You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: vl_hikmeanshist.m
    path of file: ./repos/robotic_perception/Trafic_Sign_Recognition/code/vlfeat-0.9.20-bin/vlfeat-0.9.20/toolbox/kmeans
    
    the code of the file until where you have to start completion: function h = vl_hikmeanshist(tree,path)
% VL_HIKMEANSHIST  Compute histogram of quantized data
%  H = VL_HIKMEANSHIST(TREE,PATH) computes the histogram of the HIKM tree
%  nodes activated by the root-to-leaf paths PATH. PATH is usually
%  obtained by quantizing data by means of VL_HIKMEANSPUSH().
%
%  The histogram H has one bin for each node of the HIKM tree TREE.
%  The tree has K = TREE.K nodes and depth D = TREE.DEPTH.  Therefore
%  there are M = (K^(D+1) - 1) / (K - 1) nodes in the tree (not
%  counting the root which carries no information). Nodes are stacked
%  into a vector of bins in breadth first order.
%

    
function h = vl_hikmeanshist(tree,path)
% VL_HIKMEANSHIST  Compute histogram of quantized data
%  H = VL_HIKMEANSHIST(TREE,PATH) computes the histogram of the HIKM tree
%  nodes activated by the root-to-leaf paths PATH. PATH is usually
%  obtained by quantizing data by means of VL_HIKMEANSPUSH().
%
%  The histogram H has one bin for each node of the HIKM tree TREE.
%  The tree has K = TREE.K nodes and depth D = TREE.DEPTH.  Therefore
%  there are M = (K^(D+1) - 1) / (K - 1) nodes in the tree (not
%  counting the root which carries no information). Nodes are stacked
%  into a vector of bins in breadth first order.
%
%  Example::
%    The following relations illustrate the structure of PATH:
%      H(1)   = # of paths such that PATH(1,:) = 1
%      H(K)   = # of paths such that PATH(1,:) = K
%      H(K+1) = # of paths such that PATH(1:2,:) = [1 ; 1]
%      H(K+K) = # of paths such that PATH(1:2,:) = [1 ; K]
%
%  See also: VL_HIKMEANS(), VL_HIKMEANSPUSH(), VL_HELP().

% Copyright (C) 2007-12 Andrea Vedaldi and Brian Fulkerson.
% All rights reserved.
%
% This file is part of the VLFeat library and is made available under
% the terms of the BSD license (see the COPYING file).

% PATH(:,k) is colum of subscripts i1 i2 ... id identifying a path in
% the tree. In a bread first enumeration of the tree nodes (starting
% from one and not counting the root), the node of subscripts
% i1,i2,...id has index
%
% idx = i1 K^{d-1} + i2 K^{d-2} + ... + id
%
% where we assumed the indeces i1,i2,... start from 1. This formula
% can be easily computed recursively. Since we also have a root
% node, we need to add one.

K = tree.K ;
D = tree.depth ;
M = (K^(D+1) - 1) / (K - 1) ;

h = zeros(M, 1) ;
p = zeros(1,size(path,2)) ;

h(1) = size(path,2) ;

for d=1:D
  p = p * K + double(path(d,:))  ;
  h = vl_binsum(h, 1, p + 1) ;
end