Returns for tree intree, an Nx1 vector sub, where the elements corresponding to a sub-tree defined by its starting node inode are 1, and all other elements are 0. An optional output subtree is a structure containing the tree structure corresponding to the sub-tree.

TREES

Example:

>> [sub subtree] = sub_tree (sample2_tree, 5)

[0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0]'

>> sum (sub)  → number of child nodes of node #5

5

>> find (sub)  → indices of nodes in the sub-tree

[5, 6, 7, 8, 9]

>> subtree  → tree structure corresponding to sub-tree

dA: [5x5 double]
X: [5x1 double]
Y: [5x1 double]
etc..

>> resttree = delete_tree (sample2_tree, find(sub))

dA: [10x10 double]  → original tree structure without the sub-tree
X: [10x1 double]
Y: [10x1 double]
etc..

TREES

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