Step and stepAIC

Jun Shen <jun.shen.ut <at> gmail.com> writes:

I also wonder if stepAIC can work with an lme model. I tried. it doesn't for
now. Appreciate any comment.

It can do it, and it displays a nice error message, as I remember, why
it won't do it in the default setting. Check parameter method of your 
lme call.

Dieter