/usr/share/octave/packages/tsa-4.2.7/histo.m is in octave-tsa 4.2.7-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 | function [H,X]=histo(Y,Mode)
% HISTO calculates histogram for each column
% [H,X] = HISTO(Y,Mode)
%
% Mode
% 'rows' : frequency of each row
% '1x' : single bin-values
% 'nx' : separate bin-values for each column
% X are the bin-values
% H is the frequency of occurence of value X
%
% HISTO(Y) with no output arguments:
% plots the histogram bar(X,H)
%
% more histogram-based results can be obtained by HIST2RES2
%
% 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: histo.m 11693 2013-03-04 06:40:14Z schloegl $
% Copyright (C) 1996-2002,2008 by Alois Schloegl <a.schloegl@ieee.org>
% This is part of the TSA-toolbox
% http://pub.ist.ac.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/>.
if nargin<2,
Mode='1x';
end;
Mode=lower(Mode);
if strcmp(Mode,'rows')
R = histo4(Y);
elseif strcmp(Mode,'column')
R = histo4(Y');
R.X = R.X';
elseif strcmp(Mode,'1x')
R = histo3(Y);
elseif strcmp(Mode,'nx')
R = histo2(Y);
end;
H = R.H;
X = R.X;
if nargout == 0,
if any(size(X)==1),
if exist('OCTAVE_VERSION')<5,
bar(R.X,R.H,'stacked');
else
bar(R.X,R.H);
end
else
warning('2-dim X-values not supported\n')
%bar3(R.X,R.H);
end;
end;
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