Dear all, I'm building binomial mixed-model using lme4 package. I'm able to obtain outputs properly except when I include two particular variables: date (from 23 to 34; 1 being to first sampling day) and Latitude (UTM/100 000, from 55.42 to 56.53). No "NA" is any of those variables. In those cases, I get the warning message: "nlminb failed to converge" I tried to modify lmer controls as : msMaxIter; maxIter... but I still get the message. Should I bother about it? If yes, what should I do to not get the message?
Thank you all in advance for you answers. PS: My model writing is for example Fm<-lmer(alive~factor(sex)+mass+parasite+Latitude+(1|ID), family=binomial, method="AGQ", data=donnee). Where "parasite" is presence/absence (0 or 1) and ID is the station identity where I captured 0 to 20 specimens, each being alive or dead, having a sex, a mass, a presence/absence of parasite. Latitude is given at the station level. Date is given at the specimen level because I sampled for 4 days in each station. Jérôme Lemaître Ph.D. student Départment of biology, University Laval Quebec, Canada ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
