ht01.twoclass {HandTill2001}

Example Data for Binary Classes

Description

Binary class data and probability predictions thereof.

Format

A data frame with 189 observations on the following 2 variables.

observed

a numeric vector

predicted

a numeric vector

Details

Binary 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.

Source

 ## From: A binary 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") 

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)