[R] glm.fit: "fitted probabilities numerically 0 or 1 occurred"

[Werner Wernersen]

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?

Thanks so much,
  Werner


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

[Prof Brian Ripley]

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,  [EMAIL PROTECTED]
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel:  +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UKFax:  +44 1865 272595

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