R: Summarize a Fitted Rpart Object

summary.rpart {rpart} | R Documentation

## Summarize a Fitted Rpart Object

### Description

Returns a detailed listing of a fitted `rpart` object.

### Usage

    ## S3 method for class 'rpart'
    summary(object, cp = 0, digits = getOption("digits"), file, ...)

### Arguments

`object` | 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` | Number of significant digits to be used in the result.
`cp` | trim nodes with a complexity of less than `cp` from the listing.
`file` | write the output to a given file name. (Full listings of a tree are often quite long).
`...` | arguments to be passed to or from other methods.

### Details

This function is a method for the generic function summary for class `"rpart"`. It can be invoked by calling `summary` for an object of the appropriate class, or directly by calling `summary.rpart` regardless of the class of the object.

It prints the call, the table shown by `printcp`, the variable importance (summing to 100) and details for each node (the details depending on the type of tree).

### See Also

`summary`, `rpart.object`, `printcp`.

### Examples

    ## a regression tree
    z.auto <- rpart(Mileage ~ Weight, car.test.frame)
    summary(z.auto)

    ## a classification tree with multiple variables and surrogate splits.
    summary(rpart(Kyphosis ~ Age + Number + Start, data = kyphosis))

[Package rpart version 4.1-15 Index]