[R] R equivilant to RAND_MAX in C

[Rajarshi Guha]

On Tue, 2004-03-23 at 02:40, Prof Brian Ripley wrote:
> On Mon, 22 Mar 2004, Rajarshi Guha wrote:
> 
> > Hello,
> >   I have some C code that I'm interfacing to R using the .C calling
> > interface. Currently the C code uses the rand() function from the GNU C
> > library to generate random numbers. Since I need the random numbers in a
> > range from 0 to a (where a is an integer) I use the RAND_MAX macro as
> > 
> > (int)(rand() * (float)(*nobs-1) / (RAND_MAX+1.0))
> > 
> > (taken from the rand() manpage)
> 
> That isn't a random *number*: it is a random *integer*.  It is a random 
> integer on 0, ..., a=*nobs-2: is that what you wanted?

Yes. Thank you for the pointers

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Rajarshi Guha <rxg218 at psu.edu> <http://jijo.cjb.net>
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