[R] getting all contrasts from glm

[Mark Difford]

Jim,

>> 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.

Your best all round approach would be to use the multcomp package. In
particular, look at

?glht
?summary.glht
?contrMat

Regards, Mark.
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