istnode
Terminal nodes indices test
Syntax
R = istnode(T,N)
Description
istnode is a tree-management
utility.
R = istnode(T,N) returns ranks (in left
to right terminal nodes ordering) for terminal nodes N belonging
to 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 Inde
% (see the plot function)x.
% Find terminal nodes and return indices for terminal
% nodes in the tree.
istnode(t,[14])
ans =
6
istnode(t,[15])
ans =
0
istnode(t,[1;7;14;25])
ans =
0
1
6
0
istnode(t,[1 0;3 1;4 5])
ans =
0
2
0
Introduced before R2006a