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burn02
2003 Nov 04
1
glm offset and interaction bugs (PR#4941)
...0
OS: i686-pc-linux-gnu (Suse 8.2)
Submission from: (NULL) (134.84.86.22)
Two bugs (perhaps related, perhaps independent) 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,...