labels.rpart {rpart} | R Documentation

## Create Split Labels For an Rpart Object

### Description

This function provides labels for the branches of an `rpart` tree.

### Usage

    ## S3 method for class 'rpart':
    labels(object, digits=4, minlength=1, pretty, collapse=TRUE, ...)

### 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` | the number of digits to be used for numeric values. All of the `rpart` functions that call labels explicitly set this value, with `options("digits")` as the default.
`minlength` | the minimum length for abbreviation of character or factor variables. If 0 no abbreviation is done; if 1 then single letters are used with `"a"` for the first level, `"b"` for the second and so on. If the value is greater than 1, the `abbreviate` function is used.
`pretty` | an argument included for backwards compatibility: `pretty=0` implies `minlength=0`, `pretty=NULL` implies `minlength=1`, and `pretty=TRUE` implies `minlength=4`.

`collapse`

logical. The returned set of labels is always of the same length as the number of nodes in the tree. If `collapse=TRUE` (default), the returned value is a vector of labels for the branch leading into each node, with `"root"` as the label for the top node. If `FALSE`, the returned value is a two column matrix of labels for the left and right branches leading out from each node, with `"leaf"` as the branch labels for terminal nodes.

`...` | optional arguments to `abbreviate`.

### Value

Vector of split labels (`collapse=TRUE`) or matrix of left and right splits (`collapse=FALSE`) for the supplied `rpart` object. This function is called by printing methods for `rpart` and is not intended to be called directly by the users.

### See Also

`abbreviate`

[Package rpart version 3.1-20 Index]