Hello experienced! I've tried everything to analyze my data. I have data from blood samples taken at 3 times (hours, i.e. T1,T2,T3), 2 blocks (rounds in time), and a double factorial (Zn levels x Zn sources), with 5 pigs in each block sampled 3 times. When I try to analyze as repeated measures in time, the following message appears in Proc Mixed: “An infinite likelihood is assumed in iteration 0 because of a nonpositive definite estimated R matrix in SAS”. I'd really appreciate support, because I've tried everything. In Glimmix the data runs, but the degrees of freedom don't look right.
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