Hi, I am trying to run an ANCOVA test. here I have one continuous variable (PreN). But SAS cannot estimate this effect on ANOVA table. It gives me 0 DF and non-estimated F and P values. I used this model. proc mixed data=mBiomMMMm plots=residualpanel; class Year Trt Block Plot; model BiomN = Trt Year Year*Trt PreN*Trt Block/ solution; repeated Year / type = ar(1) subject = Plot(Trt); lsmeans Trt / cl; run; The continuous variable is in the interaction with a categorical variable (Trt). What can do to fix this problem and get the estimated value of precipitation? Please let me know if you know how I can fix this. I need the answer very soon.
... View more
