PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
We have nothing at all to go on. John Kane Kingston ON Canada > -----Original Message----- > From: lpchaparro...@gmail.com > Sent: Wed, 7 Mar 2012 10:34:09 -0300 > To: r-help@r-project.org > Subject: [R] Problems with generalized linear model (glm) coefficients. > > Hello to everyone. > > I4m writing you because I4m 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. ____________________________________________________________ FREE ONLINE PHOTOSHARING - Share your photos online with your friends and family! Visit http://www.inbox.com/photosharing to find out more! ______________________________________________ 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.
