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Source Code for Module fuzzy.fuzzify.Dict

 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  """Fuzzification which sets adjectives values according the values in given dictionary.""" 
20   
21  __revision__ = "$Id: Dict.py,v 1.8 2010-10-29 19:24:41 rliebscher Exp $" 
22   
23  from fuzzy.fuzzify.Base import Base 
24   
25   
26 -class Dict(Base): # pylint: disable=R0903 
27      """Fuzzification method which gets adjective memberships 
28         in a dictionary instead of values to fuzzify. 
29         You should use in the adjectives instances of Set itself. 
30   
31         Q : What can be done with this? 
32   
33         A : Break complexity, by divide big and heavy fuzzy 
34         systems into small ones :: 
35   
36          input1 ----> ******* 
37          input2 ----> * FIS * 
38          input3 ----> *     * ------> output 
39          input4 ----> ******* 
40   
41         should be:: 
42   
43          input1 ----> ******* 
44          input2 ----> *FIS 1* ----+ 
45                       *******     | 
46                                   +--> ******* 
47          input3 ----> ******* -------> *FIS 3* ----> output 
48          input4 ----> *FIS 2*          ******* 
49                       ******* 
50    
51         Q : Why don't defuzzify outputs of FIS1 and FIS2 ? 
52   
53         A : Defuzzification mean data loss. 
54   
55        """ 
56   
57 -    def __init__(self, *args, **keywords): 
58          super(Dict, self).__init__(*args, **keywords) 
59   
60 -    def setValue(self, variable, value): 
61          """Do not let adjectives calculate their membership values. 
62             Instead use the provided values from dictionary. 
63              
64             @param variable: variable which adjective to set 
65             @type variable: L{fuzzy.Variable.Variable} 
66             @param variable: values to set the adjectives 
67             @type: dict 
68             """ 
69          for adjective_key in value: 
70              variable.adjectives[adjective_key].membership = value[adjective_key] 
71          return None 
72   

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