[R] Post-hoc t-tests in 2-way repeated measure ANOVA
gpagnon at emory.edu
Thu Aug 5 16:51:22 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!
Giuseppe Pagnoni, Ph.D.
Dept. of Psychiatry and Behavioral Sciences
1639 Pierce Drive, Suite 4000
WMB Bldg., Atlanta, GA 30322, U.S.
e-mail: gpagnon at emory.edu
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