[R] How test contrasts/coefficients of Repeated-Measures ANOVA?

Ben Meijering b.meijering at student.rug.nl
Sat Dec 20 16:01:17 CET 2008

Hi all,

I'm doing a Repeated-Measures ANOVA, but I don't know how to test its  
contrasts or where to find the p-values of its coefficients. I know  
how to find the coefficient estimates of a contrast, but not how to  
test these estimates.

First I do something like:

y.aov <- aov(y ~ fac1 * fac2 + Error(subj/(fac1 * fac2)), data=data)

Then, with


I get the coefficients (which are, by default, treatment contrasts?),  
but p-values are not provided.
How do I obtain these p-values?

~ Ben

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