I have a repeated measures anova with 5 repeated time periods and the response measured at 3 stress levels and I am estimating the model as:
wsanova resp time,id(spec) between(stress) eps
test, showorder shows there to be 54 elements in the design matrix.
My problem is that I want to look at time*stress interactions at the last time period. I have constructed a test matrix for the necessary constraints but I get the following error message:
. test, test(c6)
( 1) time[5]*stress[1] - time[5]*stress[2] = 0
( 2) time[5]*stress[1] - time[5]*stress[3] = 0
( 3) time[5]*stress[2] - time[5]*stress[3] = 0
Constraint 1 dropped
Constraint 2 dropped
Constraint 3 dropped
. test, test(c6) mtest(sidak)
_mtest: 0 valid tests
I can carry out this tests at other time periods.
My question is how can I carry out this particular test.
Thank you,
Janet
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