search for: pyral

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2005 Jul 27
1
Question on glm for Poisson distribution.
...my question as an autonomous student searching in the huge pile of papers on my desk and on the Internet but I can't find out the solution. Would you mind giving me some help? Please. ######################################### I'm trying to use glm with factors: > Pyr.1.glm<-glm(Pyrale~Trait,DataRav,family=poisson) If I have correctly payed attention to my cyber professor explanations I have, for the variable Pyrale which I suppose Poisson-distributed, the following mathematical expression: P(Pyrale=k)=exp(-m).[(m^k)/k!] with log(m)=Intercept+Trait(i) (link function is log f...
2005 Jul 22
0
Significant difference of coefficients in glm with factors?
Hi and sorry to distur, ########### Setting ################# I'm trying to use glm with factors: > Pyr.1.glm<-glm(Pyrale~Trait,DataRav,family=poisson) > summary(Pyr.1.glm) Call: glm(formula = Pyrale ~ Trait, family = poisson, data = DataRav) Deviance Residuals: Min 1Q Median 3Q Max -1.7117 -0.8944 -0.6237 0.6390 1.5224 Coefficients: Estimate Std. Error z value Pr(>|z|) (Intercept) 1.3350 0.2294 5.819 5....