X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?p=CreaPhase.git;a=blobdiff_plain;f=octave_packages%2Fnan-2.5.5%2Frankcorr.m;fp=octave_packages%2Fnan-2.5.5%2Frankcorr.m;h=74327d3332e8af3c579d286edf66ca2f3b78e999;hp=0000000000000000000000000000000000000000;hb=c880e8788dfc484bf23ce13fa2787f2c6bca4863;hpb=1705066eceaaea976f010f669ce8e972f3734b05

diff --git a/octave_packages/nan-2.5.5/rankcorr.m b/octave_packages/nan-2.5.5/rankcorr.m
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+function r = rankcorr(X,Y)
+% RANKCORR calculated the rank correlation coefficient.
+% This function is replaced by CORRCOEF. 
+% Significance test and confidence intervals can be obtained from CORRCOEF, too. 
+%
+% R = CORRCOEF(X, [Y, ] 'Rank');
+%
+% The rank correlation   r = corrcoef(ranks(x)). 
+% is often confused with Spearman's rank correlation.  
+% Spearman's correlation is defined as 
+%   r(x,y) = 1-6*sum((ranks(x)-ranks(y)).^2)/(N*(N*N-1))
+% The results are different. Here, the former version is implemented. 
+%
+% see also: CORRCOEF, SPEARMAN, RANKS
+%
+% REFERENCES:
+% [1] http://mathworld.wolfram.com/SpearmanRankCorrelationCoefficient.html
+% [2] http://mathworld.wolfram.com/CorrelationCoefficient.html
+
+%    $Id: rankcorr.m 8223 2011-04-20 09:16:06Z schloegl $
+%    Copyright (C) 2000-2003 by Alois Schloegl <alois.schloegl@gmail.com>	
+%    This function is part of the NaN-toolbox
+%       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 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/>.
+
+
+% warning('RANKCORR might become obsolete; use CORRCOEF(ranks(x)) or CORRCOEF(...,''Rank'') instead');
+
+if nargin < 2
+        r = corrcoef(ranks(X));
+else
+        r = corrcoef(ranks(X),ranks(Y));
+end
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