--- /dev/null
+function [o] = nanmean(i,DIM)
+% NANMEAN same as SUM but ignores NaN's.
+% NANMEAN is OBSOLETE; use MEAN instead. NANMEAN is included
+% to provide backward compatibility
+%
+% Y = nanmean(x [,DIM])
+%
+% DIM dimension
+% 1 sum of columns
+% 2 sum of rows
+% default or []: first DIMENSION with more than 1 element
+% Y resulting mean
+%
+%
+% see also: MEAN, SUMSKIPNAN, NANSUM
+
+% $Id: nanmean.m 8223 2011-04-20 09:16:06Z schloegl $
+% Copyright (C) 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
+ [o,n] = sumskipnan(i,DIM);
+else
+ [o,n] = sumskipnan(i);
+end;
+o=o./n;