Package fuzzy :: Package norm :: Module SchweizerIntersection
Source Code for Module fuzzy.norm.SchweizerIntersection

 1  # -*- coding: utf-8 -*- 
 2  # 
 3  # Copyright (C) 2009  Rene Liebscher 
 4  # 
 5  # This program is free software; you can redistribute it and/or modify it under 
 6  # the terms of the GNU Lesser General Public License as published by the Free  
 7  # Software Foundation; either version 3 of the License, or (at your option) any 
 8  # later version. 
 9  # 
10  # This program is distributed in the hope that it will be useful, but WITHOUT  
11  # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 
12  # FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more 
13  # details. 
14  #  
15  # You should have received a copy of the GNU Lesser General Public License 
16  # along with this program; if not, see <http://www.gnu.org/licenses/>.  
17  # 
18   
19  __revision__ = "$Id: SchweizerIntersection.py,v 1.8 2009-10-27 20:06:27 rliebscher Exp $" 
20   
21  from fuzzy.norm.ParametricNorm import ParametricNorm 
22  from fuzzy.utils import inf_p 
23   
24 -class SchweizerIntersection(ParametricNorm): 
25   
26      _range = [ (0.,inf_p) ] 
27   
28 -    def __init__(self, param=1.): 
29          super(SchweizerIntersection, self).__init__(ParametricNorm.T_NORM, param) 
30   
31 -    def __call__(self, *args): 
32          x, y = self.checkArgs2(args) 
33          p = self.p 
34          return pow(max(0.0,pow(x,p)+pow(y,p)-1.0),1.0/p) 
35