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2003 Nov 04
1
glm offset and interaction bugs (PR#4941)
...dependent) revealed by the same Poisson regression with offset mydata <- read.table(url("http://www.stat.umn.edu/geyer/5931/mle/seeds.txt")) out.fubar <- glm(seedlings ~ burn01 + vegtype * burn02 + offset(log(totalseeds)), data = mydata, family = poisson) summary(out.fubar) out.barfu <- glm(seedlings ~ burn01 + vegtype * burn02, offset = log(totalseeds), data = mydata, family = poisson) summary(out.barfu) out.ok <- glm(seedlings ~ vegtype * burn02 + burn01, offset = log(totalseeds), data = mydata, family = poisson) summary(out.ok) As far as I can tell from readin...