Re: [R] "fitted probabilities numerically 0 or 1 occurred"

From: Prof Brian Ripley <>
Date: Tue, 11 Mar 2008 10:01:03 +0000 (GMT)

On Tue, 11 Mar 2008, Werner Wernersen wrote:

> Hi,
> could anyone explain to me what this warning message
> exactly means and what the consequences are?
> Is it due to the fact that there are very extreme
> observations / outliers included or what is the reason
> for it?

See MASS4 pp.197-8. (Assuming this is a binomial GLM: you did not say.)

> Thanks so much,
> Werner

Brian D. Ripley,        
Professor of Applied Statistics,
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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