From: Lisa Avery <lisa_avery_at_sympatico.ca>

Date: Mon 30 Oct 2006 - 14:51:05 GMT

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Tue Oct 31 02:17:07 2006

Date: Mon 30 Oct 2006 - 14:51:05 GMT

Hello, I am new to non-linear growth modelling in R and I am trying to
reproduce an analysis that was done (successfully) in S-Plus.

This is a what the grouped data object looks like:

Grouped Data: GMAE ~ AGE | STUDYID

20 1005 2 ACTUAL (unaided) in JAMA curves Level I Level I 56.53745

** GMFM GMFCS GMAE YRS
**
19 91.03394 1 74.16 4.092751

levelI.nlme<-nlme(GMAE~cp.grad(AGE,limit,lograte),

What am I doing wrong? Any insights would be very much appreciated.

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R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Tue Oct 31 02:17:07 2006

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