Thanks a lot, Dieter,

I changed the "method" to ML for my lme call. Now I get a different error
when running the stepAIC

Error in terms.formula(formula, data = data) :
  'data' argument is of the wrong type

What does that mean?
The same dataset was used for an lm call and everything is fine to run
stepAIC.

Jun

On Thu, May 7, 2009 at 10:44 AM, Dieter Menne
<dieter.menne@menne-biomed.de>wrote:

> 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
>
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> PLEASE do read the posting guide
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>



-- 
Jun Shen PhD
PK/PD Scientist
BioPharma Services
Millipore Corporation
15 Research Park Dr.
St Charles, MO 63304
Direct: 636-720-1589

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