On Wed, 23 Mar 2005, David Ruau wrote:
I am working with R on 2xG5 1.8Ghz from Apple under 10.3.8 The G5 chip is 64 bits but does R run in 64 bit or 32 under OS X? How can know?
From the size of the ncells!
32-bit machine:
gc()
used (Mb) gc trigger (Mb) Ncells 144907 3.9 350000 9.4 Vcells 61911 0.5 786432 6.0
64-bit machine:
gc()
used (Mb) gc trigger (Mb) Ncells 141134 7.6 350000 18.7 Vcells 63088 0.5 786432 6.0
The ncells are 28bytes on a 32-bit machine and usually 56 on a 64-bit machine (depending on alignment needs).
I think it run in 32 bits... but not sure...
The precompiled binary is definitely 32-bit. If you compiled R yourself I suspect you would know if you sed a 64-bit compiler (if you had one).
-- 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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