[R-sig-ME] lme/lmer for drug effects on blood pressure
David.Duffy at qimr.edu.au
Fri May 22 08:12:57 CEST 2009
On Fri, 22 May 2009, Matthew Albrecht wrote:
> Thanks Andrew, much appreciated.
> Andrew Dolman wrote:
>> Hi Matthew,
>> You haven't had any other replies so I'll just note that
>> lmer(pressure~drug*poly(timep,2)+(1|ID), data=drugdat)
>> looks OK to me.
If the random effects are not too complicated and you are interested in
the effects of timep, you might like to compare results using the
SemiPar and mgcv packages -- both can fit GAMMs and the like (and make
pretty graphics ;))
Cheers, David Duffy.
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