Hello, How do I run interaction between to categoric variables in lme()?
I tried this: > lmefit1<- lme(Handling ~Mass+factor(Prey)+factor (Decap)+ factor(Prey)*factor(Decap), random = ~ 1 |Place, data=nestling1) Error in MEEM(object, conLin, control$niterEM) : Singularity in backsolve at level 0, block 1 Regards Kes, [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.