birthwt {MASS} | R Documentation |
The birthwt
data frame has 189 rows and 10 columns.
The data were collected at Baystate Medical Center, Springfield, Mass
during 1986.
birthwt
This data frame contains the following columns:
low
age
lwt
race
1
= white, 2
= black, 3
= other)
smoke
ptl
ht
ui
ftv
bwt
Hosmer, D.W. and Lemeshow, S. (1989) Applied Logistic Regression. New York: Wiley
Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.
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") options(contrasts = c("contr.treatment", "contr.poly")) glm(low ~ ., binomial, bwt)