Try:

> 8*4
[1] 32

As per the help page for .Machine:

  sizeof.pointer        the number of *bytes* in a C SEXP type.

So:

  8 bits per byte * 4 bytes = 32 bits


:-)

HTH,

Marc Schwartz


on 08/08/2008 03:58 PM milton ruser wrote:
Dear Prof. B.Ripley,

If :
.Machine$sizeof.pointer
[1] 4
2*2*2*2
[1] 16

So I am running with 16 bits?

How can I know the number of bits supported on my machine?

Kindly,

miltinho astronauta
brazil

On 8/8/08, Prof Brian Ripley <[EMAIL PROTECTED]> wrote:
Look at .Machine$sizeof.pointer (in bytes).

On Fri, 8 Aug 2008, Tom La Bone wrote:


I think I installed 64-bit Ubuntu 8.04 and 64-bit R on my computer. I
can't
seem to find anything that says "this is 64-bit Ubuntu" or "this is 64-bit
R". How do I tell what version of R I am running?

Tom

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