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: histo4.m
    path of file: ./repos/malini/Codes/FC_EC_calculation code/DynamicEC/tsa
    
    the code of the file until where you have to start completion: function [R,tix]=histo4(Y)
% HISTO4 calculates histogram for rows and supports data compression
%
% R = HISTO4(Y)
% 	R is a struct with th fields 
%       R.X  are the bin-values 
%       R.H  is the frequency of occurence of value X 
%  	R.N  are the number of samples 
%
% HISTO4 might be useful for data compression, because
% [R,tix] = histo4(Y) 
%     	is the compression step
% R.X(tix,:) 
%  	is the decompression step
%
% The effort (in memory and speed) for compression is O(n*log(n))
% The effort (in memory and speed) for decompression is only O(n)
% 
% see also: HISTO, HISTO2, HISTO3, HISTO4
%
% REFERENCE(S):
%  C.E. Shannon and W. Weaver "The mathematical theory of communication" University of Illinois Press, Urbana 1949 (reprint 1963).


    
function [R,tix]=histo4(Y)
% HISTO4 calculates histogram for rows and supports data compression
%
% R = HISTO4(Y)
% 	R is a struct with th fields 
%       R.X  are the bin-values 
%       R.H  is the frequency of occurence of value X 
%  	R.N  are the number of samples 
%
% HISTO4 might be useful for data compression, because
% [R,tix] = histo4(Y) 
%     	is the compression step
% R.X(tix,:) 
%  	is the decompression step
%
% The effort (in memory and speed) for compression is O(n*log(n))
% The effort (in memory and speed) for decompression is only O(n)
% 
% see also: HISTO, HISTO2, HISTO3, HISTO4
%
% REFERENCE(S):
%  C.E. Shannon and W. Weaver "The mathematical theory of communication" University of Illinois Press, Urbana 1949 (reprint 1963).


%	$Id: histo4.m 5090 2008-06-05 08:12:04Z schloegl $
%	Copyright (C) 1996-2005,2008 by Alois Schloegl <a.schloegl@ieee.org>	
%    	This is part of the TSA-toolbox 
%	http://hci.tugraz.at/~schloegl/matlab/tsa/
%
%    This program is free software: you can redistribute it and/or modify
%    it under the terms of the GNU General Public License as published by
%    the Free Software Foundation, either version 3 of the License, or
%    (at your option) any later version.
%
%    This program is distributed in the hope that it will be useful,
%    but WITHOUT ANY WARRANTY; without even the implied warranty of
%    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
%    GNU General Public License for more details.
%
%    You should have received a copy of the GNU General Public License
%    along with this program.  If not, see <http://www.gnu.org/licenses/>.


[yr, yc] = size(Y);
if yr==1,
        % Makes sure there is a second row
        % Sort does not support the DIM-argument, therefore,
        % this function would not work correctly with this software
        % Once this is fixed, this part can be removed. 
        Y = [Y; NaN+ones(size(Y))];  
end