03-25-2018 03:10 PM
ods output LSMeans=LSM;
PROC MIXED data=adpro3 noclprint;
CLASS trtn monthn usubjid;
MODEL aval = base trtn monthn trtn*monthn /ddfm=kr s;
repeated monthn / subject = usubjid type = un;
lsmeans trtn*monthn / slice= monthn pdiff cl;
But in the log the following warning information appeared:
unable to make hessian positive definite.
What's wrong with my coding? What is repeated measure analysis?
Please help. Thank you!
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