isnode (Wavelet Toolbox)

True for existing node.

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 structure 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 i-th node and N(i,2) is the position of 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 = maketree(ord,3);    % binary tree of depth 3. 
    tt = nodejoin(t,5); 
    tt = nodejoin(tt,4); 
    plottree(tt)




% Check node index. 
    isnode(tt,[1;3;25])
ans =
    1 
    1 
    0

% Check node depth-position. 
    isnode(tt,[1 0;3 1;4 5])
ans =
    1 
    1 
    0