rpart (version 1.0-6)

printcp: 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