| kyphosis {rpart} | R Documentation |
The kyphosis data frame has 81 rows and 4 columns.
representing data on children who have had corrective spinal surgery
data(kyphosis)
This data frame contains the following columns:
Kyphosisabsent
present
indicating if a kyphosis (a type of deformation)
was present after the operation.
AgeNumberStartJohn M. Chambers and Trevor J. Hastie eds. (1992) Statistical Models in S, Wadsworth and Brooks/Cole, Pacific Grove, CA 1992.
data(kyphosis)
fit <- rpart(Kyphosis ~ Age + Number + Start, data=kyphosis)
fit2 <- rpart(Kyphosis ~ Age + Number + Start, data=kyphosis,
parms=list(prior=c(.65,.35), split='information'))
fit3 <- rpart(Kyphosis ~ Age + Number + Start, data=kyphosis,
control=rpart.control(cp=.05))
par(mfrow=c(1,2))
plot(fit)
text(fit, use.n=TRUE)
plot(fit2)
text(fit2, use.n=TRUE)