[R] multiple comparison of means with glm model

Wade Wall wade.wall at gmail.com
Thu Oct 15 22:27:56 CEST 2009

Hi all,

I have a data set that I am analyzing and I am trying to do a multiple
comparison of means under a glm model.  The factors are 2 light
treatments and 3 temperature treatments in a complete block design
analyzed using a glm.

My question is how do I do a multiple comparison of means using the
multcomp() package.  I have used the following code to look at each
treatment separately.


but would like to add both temp and light.  Is this possible, or is
better to simply set up contrasts and adjust?

Any help would be appreciated.


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