Have a look at hurdle() from the pscl package. HTH,
Thierry ---------------------------------------------------------------------------- ir. Thierry Onkelinx Instituut voor natuur- en bosonderzoek team Biometrie & Kwaliteitszorg Gaverstraat 4 9500 Geraardsbergen Belgium Research Institute for Nature and Forest team Biometrics & Quality Assurance Gaverstraat 4 9500 Geraardsbergen Belgium tel. + 32 54/436 185 thierry.onkel...@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-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 > > _______________________________________________ > R-sig-ecology mailing list > R-sig-ecology@r-project.org > https://stat.ethz.ch/mailman/listinfo/r-sig-ecology > Druk dit bericht a.u.b. niet onnodig af. Please do not print this message unnecessarily. Dit bericht en eventuele bijlagen geven enkel de visie van de schrijver weer en binden het INBO onder geen enkel beding, zolang dit bericht niet bevestigd is door een geldig ondertekend document. The views expressed in this message and any annex are purely those of the writer and may not be regarded as stating an official position of INBO, as long as the message is not confirmed by a duly signed document. _______________________________________________ R-sig-ecology mailing list R-sig-ecology@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-ecology
