[R] aov() question
Leigh E Alexander
Leigh.Alexander at Colorado.EDU
Wed Jul 11 19:32:40 CEST 2007
So I think I have seen some similar questions to mine when I searched
the archives, but have not seen any concrete answers and was
wondering if any one could help.
I have been trying to use R's aov() function to analyze my data. I
have a 3 x 4 x 2 repeated measures design. All of the IVs are within
subjects. I do also have missing values (unequal N), as I have to
remove any incorrect trials for each subject.
Here is the code I entered and the error message:
a<-aov(log(rt)~(tran*block*half) + Error (sid/ (tran*block*half)),
Error() model is singular in: aov(log(rt) ~ (tran * block * half) +
Error(sid/(tran * block *
I then do summary(a) and am able to get an output, but I am not sure
whether or not I can trust that output since I got the error message.
Any body have any thoughts/solutions for this?
Also, are there any benefits of you aov() vs. use some of the linear
model functions or vice versa?
Thanks for any help you can offer!!
More information about the R-help