and correct
graph display in R,
3) Change the graphic card as a last solution if everything fails :-(

Best,

Philippe Grosjean

...........]<(({?<...............<?}))><...............................
 ) ) ) ) )
( ( ( ( (       Dr. Philippe Grosjean
 ) ) ) ) )
( ( ( ( (       LOV, UMR 7093
 ) ) ) ) )      Station Zoologique
( ( ( ( (       Observatoire Oceanologique
 ) ) ) ) )      BP 28
( ( ( ( (       06234 Villefranche sur mer cedex
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( ( ( ( (
 ) ) ) ) )      tel: +33.4.93.76.38.18, fax: +33.4.93.76.38.34
( ( ( ( (
 ) ) ) ) )      e-mail: phgrosjean at sciviews.org
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 ) ) ) ) )
.......................................................................



--
Brian D. Ripley,                  ripley at stats.ox.ac.uk
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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