rpart: meanvar.rpart – R documentation

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meanvar.rpart

Mean-Variance Plot for an Rpart Object

Description

Creates a plot on the current graphics device of the deviance of the node divided by the number of observations at the node. Also returns the node number.

Usage

meanvar(tree, ...)

## S3 method for class 'rpart'
meanvar(tree, xlab = "ave(y)", ylab = "ave(deviance)", ...)

Arguments

`tree`	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.
`xlab`	x-axis label for the plot.
`ylab`	y-axis label for the plot.
`...`	additional graphical parameters may be supplied as arguments to this function.

Value

an invisible list containing the following vectors is returned.

`x`	fitted value at terminal nodes (`yval`).
`y`	deviance of node divided by number of observations at node.
`label`	node number.

Side Effects

a plot is put on the current graphics device.

Examples

z.auto <- rpart(Mileage ~ Weight, car.test.frame)
meanvar(z.auto, log = 'xy')

rpart

Recursive Partitioning and Regression Trees

v4.1-15

GPL-2 | GPL-3

Authors

Terry Therneau [aut], Beth Atkinson [aut, cre], Brian Ripley [trl] (producer of the initial R port, maintainer 1999-2017)

Initial release

2019-04-10