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To: r-help@stat.math.ethz.ch, s-news@wubios.wustl.edu, nlme-announce@franz.stat.wisc.edu
Subject: nlme
From: "Nathan Leon Pace, MD, MStat" <nlpace@remi.med.utah.edu>
Date: Sat, 24 Aug 2002 14:09:53 -0600
Organization: University of Utah
Reply-to: nlpace@remi.med.utah.edu
User-agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en-US; rv:0.9.4) Gecko/20011126 Netscape6/6.2.1
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@bigpace.med.utah.ed
Department of Anesthesiology Play:nlpaces@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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