/usr/share/octave/packages/3.2/nan-2.4.4/mean.m is in octave-nan 2.4.4-1.
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 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 | function [y]=mean(x,DIM,opt,W)
% MEAN calculates the mean of data elements.
%
% y = mean(x [,DIM] [,opt] [, W])
%
% DIM dimension
% 1 MEAN of columns
% 2 MEAN of rows
% N MEAN of N-th dimension
% default or []: first DIMENSION, with more than 1 element
%
% opt options
% 'A' arithmetic mean
% 'G' geometric mean
% 'H' harmonic mean
%
% W weights to compute weighted mean (default: [])
% if W=[], all weights are 1.
% number of elements in W must match size(x,DIM)
%
% usage:
% mean(x)
% mean(x,DIM)
% mean(x,opt)
% mean(x,opt,DIM)
% mean(x,DIM,opt)
% mean(x,DIM,W)
% mean(x,DIM,opt,W); '
%
% features:
% - can deal with NaN's (missing values)
% - weighting of data
% - dimension argument also in Octave
% - compatible to Matlab and Octave
%
% see also: SUMSKIPNAN, MEAN, GEOMEAN, HARMMEAN
%
% $Id: mean.m 8223 2011-04-20 09:16:06Z schloegl $
% Copyright (C) 2000-2004,2008,2009 by Alois Schloegl <alois.schloegl@gmail.com>
% This is part of the NaN-toolbox. For more details see
% http://pub.ist.ac.at/~schloegl/matlab/NaN/
%
% 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==1,
%------ case: mean(x)
W = [];
DIM=[];
opt='a';
elseif (nargin==2)
W = [];
%if ~isnumeric(DIM), %>=65;%abs('A'),
if (DIM>64) %abs('A'),
%------ case: mean(x,opt)
opt=DIM;
DIM=[];
else
%------ case: mean(x,DIM)
opt='a';
end;
elseif (nargin == 3),
if isnumeric(DIM) && isnumeric(opt)
%------ case: mean(x,DIM,W)
W = opt;
opt='a';
elseif (DIM>64) %abs('A'),
%------ case: mean(x,opt,DIM)
%if ~isnumeric(DIM), %>=65;%abs('A'),
tmp=opt;
opt=DIM;
DIM=tmp;
W = [];
else
%------ case: mean(x,DIM,opt)
W = [];
end;
elseif nargin==4,
%------ case: mean(x,DIM,opt,W)
;
else
help mean
% fprintf(1,'usage: mean(x) or mean(x,DIM) or mean(x,opt,DIM) or mean(x,DIM,opt) or mean(x,DIM,W) or mean(x,DIM,opt,W); '
end;
if isempty(opt)
opt = 'A';
elseif any(opt=='aAgGhH')
opt = upper(opt); % eliminate old version
else
error('Error MEAN: invalid opt argument');
end;
if (opt == 'A')
[y, n] = sumskipnan(x,DIM,W);
y = y./n;
elseif (opt == 'G')
[y, n] = sumskipnan(log(x),DIM,W);
y = exp (y./n);
elseif (opt == 'H')
[y, n] = sumskipnan(1./x,DIM,W);
y = n./y;
else
fprintf (2,'mean: option `%s` not recognized', opt);
end
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