R: Add Class Barcharts to a Classification Tree Plot

tile.tree {tree} | R Documentation

## 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

### See Also

`tree.screens`

### 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)

[Package tree version 1.0-39 Index]