allnodes

R2026b

Tree nodes

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    Syntax

    N = allnodes(T)
    N = allnodes(T,"deppos")

    Description

    allnodes is a tree management utility that returns one of two node descriptions: either indices, or depths and positions.

    N = allnodes(T) returns the indices of all the nodes of the tree T.

    N = allnodes(T,"deppos") returns the depths and positions of all the nodes of the tree T.

    example

    Examples

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    Open Live Script

    This example shows how to obtain the depth-position and linear indices of a wavelet packet tree.

    Load the noisy Doppler signal and obtain the wavelet packet decomposition down to the level 4 using the db2 wavelet.

    load noisdopp
T = wpdec(noisdopp,4,"db2");

    Obtain the depth-position indices.

    DepthPosition = allnodes(T,"deppos");

    Obtain the corresponding linear indices.

    LinearIndices = allnodes(T);

    Display the correspondence in a table.

    table(DepthPosition,LinearIndices)
    ans = 31×2 table
    DepthPosition    LinearIndices
    _____________    _____________

       0    0              0      
       1    0              1      
       1    1              2      
       2    0              3      
       2    1              4      
       2    2              5      
       2    3              6      
       3    0              7      
       3    1              8      
       3    2              9      
       3    3             10      
       3    4             11      
       3    5             12      
       3    6             13      
       3    7             14      
       4    0             15      
      ⋮

    Input Arguments

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    Tree, specified as a ntree, dtree, or wptree object.

    Output Arguments

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    Node description, returned as a column vector or matrix. The nodes are numbered from left to right and top to bottom. The root index is 0.

    • If N = allnodes(T), N is a K-by-1 column vector, where K is the number of nodes in the tree. N(i) is the index of the ith node.

    • If N = allnodes(T,"deppos"), N is a K-by-2 matrix. N(i,1) is the depth and N(i,2) is the position of the ith node.

    Extended Capabilities

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    Version History

    Introduced before R2006a

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    See Also

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