[R-sig-ME] equation for linear mixed model for repeated measures data

David Winsemius dwinsemius at comcast.net
Tue Oct 11 00:17:49 CEST 2016


> On Oct 10, 2016, at 11:17 AM, Ahmad <ahmadr215 at tpg.com.au> wrote:
> 
> Dear Thierry
> 
> 
> 
> Thanks for your help on this,
> 
> I will try to find the book. Can I have the name of journal that Zuur’s paaper is published.
> 

https://www.google.com/search?q=zuur+2009+lme&oq=zuur+2009+lme
> 
> 
> Thanks again!
> 
> 
> 
> Ahmad
> 
> 
> 
> 
> 
> From: Thierry Onkelinx [mailto:thierry.onkelinx at inbo.be] 
> Sent: Monday, 10 October 2016 6:12 PM
> To: Ahmad <ahmadr215 at tpg.com.au>
> Cc: r-sig-mixed-models at r-project.org
> Subject: Re: [R-sig-ME] equation for linear mixed model for repeated measures data
> 
> 
> 
> Dear Ahmad,
> 
> 
> 
> You can find that in books like Pinheiro & Bates (2000) or Zuur et al (2009).
> 
> 
> 
> Best regards,
> 
> 
> 
> 
> ir. Thierry Onkelinx
> Instituut voor natuur- en bosonderzoek / Research Institute for Nature and Forest 
> team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance 
> Kliniekstraat 25
> 1070 Anderlecht
> Belgium
> 
> To call in the statistician after the experiment is done may be no more than asking him to perform a post-mortem examination: he may be able to say what the experiment died of. ~ Sir Ronald Aylmer Fisher
> The plural of anecdote is not data. ~ Roger Brinner 
> The combination of some data and an aching desire for an answer does not ensure that a reasonable answer can be extracted from a given body of data. ~ John Tukey
> 
> 
> 
> 2016-10-09 15:56 GMT+02:00 Ahmad <ahmadr215 at tpg.com.au <mailto:ahmadr215 at tpg.com.au> >:
> 
> Hi
> 
> 
> 
> I have used "nlme" package in R for linear mixed model with repeated
> measures using lme function (below):
> 
> 
> 
> model.1 <- lme(hta ~ group + days, data = dat, random = ~ 1 | id)
> 
> where is "hta" is the dependent variable, with 3 "groups" measured for 7
> "days", and "id" is the induvial observations (subject) that were repeated
> on for 7 days.
> 
> 
> 
> I am looking for the scientific question of this model for publication
> (e.g.; yij = â0 + â1X1ij ,..) in "nlme" package, but couldn't find it.
> 
> 
> 
> Any help comments would be greatly appreciated!
> 
> 
> 
> Ahmad
> 
> 
> 
> 
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> 
> 
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David Winsemius
Alameda, CA, USA



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