[R] Step and stepAIC

[Dieter Menne]

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

> 
>lme(biomarker~Cmax+AGE,data=cov,method='ML',random=~1+AGE|ID,keep.data=T)
> Warning message:
> In lme.formula(biomarker ~ Cmax + AGE, data = cov, method = "ML",  :
>   Fewer observations than random effects in all level 1 groups

That's why the posting guide says: tell the whole story. After
that warning, expect everything. You want too much from your data.


Dieter