[R] trouble in setting jpeg a large size
Prof Brian Ripley
ripley at stats.ox.ac.uk
Wed Nov 12 06:26:37 CET 2003
What exactly do you not understand about this? Almost certainly Windows
refused to create a 480x65526 bitmap, and it looks as if dimensions of
bitmaps are limited to 2^15-1.
The mind boggles as to what you actually wanted to do with such a wierd
aspect ratio. For a more normal aspect ratio you will run out of memory:
for example a 10000 pixel square bitmap is 380Mb and you will need at
least 2 copies. My 512Mb system failed to create that.
Have you tried bitmap()?
On Wed, 12 Nov 2003, liuqi wrote:
> I met a trouble in setting jpeg a large size. for example, when i use
> jpeg(height=65526), a problem "Error in devga(paste("jpeg:", quality, ":", filename, sep = ""), width, :
> unable to start device devga In addition: Warning message: Unable to allocate bitmap" occurs.
> if a smaller size is set, no errors occur.
> I'm using R 1.8.0 on win2k.
> Thank you for your help!
> Liu Qi
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 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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