The
birthwt data frame has 189 rows and
10 columns. The data were collected at Baystate Medical Center,
Springfield, Mass during 1986.
This data frame contains the following columns:
1 = white,
2 = black,
3
= other)
Hosmer, D.W. and Lemeshow, S. (1989) Applied Logistic Regression. New York: Wiley
attach(birthwt)
race <- factor(race, labels = c("white", "black", "other"))
ptd <- factor(ptl > 0)
ftv <- factor(ftv)
levels(ftv)[-(1:2)] <- "2+"
bwt <- data.frame(low = factor(low), age, lwt, race,
smoke = (smoke>0), ptd, ht = (ht>0), ui = (ui>0), ftv)
detach("birthwt")
birthwt.glm <- glm(low ~ ., binomial, bwt)