Re: [R] overdispersion + GAM

From: Gavin Simpson <>
Date: Mon, 11 Feb 2008 17:36:43 +0000

On Mon, 2008-02-11 at 07:35 -0800, anna banana wrote:
> Hi,
> there are a lot of messages dealing with overdispersion, but I couldn't find
> anything about how to test for overdispersion. I applied a GAM with binomial
> distribution on my presence/absence data, and would like to check for
> overdispersion. Does anyone know the command?

Bernoulli data (presence/absence of single species say) can't be overdispersed, so there is no need to test or correct for it.


> Many thanks,
> Anna

 Dr. Gavin Simpson             [t] +44 (0)20 7679 0522
 ECRC, UCL Geography,          [f] +44 (0)20 7679 0565
 Pearson Building,             [e]
 Gower Street, London          [w]
 UK. WC1E 6BT.                 [w]

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