Hi Pascal. I applied my analysis in time. I have 25 fire seasons, each season starts on November and ends up on April (our summer), so I have used them as independent observations. I know that assumption it could be wrong, but is the only way I can use the information available.
Thank you. 2012/3/7 Pascal Oettli <kri...@ymail.com> > Hi Lucas, > > Do you apply your analysis in time or in space? > > Regards, > Pascal > > > > ----- Mail original ----- > De : Lucas <lpchaparro...@gmail.com> > À : r-help@r-project.org > Cc : > Envoyé le : Mercredi 7 mars 2012 22h34 > Objet : [R] Problems with generalized linear model (glm) coefficients. > > Hello to everyone. > > I´m writing you because I´m feeling a bit frustrated with my work. > > My work consists in finding the relation between the amount of fires and > the weather, so, my response variable is the amount of fires in a fire > season and the explanatory variables are the temperature, the amount of > precipitation and the some others . my problem is this; I keep getting the > wrong sign in the coefficients estimated, I get a negative sign for > temperature and a positive sign for precipitation, which is unreasonable, > the greater the temperature I would expect more fire, on the contrary, the > greater the precipitation I would expect less fires. So far I have deal > with overdispersion, multicollinearity and the amount of zeroes through > passing from Poisson to Negative Binomial and Hurdle. I believe I have > used all my options and still have the wrong signs on my coefficients. > > Do I have more options? What does it mean that I keep getting those signs? > > If anyone could help me I would really appreciate it. > > Thank you. > > > Lucas. > > [[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. > > [[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.
