I'm using the following model to do an analysis

faicout <- glm(cbind(events,patnums-events) ~  as.factor(treat) + as.factor(numtrial), family = binomial )

Is this example there are 4 treatments . In the glm object I can find the contrasts  of the main treats vs the first i.e. 2v1, 3v1 and 4v1 ... however I would like to get the complete set including 3v2, 4v2, and 4v3 ... along with the Std. Errors of all contrasts.  I've tried the contrasts argument of glm and attempted to use  model.matrix.default but with no luck.

Any suggestions how to get all treat contrasts with SE's?

Thanks

J

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Dr. Jim Maas
University of East Anglia

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