Purpose

DTREE constructor

Syntax

• T = dtree(ORD,D,X)
  T = dtree(ORD,D,X,U)
  [T,NB] = dtree(...)
  T = dtree('PropName1',PropValue1,'PropName2',PropValue2, ...)
  

Description

T = dtree(ORD,D,X) returns a complete data tree (DTREE) object of order ORD and depth D. The data associated with the tree T is X.

With T = dtree(ORD,D,X,U) you can set a user data field.

[T,NB] = dtree(...) returns also the number of terminal nodes (leaves) of T.

[T,NB] = dtree('PropName1',PropValue1,'PropName2',PropValue2,...) is the most general syntax to construct a DTREE object.

The valid choices for 'PropName' are

'order'	Order of the tree
'depth'	Depth of the tree
'data'	Data associated to the tree
'spsch'	Split scheme for nodes
'ud'	User data field

The split scheme field is an order ORD by 1 logical array. The root of the tree can be split and it has ORD children. If spsch(j) = 1, you can split the j-th child. Each node that you can split has the same property as the root node.

For more information on object fields, type help dtree/get.

Class DTREE (Parent class: NTREE)

Fields

dtree	Parent object
allNI	All nodes information
terNI	Terminal nodes information

Examples

• % Create a data tree.
  x = [1:10];
  t = dtree(3,2,x);
  t = nodejoin(t,2);
  

See Also

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drawtree

dwt

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