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Re: st: RE: large numbers in comb(n,k) function: no success


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: large numbers in comb(n,k) function: no success
Date   Thu, 5 Feb 2009 13:09:32 +0000 (GMT)

--- On Thu, 5/2/09, Inna Becher wrote:
> I have to calculate  probabilities for observations to be
> sampled. That's why I use exp with lnfactorial...

Looks like you want to calculate a likelihood function. Is that right?
If so, then you can use the fact that you almost always maximize the log likelihood, which will alow you to avoid taking the exp of lnfactorial.  

-- Maarten

-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room N515

+31 20 5986715

http://home.fsw.vu.nl/m.buis/
-----------------------------------------





      

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