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,
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