Add Class Barplots to a Classification Tree Plot
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.
|
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.Value
A matrix of counts of categories (rows) fora each leaf (columns). The
principal effect is the plot.Author(s)
B. D. RipleySee Also
tree.screens
Examples
library(MASS)
library(tree)
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)