--- /dev/null
+function [o]=sumsq(x,DIM)
+% SUMSQ calculates the sum of squares.
+%
+% [y] = sumsq(x [, DIM])
+%
+% DIM dimension
+% N STD of N-th dimension
+% default or []: first DIMENSION, with more than 1 element
+%
+% y estimated standard deviation
+%
+% features:
+% - can deal with NaN's (missing values)
+% - dimension argument also in Octave
+% - compatible to Matlab and Octave
+%
+% see also: RMS, SUMSKIPNAN, MEAN, VAR, MEANSQ,
+%
+%
+% References(s):
+
+
+% 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/>.
+
+% $Id$
+% Copyright (C) 2009,2010 by Alois Schloegl <alois.schloegl@gmail.com>
+% This function is part of the NaN-toolbox
+% http://pub.ist.ac.at/~schloegl/matlab/NaN/
+
+if nargin<2,
+ DIM = [];
+end;
+if isempty(DIM),
+ DIM = find(size(x)>1,1);
+ if isempty(DIM), DIM=1; end;
+end;
+
+[s,n,o] = sumskipnan(x,DIM);
+