[R] Integer precision etc.

[Marc Schwartz]

On Wed, 2003-08-13 at 07:55, Ted.Harding at nessie.mcc.ac.uk wrote:
> Hi Folks,
> With a bit of experimentation I have determined (I think)
> that on my R implementation the largest positive integer
> that is exactly represented is (2^53 - 1), based on
> 
> > (((2^53)-1)+1) - ((2^53)-1)
> [1] 1
> > ((2^53)+1) - (2^53)
> [1] 0
> 
> System:
> platform i686-pc-linux-gnu
> arch     i686
> os       linux-gnu
> system   i686, linux-gnu
> status
> major    1
> minor    6.1
> year     2002
> month    11
> day      01
> language R
> 
> Is there any other way to determine this sort of information?
> 
> With thanks,
> Ted.


Ted,

See ?.Machine

No experimentation required  :-)

HTH,

Marc Schwartz