Displays CP table for Fitted Rpart Object
Usage
printcp(x, digits=.Options$digits - 2)
Arguments
x
|
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.
|
digits
|
the number of digits of numbers to print.
|
Details
Prints a table of optimal prunings based on a complexity parameter.See Also
summary.rpart
, rpart.object
Examples
data(car.test.frame)
z.auto <- rpart(Mileage ~ Weight, car.test.frame)
printcp(z.auto)
Regression tree:
rpart(formula = Mileage ~ Weight, data = car.test.frame)
Variables actually used in tree construction:
[1] Weight
Root node error: 1354.6/60 = 22.576
CP nsplit rel error xerror xstd
1 0.595349 0 1.00000 1.03436 0.178526
2 0.134528 1 0.40465 0.60508 0.105217
3 0.012828 2 0.27012 0.45153 0.083330
4 0.010000 3 0.25729 0.44826 0.076998