```
function = geomean(x,DIM)
% GEOMEAN calculates the geomentric mean of data elements.
%
% y = geomean(x [,DIM]) 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
%
% features:
% - can deal with NaN's (missing values)
% - 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 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/>.
% Version 1.23; 07 Jun 2002
% Copyright (C) 2000-2002 by Alois Schloegl <a.schloegl@ieee.org>
if nargin<2
DIM=min(find(size(x)>1));
if isempty(DIM), DIM=1; end;
end;
[y, n] = sumskipnan(log(x),DIM);
y = exp (y./n);
```

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