AD Hayward wrote:
>
> I'm attempting to use a piecewise regression to model the trajectory
> of reproductive traits with age in a longitudinal data set using a
> mixed model framework.
>
You might have a look a Alejandro Jara DPpackage which worked quite well for
me in a similar case.
There is also a special list dedicated to lmer:
http://news.gmane.org/gmane.comp.lang.r.lme4.devel
Dieter
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