[R] Windows: Graphics appear only partially

[Philippe Grosjean]

On Thu, 24 Apr 2003, Alexander Ploner wrote:

> 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?

Brian Ripley wrote:
>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

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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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