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diff --git a/octave_packages/nan-2.5.5/flag_implicit_significance.m b/octave_packages/nan-2.5.5/flag_implicit_significance.m
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+++ b/octave_packages/nan-2.5.5/flag_implicit_significance.m
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+function alpha=flag_implicit_significance(i)
+% The use of FLAG_IMPLICIT_SIGNIFICANCE is in experimental state. 
+% flag_implicit_significance might even become obsolete.
+%
+% FLAG_IMPLICIT_SIGNIFICANCE sets and gets default alpha (level) of any significance test
+% The default alpha-level is stored in the global variable FLAG_implicit_significance
+% The idea is that the significance must not be assigned explicitely. 
+% This might yield more readable code. 
+%
+% Choose alpha low enough, because in alpha*100% of the cases, you will 
+% reject the Null hypothesis just by change. For this reason, the default
+% alpha is 0.01. 
+% 
+%   flag_implicit_significance(0.01) 
+%	sets the alpha-level for the significance test
+% 
+% alpha = flag_implicit_significance()
+% 	gets default alpha
+%
+% flag_implicit_significance(alpha)
+% 	sets default alpha-level
+%
+% alpha = flag_implicit_significance(alpha)
+%	gets and sets alpha 
+%
+% features:
+% - compatible to Matlab and Octave
+%
+% see also: CORRCOEF, PARTCORRCOEF
+
+%	$Id: flag_implicit_significance.m 8223 2011-04-20 09:16:06Z schloegl $
+%	Copyright (C) 2000-2002,2009,2010 by Alois Schloegl <alois.schloegl@gmail.com>	
+%       This function is part of the NaN-toolbox
+%       http://pub.ist.ac.at/~schloegl/matlab/NaN/
+%
+%    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 3 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/>.
+
+
+persistent FLAG_implicit_significance;
+DEFAULT_ALPHA = 0.01;
+
+%%% check whether FLAG was already defined 
+if ~exist('FLAG_implicit_significance','var'),
+	FLAG_implicit_significance = DEFAULT_ALPHA;  % default value 
+end;
+if isempty(FLAG_implicit_significance),
+	FLAG_implicit_significance = DEFAULT_ALPHA;  % default value 
+end;
+
+if nargin>0,
+        fprintf(2,'Warning: flag_implicit_significance is in an experimental state\n');
+        fprintf(2,'It might become obsolete.\n');
+        FLAG_implicit_significance = i; 
+end;
+
+alpha = FLAG_implicit_significance;