[R] AIC models are not all fitted to the same number of observation

Hi, Using lme from the package nlme 3.1-103, I meet a strange warning. I am trying to compare to models with: library(nlme) lmez6=lme(lepus~vulpes,random=~1|troncon/an,data=ika_z6_test) lmez60=lme(lepus~1,random=~1|troncon/an,data=ika_z6_test) Both have the same number of observations and

Re: [R] AIC models are not all fitted to the same number of observation

Le 21/03/2012 10:56, Patrick Giraudoux a écrit : Hi, Using lme from the package nlme 3.1-103, I meet a strange warning. I am trying to compare to models with: library(nlme) lmez6=lme(lepus~vulpes,random=~1|troncon/an,data=ika_z6_test)