
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
).
prune(tree, ...)# S3 method for rpart
prune(tree, cp, ...)
A new rpart
object that is trimmed to the value cp
.
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.
Complexity parameter to which the rpart
object will be trimmed.
further arguments passed to or from other methods.
rpart
z.auto <- rpart(Mileage ~ Weight, car.test.frame)
zp <- prune(z.auto, cp = 0.1)
plot(zp) #plot smaller rpart object
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