Wavelet Toolbox

DTREE Object

Class DTREE (Data Tree) -- Parent class: NTREE

Fields

ntree	Parent object
allNI	All Nodes Information
terNI	Terminal Nodes Information

Fields Description

allNI is a NBnodes-by-3 array such that

• allNI(N,:) = [ind,size(1,1),size(1,2)]
  
  ind = index of the node N
  
  size = size of data associated with the node N
  

terNI is a 1-by-2 cell array such that

   terNI{1} is an NB_TerminalNodes-by-2 array such that

terNI{1}(N,:) is the size of coefficients associated with the N-th terminal node. The nodes are numbered from left to right and from top to bottom. The root index is 0.

   terNI{2} is a row vector containing the previous coefficients stored
       row-wise in the above specified order.

Methods

dtree	Constructor for the class DTREE.
expand	Expand data tree.
fmdtree	Field manager for DTREE object.
nodejoin	Recompose node.
nodesplt	Split (decompose) node.
rnodcoef	Reconstruct node coefficients.
defaninf	Define node information (all nodes).
get	Get DTREE object field contents.
plot	Plot DTREE object.
read	Read values in DTREE object fields.
set	Set DTREE object field contents.
write	Write values in DTREE object fields.
merge	Merge (recompose) the data of a node.
recons	Reconstruct node coefficients.
split	Split (decompose) the data of a terminal node.

Comments

• After the constructor, the first set of methods (between line separators) might not be overloaded (or only with great care). The second set of methods can be overloaded. The third set of methods must be overloaded to recompose, reconstruct, or decompose nodes data.
• The method nodejoin calls the method merge, the method nodesplt calls the method split, and the method rnodcoef calls the method recons.
• To define nodes information, you must overload the method defaninf. For each node N, the basic information is given by

•     allNI(N,1:3): [index,size(1,1),size(1,2)];

  you can add other information by adding columns to allNI.

  See the WPTREE object method for an example.

• If the method get is not overloaded, using the DTREE get method you can get some object field contents (but not all).

For example, if T is parented by a DTREE object of order 2 and if 'Tfield' is a field of T, whose content is Tval, [a,b] = get(t,'order','Tfield') returns a = 2 and b = 'errorWTBX'. Nevertheless, using a nondocumented method you can get the right values. Namely: [a,b] = getwtbo(t,'order','Tfield') returns a = 2 and b=Tval.

NTREE Object

WPTREE Object

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