XploRe Help : cartleafnum

Keywords - Function groups - @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Library:	xclust
See also:	cartsplitclass cartsplitregr

Quantlet:		cartleafnum
Description:		returns number of terminal (leaf) nodes in the tree.

Reference(s):

Breiman, L., Friedman, J., Olshen, R., and Stone, C. J.(1984): Classification and Regression Trees. Chapman & Hall, New York

Link:

http://www.xplore-stat.de/tutorials/cartstart.html

Usage:	`LeafNum = cartleafnum(Tree)`
Input:
	`Tree`	Complex tree structure, list of different parameters Tree can be generated using CartClassificationSplit or CartRegressionSplit commands
Output:
	`LeafNumber`	integer, number of terminal (leaf) nodes in the tree.

Example:

library("xclust"); x = #(1,2,3,4,40,50,60,80,90, 100, 110, 300, 500)~#(10,0,40,60,100,1,-91,20,20,34, 1, 3, -5); y = #(1,1,1,1,2,1,1,2,3,2, 3, 3, 3) // create tree tr = cartsplitclass(x, y, 0, 1) // return number of leaf nodes in the constructed tree NumberOfNodes = cartleafnum(tr); NumberOfNodes

Result:

Contents of NumberOfNodes
[1,]        6

Author: R. Timofeev, A. Andriyashin 20041215 license MD*Tech