[R] 3 variables - GLM -- Warning Message ?

[ONKELINX, Thierry]

J,

For at least one combination of Aeventexhumed:HTL:Sector Shell is either 0 or equal to TotalEggs.

Best regards,

ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and Forest
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
Kliniekstraat 25
1070 Anderlecht
Belgium
+ 32 2 525 02 51
+ 32 54 43 61 85
Thierry.Onkelinx op inbo.be
www.inbo.be

To call in the statistician after the experiment is done may be no more than asking him to perform a post-mortem examination: he may be able to say what the experiment died of.
~ Sir Ronald Aylmer Fisher

The plural of anecdote is not data.
~ Roger Brinner

The combination of some data and an aching desire for an answer does not ensure that a reasonable answer can be extracted from a given body of data.
~ John Tukey

-----Oorspronkelijk bericht-----
Van: r-help-bounces op r-project.org [mailto:r-help-bounces op r-project.org] Namens Jhope
Verzonden: dinsdag 24 januari 2012 9:53
Aan: r-help op r-project.org
Onderwerp: [R] 3 variables - GLM -- Warning Message ?

Hi , I am trying to do a 3 variable interaction and received this warning message. Can someone please interpret? 

Model31.glm <- glm(cbind(Shells, TotalEggs-Shells) ~ Aeventexhumed:HTL:Sector, data=data.to.analyze, family = binomial) Warning message:
glm.fit: fitted probabilities numerically 0 or 1 occurred

Thanks,
J

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