Re: [R] Can't run nlme with nested structure

From: Andrew Robinson <A.Robinson_at_ms.unimelb.edu.au>
Date: Tue 12 Sep 2006 - 08:25:19 GMT

Hello Pekka,

there may be a way around it. However, you should provide commented, minimal, self-contained, reproducible code so we can see what you are trying to do. We need to see exactly what you are telling R, and what nlme is telling you.

Cheers

Andrew

On Tue, Sep 12, 2006 at 09:49:28AM +0300, Pekka Kontiainen wrote:
> Hello!
>
>
> So, my problem is following. I have bird offspring growth data and I'd
> like to model individual growth curves (aim is to study asymptotes and
> inflection points) with nlme according to Pinheiro & Bates 2000: first using
> nlsList to generate individual curves and then nlme to study the
> parameters and fixed effects. The data is structured to two levels. I
> have broods and individuals within the broods. Problems arise if I specify
> the groupedData object to have two levels. Running of the nlme gives me an
> error message "can't run the model with multiple levels", or something
> alike..
>
> Is there a way around this or should I start looking fo another way of
> analysing the data?
>
> Thank you for your time.
>
> Pekka Kontiainen
> Ph.D. Candidate
> Bird Ecology Unit
> Department of Environmental and Biosciences
> P.O. Box 65 (00014) University of Helsinki
> FINLAND
> Phone +35844-5496858
>
> ----- Edelleenl?hetetty viesti p??ttyy -----
>
>
> Pekka Kontiainen
> Ph.D. Candidate
> Bird Ecology Unit
> Department of Environmental and Biosciences
> P.O. Box 65 (00014) University of Helsinki
> FINLAND
> Phone +35844-5496858
>
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

-- 
Andrew Robinson  
Department of Mathematics and Statistics            Tel: +61-3-8344-9763
University of Melbourne, VIC 3010 Australia         Fax: +61-3-8344-4599
Email: a.robinson_at_ms.unimelb.edu.au         http://www.ms.unimelb.edu.au

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Received on Tue Sep 12 18:30:38 2006

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