dtree (Wavelet Toolbox)

Data trees 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 userdata 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'
: Userdata field.

'`order`'	`:` Order of the tree.
'`depth`'	`:` Depth of the tree.
'`data`'	`:` Data associated to the tree.
'`spsch`'	`:` Split scheme for nodes.
'`ud`'	`:` Userdata 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.

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
ntree, wtbo

drawtree dwt