ind2depo

R2026b

Node index to node depth-position

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    Syntax

    [d,p] = ind2depo(ord,n)

    Description

    ind2depo is a tree-management utility.

    [d,p] = ind2depo(ord,n) returns, for a tree of order ord, the depths d and positions p (at those depths) for the nodes with indices n.

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

    example

    Examples

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    Open Live Script

    Create a binary wavelet packet tree with three levels.

    Ord = 2;
Lev = 3;
T = ntree(Ord,Lev);

    Plot the tree.

    plot(T)

    Figure contains an axes object and an object of type uimenu. The axes object with title Tree Decomposition contains 29 objects of type line, text.

    Use the allnodes function to obtain the indices of the nodes in linear order.

    idx = allnodes(T);

    Convert the indices to depth-position format.

    [depth,pos] = ind2depo(Ord,idx);
table(idx,depth,pos)
    ans = 15×3 table
    idx    depth    pos
    ___    _____    ___

     0       0       0 
     1       1       0 
     2       1       1 
     3       2       0 
     4       2       1 
     5       2       2 
     6       2       3 
     7       3       0 
     8       3       1 
     9       3       2 
    10       3       3 
    11       3       4 
    12       3       5 
    13       3       6 
    14       3       7

    Input Arguments

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    Order of a tree, specified as a positive integer.

    Example: A binary tree is a tree of order 2.

    Node indices, specified as a column vector with nonnegative integer entries.

    Output Arguments

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    Depths and positions (at those depths) for the nodes with indices n, returned as a pair of column vectors with nonnegative integer entries.

    The values of the depths D and positions N are such that 0≤D and 0≤ P ≤ ordD-1.

    Note

    If n is a M-by-2 matrix, we have ind2depo(ord,n) = [n(:,1),n(:,2)].

    Extended Capabilities

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    Version History

    Introduced before R2006a

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    See Also