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Source Code for Module fuzzy.set.Set

 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  """ 
20  Base class for all fuzzy sets. 
21  """ 
22   
23  __revision__ = "$Id: Set.py,v 1.24 2010-10-29 19:24:41 rliebscher Exp $" 
24   
25 -class Set(object): 
26      """Base class for all types of fuzzy sets.""" 
27   
28 -    def __call__(self, x): 
29          """Return membership of x in this fuzzy set. 
30             This method makes the set work like a function. 
31              
32             @param x: value x 
33             @type x: float 
34             @return: membership for value x 
35             @rtype: float 
36             """ 
37          return 0. 
38   
39 -    def getValuesXY(self, flat = True): 
40          """Internal helper function to help convert arbitrary fuzzy sets in  
41          fuzzy sets represented by a polygon.""" 
42          return ((x,self(x)) for x in self.getValuesX()) 
43   
44 -    def getValuesX(self): 
45          """Internal helper function to help convert arbitrary fuzzy sets in  
46          fuzzy sets represented by a polygon.""" 
47          raise NotImplementedError("Set has no values defined") 
48   
49 -    def getCOG(self): 
50          """Returns center of gravity. 
51              
52             @return: x-value of center of gravity 
53             @rtype: float 
54             """ 
55          raise NotImplementedError("abstract class %s has no center of gravity." % self.__class__.__name__) 
56   
57 -    def __repr__(self): 
58          """Return representation of instance. 
59                      
60             @return: representation of instance 
61             @rtype: string 
62             """ 
63          return "%s.%s()" % (self.__class__.__module__, self.__class__.__name__) 
64   
65  # pylint: disable=W0611 
66  # too make old code happy 
67  from fuzzy.set.operations import norm,merge #@UnusedImport 
68   

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