HandTill2001 (version 0.2-9)

ht01.twoclass: ht01.twoclass data in Package HandTill2001

Description

two class data and probability predictions thereof.

Usage

data(ht01.twoclass)

source

## From: A two class data example Venables and Ripley pp. 194--199 library(MASS); data("birthwt"); 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 ~ ., family=binomial(link=logit), data=bwt) birthwt.step2 <- stepAIC(birthwt.glm, ~ .^2 + I(scale(age)^2) + I(scale(lwt)^2), trace = F ) ht01.twoclass <- data.frame(observed = bwt$low , predicted = predict(birthwt.step2 , type = "response")) write.table(ht01.twoclass, file = "ht01.twoclass.txt")

Details

two class data ('observed': MASS::birthwt$low) and probability predictions

(predict(birthwt.step2, type = "response"), cf. Venables and Ripley (2002), pp. 195f and Source) from stats::glm.

References

Venables, W. N and Ripley, B. D. (2002), Modern Applied Statistics with S (4th edition). Springer, ISBN 0-387-95457-0

Examples

library(HandTill2001)
data(ht01.twoclass)
str(ht01.twoclass)