X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?p=CreaPhase.git;a=blobdiff_plain;f=octave_packages%2Fnan-2.5.5%2Fmeandev.m;fp=octave_packages%2Fnan-2.5.5%2Fmeandev.m;h=d095970aeabd1766ee42bc8f43a29096ea68fa0c;hp=0000000000000000000000000000000000000000;hb=f5f7a74bd8a4900f0b797da6783be80e11a68d86;hpb=1705066eceaaea976f010f669ce8e972f3734b05

diff --git a/octave_packages/nan-2.5.5/meandev.m b/octave_packages/nan-2.5.5/meandev.m
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+function R = meandev(i,DIM)
+% MEANDEV estimates the Mean deviation
+% (note that according to [1,2] this is the mean deviation; 
+% not the mean absolute deviation)
+%
+% y = meandev(x,DIM)
+%   calculates the mean deviation of x in dimension DIM
+%
+% DIM	dimension
+%	1: STATS of columns
+%	2: STATS of rows
+%	default or []: first DIMENSION, with more than 1 element
+%
+% features:
+% - can deal with NaN's (missing values)
+% - dimension argument 
+% - compatible to Matlab and Octave
+%
+% see also: SUMSKIPNAN, VAR, STD, MAD
+%
+% REFERENCE(S):
+% [1] http://mathworld.wolfram.com/MeanDeviation.html
+% [2] L. Sachs, "Applied Statistics: A Handbook of Techniques", Springer-Verlag, 1984, page 253.
+% [3] http://mathworld.wolfram.com/MeanAbsoluteDeviation.html
+% [4] Kenney, J. F. and Keeping, E. S. "Mean Absolute Deviation." §6.4 in Mathematics of Statistics, Pt. 1, 3rd ed. Princeton, NJ: Van Nostrand, pp. 76-77 1962. 
+
+%    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: meandev.m 8223 2011-04-20 09:16:06Z schloegl $
+%	Copyright (C) 2000-2002,2010 by Alois Schloegl <alois.schloegl@gmail.com>	
+%       This function is part of the NaN-toolbox for Octave and Matlab 
+%       http://pub.ist.ac.at/~schloegl/matlab/NaN/
+	
+if nargin==1,
+        DIM = find(size(i)>1,1);
+        if isempty(DIM), DIM=1; end;
+end;
+
+[S,N] = sumskipnan(i,DIM);		% sum
+i     = i - repmat(S./N,size(i)./size(S));		% remove mean
+[S,N] = sumskipnan(abs(i),DIM);		% 
+
+%if flag_implicit_unbiased_estim;    %% ------- unbiased estimates ----------- 
+    	n1 = max(N-1,0);			% in case of n=0 and n=1, the (biased) variance, STD and STE are INF
+%else
+%    	n1 = N;
+%end;
+
+R     = S./n1;
+
+