Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / nan-2.5.5 / meansq.m

diff --git a/octave_packages/nan-2.5.5/meansq.m b/octave_packages/nan-2.5.5/meansq.m
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+++ b/octave_packages/nan-2.5.5/meansq.m
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+function o=meansq(x,DIM,W)
+% MEANSQ calculates the mean of the squares
+%
+% y = meansq(x,DIM,W)
+%
+% DIM  dimension
+%      1 STD of columns
+%      2 STD of rows
+%      N STD of  N-th dimension 
+%      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: SUMSQ, SUMSKIPNAN, MEAN, VAR, STD, RMS
+
+%    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/>.
+
+%      Copyright (C) 2000-2003,2009 by Alois Schloegl <alois.schloegl@gmail.com>       
+%      $Id: meansq.m 8223 2011-04-20 09:16:06Z schloegl $
+%       This function is part of the NaN-toolbox for Octave and Matlab 
+%       http://pub.ist.ac.at/~schloegl/matlab/NaN/
+
+
+if nargin<3,
+       W = [];
+end;   
+if nargin<2,
+       [o,N,ssq] = sumskipnan(x,[],W);
+else
+       [o,N,ssq] = sumskipnan(x,DIM,W);
+end;
+
+o = ssq./N;
+
+