Wavelet Toolbox™

Existing node test

Syntax

• R = isnode(T,N) 
  

Description

isnode is a tree-management utility.

R = isnode(T,N) returns 1's for nodes N, which exist in the tree T, and 0's for others.

N can be a column vector containing the indices of nodes or a matrix, that contains the depths and positions of nodes.

In the last case, N(i,1) is the depth of the i-th node and N(i,2) is the position of the i-th node.

The nodes are numbered from left to right and from top to bottom. The root index is 0.

Examples

• % Create initial tree. 
  ord = 2; 
  t = ntree(ord,3);    % binary tree of depth 3. 
  t = nodejoin(t,5); 
  t = nodejoin(t,4); 
  plot(t)
  
  
  % Change Node Label from Depth_Position to Index
  % (see the plot function).
  
  
  % Check node index. 
  isnode(t,[1;3;25])
  
  ans =
      1 
      1 
      0
  
  % Check node Depth_Position.
  isnode(t,[1 0;3 1;4 5])
  
  ans =
      1 
      1 
      0
  

See Also
istnode, wtreemgr

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