Re: Generating overdispersed poisson data

["Neal Alexander" <Neal.Alexander@lshtm.ac.uk>]

 

You can use the 'rnegbin' function within the 'mass' library to generate a random sample from the negative binomial distribution, which is a gamma mixture of Poissons.  Neal

 

Neal Alexander        http://www.lshtm.ac.uk/ideu/staff/nalexander.html

>>> "Huso, Manuela" <manuela.huso@oregonstate.edu> 31/07/2007 19:00:49 >>>

Dear S-news list readers,

I am carrying out some simulations in which I need to generate overdispersed poisson data.  The rpois function only takes sample size and mean as its arguments.  What do I need to do to create overdispersed poisson data?  I apologize if this is a naïve question.  A search of the archives revealed nothing on this subject.

Many thanks for your help.

Manuela

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Manuela Huso
Consulting Statistician
Department of Forest Science
201H Richardson Hall
Oregon State University
Corvallis, OR   97331
ph: 541.737.6232
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