fuzzy.complement.Yager

Source Code for Module fuzzy.complement.Yager

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 """Complement after Yager""" 19 __revision__ = "$Id: Yager.py,v 1.7 2010-03-28 18:39:02 rliebscher Exp $" 20 21 from fuzzy.complement.Parametric import Parametric 22 from fuzzy.utils import inf_p 23

24 -class Yager(Parametric):

25 """Complement after Yager""" 26 27 _range = [ (0., inf_p) ] 28

29 - def __init__(self, omega=1., *args, **keywords):

30 """Initialize instance with given parameter 31 @param omega: The parameter 32 @type omega: float 33 """ 34 super(Yager, self).__init__(omega, *args, **keywords)

35

36 - def __call__(self, value):

37 """calculate the complement of the value 38 @param value: the value to complement 39 @type value: float 40 @return: the complemented value 41 @rtype: float 42 """ 43 return pow(1. - pow(float(value), self.p), 1. / self.p)

44

45 - def __repr__(self):

46 """Return representation of instance. 47 48 @return: representation of instance 49 @rtype: string 50 """ 51 return "%s.%s(omega=%s)" % (self.__class__.__module__, self.__class__.__name__, self.p)

52