Re: [R] contrasts for lm

From: Dieter Menne <dieter.menne_at_menne-biomed.de>
Date: Thu 08 Dec 2005 - 19:03:56 EST

Ann Hess <hess <at> stat.colostate.edu> writes:

>
> Here is my model statement:
>
> Model<-lm(log2PM~P+T+P*T)
>
> where P has 16 levels, T(treatment) has 12 levels and I am interested in
> looking at different treatment comparisons.

With so many levels, you should do something against fishing for error accumulation and use simint(simtest) in package multcomp, which can handle lmmodels.

Dieter



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