Memory management on Windows (was Size of jpegs/pngs)
I think this an issue about the amount of graphics memory. You are asking for an image of about 17*2*3 = 102Mb, and you need more than that.
From the help page:
Windows imposes limits on the size of bitmaps: these are not
documented in the SDK and may depend on the version of Windows. It
seems that 'width' and 'height' are each limited to 2^15-1 and
there is a 16Mb limit on the total amount of memory in Windows
95/98/ME.
so I do wonder why you are surprised.
My laptop appears to be limited to about half your example with a 128Mb
graphics card (and lots of other things going on).
On Sun, 2 Oct 2005 stgries at arcor.de wrote:
Dear all
I have trouble with setting the size for jpegs and pngs. I need to save
a dendrogram of 1000 words into a jpeg or png file. On one of my
computers, the following works just fine:
bb<-agnes(aa, method="ward")
jpeg("C:/Temp/test.txt", width=17000, height=2000)
plot(bb)
dev.off()
On my main computer, however, this doesn't work:
jpeg("C:/Temp/test.txt", width=17000, height=2000)
Error in jpeg("C:/Temp/test.txt", width = 17000, height = 2000) :
unable to start device devWindows
In addition: Warning message:
Unable to allocate bitmap
This is a Windows XP Pro SP2 system, which is started with this chsort
R.version
_ platform i386-pc-mingw32 arch i386 os mingw32 system i386, mingw32 status major 2 minor 1.1 year 2005 month 06 day 20 language R which is started with a shortcut. "C:\rw2011\bin\Rgui.exe --max-mem-size=1500M" I checked the web and the R-help pages, tried out the ppsize option, and compared the options settings with those of the machine that works (which actually runs R 2.0.1 of 15 Nov 2004), but couldn't come up with an explanation. Any idea what I do wrong?
Did you read the help page?
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