[R-sig-ME] glmmadmb beta - error

[Highland Statistics Ltd]

>
> ------------------------------
>
> Message: 2
> Date: Tue, 23 Feb 2016 09:58:39 +0100
> From: Ludovico Frate <ludovicofrate at hotmail.it>
> To: "r-sig-mixed-models at r-project.org"
> 	<r-sig-mixed-models at r-project.org>
> Subject: [R-sig-ME] glmmadmb beta - error
> Message-ID: <DUB126-W5256D4E695B95DA5076216D6A40 at phx.gbl>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Dear list,I have got the following error message trying to fit this model:
> glmmadmb<-(cover~time+summit+direction+(1|plot_id), family = "beta", data = cover_lf)
> Error in glmmadmb(cover~time+summit+direction+(1|plot_id),  :   The function maximizer failed (couldn't find parameter file) Troubleshooting steps include (1) run with 'save.dir' set and inspect output files; (2) change run parameters: see '?admbControl';(3) re-run with debug=TRUE for more information on failure modeIn addition: Warning message:running command 'C:\Windows\system32\cmd.exe /c glmmadmb -maxfn 500 -maxph 5 -noinit -shess' had status 1
> str(cover_lf)'data.frame':	50 obs. of  5 variables: $ plot_id  : Factor w/ 48 levels "FEME11","FEME13",..: 5 6 7 8 1 2 3 4 9 10 ... $ summit   : Factor w/ 2 levels "FEM","MAC": 1 1 1 1 1 1 1 1 1 1 ... $ direction: Factor w/ 4 levels "E","N","S","W": 2 2 2 2 1 1 1 1 3 3 ... $ time     : Factor w/ 2 levels "2001","2015": 1 1 1 1 1 1 1 1 1 1 ... $ cover   : num  0.023 0.071 0.063 0.014 0.003 0.035 0.055 0.01 0.065 0.04 ...
> cover is the dependent variable that is percentage of cover (0-100) divided by 100 to match the beta distribution. The random effect was included to allow repeated measure on each plot for two time period (time treated as factor).
> Thank you in advance,Regards
> Ludovico

Do I read correctly in the error message the phrase '50 obs. of 5 
variables"? Does that mean that you only have 50 observations? If that 
is the case then it is no wonder that a beta model with random effects 
(48 levels?) and 6 or 7 regressions parameters is crashing.

Kind regards,

Alain
>


>                                                                                                                                  
> Dott. For. Ludovico
> Frate, Ph.D.
> University of Molise - Italy
> Environmetrics Lab
> http://www.distat.unimol.it/STAT/environmetrica/organico/collaboratori/ludovico-frate-1
> Department of Biosciences and Territory - DiBT
> Universit? del Molise.
> Contrada Fonte
> Lappone,
> 86090 -  Pesche (IS)
> ITALIA.
> Cel: ++39
> 3333767557
> Fax: ++39 (0874) 404123
> E-mail ludovico.frate at unimol.it
> ludovicofrate at hotmail.it
> https://www.researchgate.net/profile/Ludovico_Frate
>   		


>

-- 
Dr. Alain F. Zuur

First author of:
1. Beginner's Guide to GAMM with R (2014).
2. Beginner's Guide to GLM and GLMM with R (2013).
3. Beginner's Guide to GAM with R (2012).
4. Zero Inflated Models and GLMM with R (2012).
5. A Beginner's Guide to R (2009).
6. Mixed effects models and extensions in ecology with R (2009).
7. Analysing Ecological Data (2007).

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