X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;f=octave_packages%2Fnan-2.5.5%2Ftrimean.m;fp=octave_packages%2Fnan-2.5.5%2Ftrimean.m;h=fe910fd055ae08c99f792c3c06f359f21129dbe0;hb=c880e8788dfc484bf23ce13fa2787f2c6bca4863;hp=0000000000000000000000000000000000000000;hpb=1705066eceaaea976f010f669ce8e972f3734b05;p=CreaPhase.git
diff --git a/octave_packages/nan-2.5.5/trimean.m b/octave_packages/nan-2.5.5/trimean.m
new file mode 100644
index 0000000..fe910fd
--- /dev/null
+++ b/octave_packages/nan-2.5.5/trimean.m
@@ -0,0 +1,79 @@
+function y=trimean(x,DIM)
+% TRIMEAN yields the weighted mean of the median and the quartiles
+% m = TRIMEAN(y).
+%
+% The trimean is m = (Q1+2*MED+Q3)/4
+% with quartile Q1 and Q3 and median MED
+%
+% N-dimensional data is supported
+%
+% REFERENCES:
+% [1] http://mathworld.wolfram.com/Trimean.html
+
+
+% 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 .
+
+% $Id: trimean.m 9601 2012-02-09 14:14:36Z schloegl $
+% Copyright (C) 1996-2003,2009,2010 by Alois Schloegl
+% This function is part of the NaN-toolbox
+% http://pub.ist.ac.at/~schloegl/matlab/NaN/
+
+global FLAG_NANS_OCCURED;
+
+% check dimension
+sz=size(x);
+
+% find the dimension
+if nargin==1,
+ DIM = find(size(x)>1,1);
+ if isempty(DIM), DIM=1; end;
+end;
+
+if DIM>length(sz),
+ sz = [sz,ones(1,DIM-length(sz))];
+end;
+
+D1 = prod(sz(1:DIM-1));
+D2 = sz(DIM);
+D3 = prod(sz(DIM+1:length(sz)));
+D0 = [sz(1:DIM-1),1,sz(DIM+1:length(sz))];
+y = repmat(nan,D0);
+q = repmat(nan,3,1);
+for k = 0:D1-1,
+for l = 0:D3-1,
+ xi = k + l * D1*sz(DIM) + 1 ;
+ xo = k + l * D1 + 1;
+ t = x(xi+(0:sz(DIM)-1)*D1);
+ t = sort(t(~isnan(t)));
+ t = t(:);
+ n = length(t);
+ if (n