--- /dev/null
+function [y] = geomean(x,DIM,W)
+% GEOMEAN calculates the geomentric mean of data elements.
+%
+% y = geomean(x [,DIM [,W]]) is the same as
+% y = mean(x,'G' [,DIM])
+%
+% 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, HARMMEAN
+%
+% 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/>.
+
+
+% $Id: geomean.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(log(x),DIM,W);
+y = exp (y./n);
+