Cost-complexity Pruning of an Rpart Object
Usage
prune.rpart(tree, cp)
Arguments
tree
|
fitted model object of class rpart . This is assumed to be the result
of some function that produces an object with the same named
components as that returned by the rpart function.
|
cp
|
Complexity parameter to which the rpart object will be trimmed.
|
Description
Determines a nested sequence of subtrees of the supplied rpart
object
by recursively snipping
off the least important splits, based on the
complexity parameter (cp
).Value
A new rpart
object that is trimmed to the value cp
.See Also
rpart
Examples
data(car.test.frame)
z.auto <- rpart(Mileage ~ Weight, car.test.frame)
zp <- prune.rpart(z.auto)
plot(zp) #plot smaller rpart object