[R] nlme

[Andrew Perrin]

If I understand your question correctly, the syntax is:

response ~ primary1 + primary2 + ... + primaryn |
grouping1/grouping2/.../groupingm

where there are n primary covariates and m grouping levels.

ap

----------------------------------------------------------------------
Andrew J Perrin - http://www.unc.edu/~aperrin
Assistant Professor of Sociology, U of North Carolina, Chapel Hill
clists at perrin.socsci.unc.edu * andrew_perrin (at) unc.edu


On Sat, 24 Aug 2002, Nathan Leon Pace, MD, MStat wrote:

> In the non linear mixed effects package a groupedData object can be 
> created to facilitate modeling.
> 
> The gD object includes a formula of the form 'response variable' ~ 
> 'primary covariate' | 'grouping factor'.
> 
> In experiments creating response surfaces there are 2 or more primary 
> covariates.
> 
> Is there any way to use the groupedData() function to include 2 primary 
> covariates?
> 
> Thanks
> 
> -- 
> Nathan Leon Pace, MD, MStat  Work:nlpace at bigpace.med.utah.ed
> Department of Anesthesiology Play:nlpaces at attbi.com
> University of Utah           Voice Work:801.581.6393  Play:801.467.2925
> Salt Lake City, Utah         Fax   Work:801.581.4367  Play:801.467.0555
> 
> 
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