Hi to all,
Is there a possibility to choose which value is used for the intercept
or does in not make any sense?
f.e I would like to use outcome2 for the intercept
## Dobson (1990) Page 93: Randomized Controlled Trial :
counts <- c(18,17,15,20,10,20,25,13,12)
outcome <- gl(3,1,9)
treatment <- gl(3,3)
print(d.AD <- data.frame(treatment, outcome, counts))
glm.D93 <- glm(counts ~ outcome + treatment, family=poisson())
summary(glm.D93
Coefficients:
Estimate Std. Error z value Pr(>|z|)
(Intercept) 3.045e+00 1.709e-01 17.815 <2e-16 ***
outcome2 -4.543e-01 2.022e-01 -2.247 0.0246 *
outcome3 -2.930e-01 1.927e-01 -1.520 0.1285
treatment2 8.717e-16 2.000e-01 4.36e-15 1.0000
treatment3 4.557e-16 2.000e-01 2.28e-15 1.0000
Regards Knut
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