11-02-2016 02:24 PM
I have a data set of count data (Variable is TOTAL) that on histogram is definitly following Poisson and have many zeros values as well
When I run this programmation below it runs fine in its default normal mode but as soon as I put Dist Poisson Link=log" in the programmation then SAS cant do it ... I am guessing its because of Log(0)=err but the same model in R with family poisson runs fine ... why and what is my solution in this SAS programmation please?
proc glimmix data=FAMAIN plots=ALL;
class HiveOrientation SunPosition Box Bloc Boxid HiveID Day;
model TOTAL = HiveOrientation|SunPosition|Box /*/dist=poisson link=log solution*/;
random Bloc HiveID(Bloc) Day(HiveID Bloc);
lsmeans SunPosition /pdiff ilink lines;
11-02-2016 03:29 PM
perhaps i have to change SAS Main procedure and include zero inflated ? or I dont have enough zero and I could manually transformed log(x+1) - count data variance increasing with count value is my case for sure ...