Re: [R-sig-eco] Zero-truncated Poisson model in R

2010-05-17 Thread ONKELINX, Thierry 
Have a look at hurdle() from the pscl package.

HTH,

Thierry


ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek
team Biometrie  Kwaliteitszorg
Gaverstraat 4
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Belgium

Research Institute for Nature and Forest
team Biometrics  Quality Assurance
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tel. + 32 54/436 185
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 -Oorspronkelijk bericht-
 Van: r-sig-ecology-boun...@r-project.org 
 [mailto:r-sig-ecology-boun...@r-project.org] Namens Manuel Spínola
 Verzonden: maandag 17 mei 2010 4:15
 Aan: r-sig-ecology@r-project.org
 Onderwerp: [R-sig-eco] Zero-truncated Poisson model in R
 
 Dear list members,
 
 Is there any function  to do zero-truncated poisson or 
 zero-truncated negative binomail in R?
 Thank you very much in advance.
 Best,
 
 Manuel Spínola
 
 --
 Manuel Spínola, Ph.D.
 Instituto Internacional en Conservación y Manejo de Vida 
 Silvestre Universidad Nacional Apartado 1350-3000 Heredia
 COSTA RICA mspin...@una.ac.cr mspinol...@gmail.com
 Teléfono: (506) 2277-3598
 Fax: (506) 2237-7036
 
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Re: [R-sig-eco] Zero-truncated Poisson model in R

2010-05-17 Thread Maarten de Groot 

Hi Manuel,

It seems that the package VGAM is taking zerotruncated models into 
account. You can find more info on 
http://www.stat.auckland.ac.nz/~yee/VGAM/index.html. You can use as a 
family function posnegbinomial (for zero truncated data with negative 
binomial distribution) or pospoisson (for zero truncated data with 
poisson distribution).


kind regards,

Maarten

Manuel Spínola wrote:

Dear list members,

Is there any function  to do zero-truncated poisson or zero-truncated 
negative binomail in R?

Thank you very much in advance.
Best,

Manuel Spínola



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[R-sig-eco] Zero-truncated Poisson model in R

2010-05-16 Thread Manuel Spínola 

Dear list members,

Is there any function  to do zero-truncated poisson or zero-truncated 
negative binomail in R?

Thank you very much in advance.
Best,

Manuel Spínola

--
Manuel Spínola, Ph.D.
Instituto Internacional en Conservación y Manejo de Vida Silvestre
Universidad Nacional
Apartado 1350-3000
Heredia
COSTA RICA
mspin...@una.ac.cr
mspinol...@gmail.com
Teléfono: (506) 2277-3598
Fax: (506) 2237-7036

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