[R] (REPOST) Simple main effects in 2-way repeated measure ANOVA
gpagnon at emory.edu
Sun Aug 8 23:00:41 CEST 2004
I am running a 2-way repeated measure anova with 1 between-subjects
factor (Group=treatment, control), and 1 within-subject factor (Time of
measurement: time1, time2). I extract the results of the anova with:
summary(aov(effect ~ Group*Time + Error=Subj/Time, data=mydata))
Now, this must be clearly a dumb question, but how can I quickly
extract in R all the post-hoc t-tests for the simple main effects?
Also, while I am at it, how do I enter in the model a counfounding
covariate (e.g., Age)?
And on a different matter, is there a way to receive interactive user
input in an R script? Something like "Enter the name of the factor:
", or even more simply "Press <Enter> to see the result of the next
thanks in advance for any suggestions!
Dept. Psychiatry and Behavioral Sciences
1639 Pierce Drive, Suite 4000
Atlanta, GA, 30322
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