/usr/share/octave/packages/nan-2.8.1/harmmean.m is in octave-nan 2.8.1-1ubuntu2.
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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 | function [y] = harmmean(x,DIM,W)
% HARMMEAN calculates the harmonic mean of data elements.
% The harmonic mean is the inverse of the mean of the inverse elements.
%
% y = harmmean(x [,DIM [,W]]) is the same as
% y = mean(x,'H' [,DIM [,W]])
%
% DIM dimension
% 1 STD of columns
% 2 STD of rows
% default or []: first DIMENSION, with more than 1 element
% W weights to compute weighted mean (default: [])
% if W=[], all weights are 1.
% number of elements in W must match size(x,DIM)
%
% 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
%
% 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 2 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/>.
% $Id: harmmean.m 8223 2011-04-20 09:16:06Z schloegl $
% Copyright (C) 2000-2002,2009 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/
if nargin<2
DIM=min(find(size(x)>1));
if isempty(DIM), DIM=1; end;
end;
if nargin<3
W = [];
end;
[y, n] = sumskipnan(1./x,DIM,W);
y = n./y;
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