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...ameter, so should be different from the Chisq test. The following is what I got from Splus: deathstar[31] Splus S-PLUS : Copyright (c) 1988, 2000 MathSoft, Inc. S : Copyright Lucent Technologies, Inc. Version 6.0 Release 1 for Linux 2.2.12 : 2000 Working data will be in /data/home/faculty/yuedong/MySwork > counts <- c(18,17,15,20,10,20,25,13,12) > outcome <- factor(rep(1:3,3)) > treatment <- factor(rep(1:3,c(3,3,3))) > glm.D93 <- glm(counts ~ outcome + treatment, family=poisson()) > anova(glm.D93, test="Chisq") Analysis of Deviance Table Poisson model Response...

Is this a bug? If not, I am curious to know why '[<-.data.frame' was designed to yield a.frame$y != a.frame$z rather than refusing to carry out the operation at all. > a.frame <- data.frame( x=letters[1:5] ) > a.frame[ 2:5, "y" ] <- letters[2:5] > a.frame[[ "z" ]][ 2:5 ] <- letters[2:5] > a.frame x y z 1 a b <NA> 2 b c

Full_Name: Axel Benz Version: 1.7.1 OS: Windows Submission from: (NULL) (137.251.33.43) This feature seems to be a basic bug: > 1=="1" [1] TRUE > as.numeric(1)=="1" [1] TRUE > as.numeric(1)==as.character("1") [1] TRUE isn't it necessary to distinguish beteen numbers and characters?? Best Regards, Axel