kyphosis {rpart} | R Documentation |
The kyphosis
data frame has 81 rows and 4 columns.
representing data on children who have had corrective spinal surgery
kyphosis
This data frame contains the following columns:
Kyphosis
absent
present
indicating if a kyphosis (a type of deformation)
was present after the operation.
Age
Number
Start
John M. Chambers and Trevor J. Hastie eds. (1992) Statistical Models in S, Wadsworth and Brooks/Cole, Pacific Grove, CA 1992.
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)