[R-sig-ME] strategy to iterate over repeated measures/longitudinal data

hadley wickham h.wickham at gmail.com
Tue Jul 21 15:42:17 CEST 2009

> For each predictor:
> 1. create a long data set using the predictor and all measurements
> (using make.univ function from  multilevel package)
> 2. run lmer, extract the coefficient of interest
> 3. go to next predictor
> The end result is a vector of 400,000 coefficients.
> Do you have any suggestions on how I can improve this strategy?

What sort of improvement are you looking for?  Speed?  Elegance?  Ease of use?



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