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fuzzy_set.bmx
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fuzzy_set.bmx
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Rem
Copyright (c) 2010 Christiaan Kras
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
End Rem
Rem
bbdoc: class to define an interface for a fuzzy set
End Rem
Type TFuzzySet Abstract
Field m_dDOM:Double
'this is the maximum of the set's membership function. For instamce, if
'the set is triangular then this will be the peak point of the triangular.
'if the set has a plateau then this value will be the mid point of the
'plateau. This value is set in the constructor to avoid run-time
'calculation of mid-point values.
Field m_dRepresentativeValue:Double
Rem
bbdoc:
End Rem
Method New()
Self.m_dDOM = 0.0
End Method
Rem
bbdoc:
End Rem
Method CreateBase:TFuzzySet(repVal:Double)
Self.m_dRepresentativeValue = repVal
Return Self
End Method
Rem
bbdoc:
about:
return the degree of membership in this set of the given value. NOTE,
this does not set m_dDOM to the DOM of the value passed as the parameter.
This is because the centroid defuzzification method also uses this method
to determine the DOMs of the values it uses as its sample points.
End Rem
Method CalculateDOM:Double(val:Double) Abstract
Rem
bbdoc:
about:
if this fuzzy set is part of a consequent FLV, and it is fired by a rule
then this method sets the DOM (in this context, the DOM represents a
confidence level)to the maximum of the parameter value or the set's
existing m_dDOM value
End Rem
Method ORwithDOM(val:Double)
If val > Self.m_dDOM
Self.m_dDOM = val
End If
End Method
Rem
bbdoc:
End Rem
Method GetRepresentativeVal:Double()
Return Self.m_dRepresentativeValue
End Method
Rem
bbdoc: Resets DOM
End Rem
Method ClearDOM()
Self.m_dDOM = 0.0
End Method
Rem
bbdoc: Returns DOM
End Rem
Method GetDOM:Double()
Return Self.m_dDOM
End Method
Rem
bbdoc: Set DOM
End Rem
Method SetDOM(val:Double)
Assert (val <= 1 And val >= 0), "TFuzzySet.SetDOM: invalid value"
Self.m_dDOM = val
End Method
End Type