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: cartsplit dispcarttree grcarttree grcart2

Quantlet: grcarttree
Description: Plots the regression tree of CART in a display

Reference(s):

Link:
Usage: {g, gp} = grcarttree(ts,stri)
Input:
cs list of vectors: data structure which represents a binary tree and is produced by cartsplit procedure, contains vectors .. cs.val, cs.vec, cs.mean, cs.ssr, cs.nelem. See cartsplit for the description of cs.
stri string: optional argument, either missing, "nelem", "ssr" or "mean".
Output:
g CART tree
gp text labels for CART tree

Note:

Example:

; loads the library xclust

library ("xclust")

; generate an artifcal dataset

x1=#(0,0,0,0,1,1,1,1,1,2)

x2=#(0,0,0,0,0,0,0,1,1,1)

x=x1~x2

y=#(0,0,0,0,100,100,100,120,120,120)

; run CART on our data

cs=cartsplit(x,y,#(0,1))

; plot CART tree

d = createdisplay(1,1)

{g, gp} = grcarttree (cs)

show (d, 1, 1, g, gp)

Result:

shows the tree with the splitting rules


Library: xclust
See also: cartsplit dispcarttree grcarttree grcart2

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

Author: 1999 Jussi Klemelae, 2000-04-15, Sigbert Klinke
(C) MD*TECH Method and Data Technologies, 21.9.2000