Dear  all, I was wondering whether it was possible to use a logical operator to change the title of a plot in a proc gplot? ... View more

Dear all,   It's my first post here, so hopefully I've not messed up something.   I've used the following code to analyze a data set:   proc mixed data=datata method=ml ; class subject sex Form; model time = sex|form|age@2 / s; repeated / type=un subject=subject r; lsmeans form sex ; lsmestimate form "C vs S" -1 1 ; lsmestimate sex "F vs M" -1 1 ; run;   Can someone explain why in the solution for fixed effects I get Estimates equal to 0 for some effects and no info for their standard error, DF, t Value etc.   Thanks in advance ... View more