Hi Chuck! Actually my data has a lot of zeros because I counted the number of species that is exclusive to each studied fragment. So, my response variable is the number of exclusive species. That's why it has a lot of zeros. I have fragments that do not present exclusive species.
Thank's for your help! 2012/3/27 chuck.01 <charliethebrow...@gmail.com> > Could you please post a small example of your data and code which gives you > this error. Your assumed error distribution sounds reasonable. I am > interested as to why you have zeros... you have sites with species richness > ==0 ?? > > > > Lívia Dorneles Audino wrote > > > > I'm trying to make a glmm to identify the relationship between insect > > species richness with fragment size, isolation and time (different > years). > > I already tried to analyse it using poisson distribution error, but I > > always face with the following warning: > > *glm.fit: fitted probabilities numerically 0 or 1 occurred * > > > > This is probably hapenning because my dataset has a lot of zeros. So, > what > > error distribution should I use? > > > > -- > > *Lívia * > > > > [[alternative HTML version deleted]] > > > > > > ______________________________________________ > > R-help@ mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide > > http://www.R-project.org/posting-guide.html > > and provide commented, minimal, self-contained, reproducible code. > > > > > -- > View this message in context: > http://r.789695.n4.nabble.com/What-error-distribution-should-I-use-tp4509479p4510351.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- *Lívia Dorneles Audino* Doutoranda em Entomologia Laboratório de Ecologia e Conservação de Invertebrados Universidade Federal de Lavras [[alternative HTML version deleted]]
______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
