Hi, sorry I can't provide the reproducible code - the formula is currently
being worked on for a research paper so I can't really give out details in
that regard.
That being said, k is initialized to 1 at the beginning of the loop. n has
various values (whole numbers, 0 or greater, no upper limit).



On Tue, Mar 26, 2013 at 3:41 PM, Berend Hasselman <bhh@xs4all.nl> wrote:

>
> On 26-03-2013, at 16:25, Sahana Srinivasan <sahanasrinivasan.91@gmail.com>
> wrote:
>
> > Hi,
> > I'm using R to do a series of calculation and I have gotten several
> > warnings that say "NaNS produced". Whatever I could read on line gives me
> > an idea that this warning is produced when the number is use is a
> negative
> > log or otherwise mathematically problematic.
> > I'm getting this error while using factorial() and gamma () on strictly
> > positive numbers (always greater than zero).
> > Here is a snippet of my code:
> > k goes from 1 to a positive limit.
> > S is always 100.
> > Only positive values of n are allowed into the loop.
> >
> > if(n>0)
> > {
> > while(k<=lim)
> >       {
> >
> >         sn<-(S-n);snfact<-gamma(sn);
> >         sn2<-(2-n+S);sn2gam<-gamma(sn2);
> >
> >         num<-(ngam*sn2gam);
> >
> >
> >         nk2<-(2+k-(2*n)+S);
> >         nk2gam<-gamma(nk2);
> >         den<-(k*nk2gam);
> >         prob<-(num/den);
> >
> >         sum<-(as.numeric((k*prob))+sum);
> >
> >         k<-k+1;
> >       }
> > }
> >
> > The error message  received for every instance of this loop is :
> > In gamma(sn) : NaNs produced
> > In gamma(sn2) : NaNs produced
> > In gamma(nk2) : NaNs produced
> >
>
> This not reproducible code.
> Where is ngam?
> Where is k set to 1?
> What value does n have?
>
> Berend
>
>

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