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, and it displays a nice error message telling you exactly why it
did not work if you try out of the box. Check parameter "method" in your
lme call. 

Dieter