tile.tree {tree}R Documentation

Add Class Barplots to a Classification Tree Plot

Description

The computes a the frequencies of level of var for cases reaching each leaf of the tree, and pltos of barchart 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 repsonse 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 barplots.

Value

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

Author(s)

B. D. Ripley

See Also

tree.screens

Examples

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

[Package Contents]