Re: [R] Difficulty with lme

Kevin Wright gmail.com> writes: > > Generally, the only way to estimate f1:f2 is if you have all combinations of > data present for these two factors. Well, he said it was unbalanced, he didn't say how unbalanced -- i.e. it's not clear (to me) whether there are any completely missing cells or

Re: [R] Difficulty with lme

Generally, the only way to estimate f1:f2 is if you have all combinations of data present for these two factors. Sometimes it makes sense to include f1:f2 as a random effect in the model (which does NOT need balanced data) but that is something you have to decide. Kevin On Wed, Oct 5, 2011 at 2

[R] Difficulty with lme

Hi all, I'm having some difficulty with lme. I am currently trying to run the following simple model anova(lme(x ~ f1 + f2 + f1:f2, data=m, random=~1|r1)) Which is currently producing the error Error in MEEM(object, conLin, control$niterEM) : Singularity in backsolve at level 0, block 1 x i