tree: tile.tree – R documentation

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tile.tree

Add Class Barcharts to a Classification Tree Plot

Description

This computes the frequencies of level of var for cases reaching each leaf of the tree, and plots barcharts of the set of frequencies underneath each leaf.

Usage

tile.tree(tree, var, screen.arg = ascr + 1, axes = TRUE)

Arguments

`tree`	fitted object of class `"tree"`.
`var`	a factor variable to be displayed: by default it is the response factor of the tree.
`screen.arg`	The screen to be used: default the next after the currently active screen.
`axes`	logical flag for drawing of axes for the barcharts.

Value

A matrix of counts of categories (rows) for each leaf (columns). The principal effect is the plot.

Author(s)

B. D. Ripley

Examples

data(fgl, package="MASS")
fgl.tr <- tree(type ~ ., fgl)
summary(fgl.tr)
plot(fgl.tr);  text(fgl.tr, all=TRUE, cex=0.5)
fgl.tr1 <- snip.tree(fgl.tr, node=c(108, 31, 26))
tree.screens()
plot(fgl.tr1)
text(fgl.tr1)
tile.tree(fgl.tr1, fgl$type)
close.screen(all = TRUE)

tree

Classification and Regression Trees

v1.0-40

GPL-2 | GPL-3

Authors

Brian Ripley [aut, cre]

Initial release

2019-03-01