[R-sig-ME] Fwd: Re: Question on the glmer function of the lme4 R package

[Feddag Mohand-Larbi]

Dear Thiery

Thanks for your email.

The subscripts i and j are the subject i and j (in our case the subjects
are the lizards (players)). U is the n vector of the random effects
(U1,...,Un). Each random effect Ui is supposed to be distributed as
normal with mean 0 and variance sigma^2.

For our data (attached in Data.txt file), the matrix is of order
(77*77), and contains  only 100 non missing data (all the remaining are
missing (NA)).

The matrix of covariates (attached in Covariates.txt) is of order (77*4).

We would like to estimate the four fixed effects parameters associated
to the covariate matrix and the variance of the random effects Ui.


Best regards


Dr Feddag






On 07/03/2012 10:36, ONKELINX, Thierry wrote:
> We need more information to connect your data to the model. What is the interpretation of the subscript i and j and U in connection to your data? How does your dataset look like?
>
> Best regards,
>
> Thierry
>
> 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
> + 32 2 525 02 51
> + 32 54 43 61 85
> Thierry.Onkelinx at inbo.be
> www.inbo.be
>
> 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
>
> -----Oorspronkelijk bericht-----
> Van: r-sig-mixed-models-bounces at r-project.org [mailto:r-sig-mixed-models-bounces at r-project.org] Namens Feddag Mohand-Larbi
> Verzonden: dinsdag 6 maart 2012 17:18
> Aan: r-sig-mixed-models at r-project.org
> Onderwerp: [R-sig-ME] Question on the glmer function of the lme4 R package
>
> Dear all,
>
> Could you please help me in the estimation of the different parameters of the Bradley-Terry model with random effects by the glmer function of the lme4 R package.
>
> The model, the marginal likelihood and the real data and the main question are described in the attached file.
>
> Best regards
>
>
>  Dr Feddag
>
>
>


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