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.





andydolman@gmail.com


2009/5/20 Matthew Albrecht <albrem04@student.uwa.edu.au>

> Matthew Albrecht wrote:
> > Looking at the data, it looks parabolic, so I fitted the data to a
> > second order polynomial:
>
> I've just been pointed out the incorrectness of this sentence.
> Apologies, it should read:
> "I fitted a second order polynomial to the data."
>
> I'm using the excuse that it was quite a late night that night.
> Matt
>
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