prune.arbor
Cost-complexity Pruning of an Arbor Object
Description
Determines a nested sequence of subtrees of the supplied arbor object
by recursively snipping off the least important splits, based on the
complexity parameter (cp).
Usage
prune(tree, ...)
Arguments
| tree |
fitted model object of class arbor. This is assumed to be the result
of some function that produces an object with the same named
components as that returned by the arbor function.
|
| ... |
additional arguments.
|
Value
returns a new arbor object that is trimmed to the value cp.
See Also
Examples
library("arbor")
data(car.test.frame, package = "Sdatasets")
z.auto <- arbor(Mileage ~ Weight, car.test.frame)
zp <- prune.arbor(z.auto, cp = 0.03)
z.auto
zp