Re: [R] GLM / Logistic Regression Problem

2011-03-02 Thread Bert Gunter
Please read the Help for predict.glm carefully to make sure you are not confusing predicted response on the linear scale (log odds) with that on the probability scale. The warning is just that: a warning. It means that you have fitted PROBABILITIES on the boundary, which might compromise the itera

[R] GLM / Logistic Regression Problem

2011-03-02 Thread patsko
Hi there, I am encountering a problem with the GLM tool performing logistic regression. After computing a warning appears, saying “glm.fit: fitted probabilities numerically 0 or 1 occurred”. A prediction of new values confirms the problem as the model does not produce regular probability estima