371 lines
17 KiB
MQL5
371 lines
17 KiB
MQL5
//+------------------------------------------------------------------+
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//| fuzzyrule.mqh |
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//| Copyright 2000-2025, MetaQuotes Ltd. |
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//| https://www.mql5.com |
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//+------------------------------------------------------------------+
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//| Implementation of Fuzzy library in MetaQuotes Language 5 |
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//| |
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//| The features of the library include: |
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//| - Create Mamdani fuzzy model |
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//| - Create Sugeno fuzzy model |
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//| - Normal membership function |
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//| - Triangular membership function |
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//| - Trapezoidal membership function |
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//| - Constant membership function |
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//| - Defuzzification method of center of gravity (COG) |
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//| - Defuzzification method of bisector of area (BOA) |
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//| - Defuzzification method of mean of maxima (MeOM) |
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//| |
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//| This file is free software; you can redistribute it and/or |
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//| modify it under the terms of the GNU General Public License as |
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//| published by the Free Software Foundation (www.fsf.org); either |
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//| version 2 of the License, or (at your option) any later version. |
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//| |
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//| This program is distributed in the hope that it will be useful, |
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//| but WITHOUT ANY WARRANTY; without even the implied warranty of |
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//| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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//| GNU General Public License for more details. |
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//+------------------------------------------------------------------+
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#include <Arrays\List.mqh>
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#include "FuzzyVariable.mqh"
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#include "InferenceMethod.mqh"
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//+------------------------------------------------------------------+
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//| Purpose: Creating fuzzy rules |
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//+------------------------------------------------------------------+
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//+------------------------------------------------------------------+
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//| And/Or operator type |
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//+------------------------------------------------------------------+
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enum OperatorType
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{
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And, // And operator
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Or // Or operator
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};
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//+------------------------------------------------------------------+
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//| Hedge modifiers |
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//+------------------------------------------------------------------+
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enum HedgeType
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{
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None, // None
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Slightly, // Cube root
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Somewhat, // Square root
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Very, // Square
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Extremely // Cube
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};
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//+------------------------------------------------------------------+
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//| Class of CConditions used in the 'if' expression |
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//+------------------------------------------------------------------+
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class ICondition : public CObject
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{
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public:
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//--- method to check type
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virtual bool IsTypeOf(EnCondition type) { return(type==TYPE_CLASS_ICondition); }
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};
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//+------------------------------------------------------------------+
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//| Single condition |
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//+------------------------------------------------------------------+
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class CSingleCondition : public ICondition
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{
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private:
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INamedVariable *m_var; // Type of variable
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INamedValue *m_term; // Type of value
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bool m_not; // Is MF inverted
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public:
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CSingleCondition(void);
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CSingleCondition(INamedVariable *var,INamedValue *term);
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CSingleCondition(INamedVariable *var,INamedValue *term,bool not);
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~CSingleCondition(void);
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//--- methods gets or sets the varriable
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INamedVariable *Var(void) { return(m_var); }
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void Var(INamedVariable *value) { m_var=value; }
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//--- methods gets or sets mark "Is MF inverted"
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bool Not(void) { return(m_not); }
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void Not(bool not) { m_not=not; }
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//--- methods gets or sets term in expression
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INamedValue *Term(void) { return(m_term); }
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void Term(INamedValue *value) { m_term=value; }
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//--- method to check type
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virtual bool IsTypeOf(EnCondition type) { return(type==TYPE_CLASS_SingleCondition); }
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};
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//+------------------------------------------------------------------+
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//| Constructor without parameters |
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//+------------------------------------------------------------------+
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CSingleCondition::CSingleCondition(void)
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{
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m_var = NULL;
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m_not = false;
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m_term=NULL;
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};
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//+------------------------------------------------------------------+
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//| First constructor with parameters |
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//+------------------------------------------------------------------+
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CSingleCondition::CSingleCondition(INamedVariable *var,INamedValue *term)
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{
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m_var=var;
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m_term=term;
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}
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//+------------------------------------------------------------------+
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//| Second constructor with parameters |
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//+------------------------------------------------------------------+
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CSingleCondition::CSingleCondition(INamedVariable *var,INamedValue *term,bool not)
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{
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m_var=var;
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m_term=term;
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m_not=not;
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}
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//+------------------------------------------------------------------+
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//| Destructor |
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//+------------------------------------------------------------------+
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CSingleCondition::~CSingleCondition(void)
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{
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if(CheckPointer(m_var)==POINTER_DYNAMIC)
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delete m_var;
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if(CheckPointer(m_term)==POINTER_DYNAMIC)
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delete m_term;
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}
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//+------------------------------------------------------------------+
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//| Condition of fuzzy rule for the both Mamdani and Sugeno systems |
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//+------------------------------------------------------------------+
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class CFuzzyCondition : public CSingleCondition
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{
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private:
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HedgeType m_hedge; // hedge type
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public:
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CFuzzyCondition(CFuzzyVariable *var,CFuzzyTerm *term,bool not);
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CFuzzyCondition(CFuzzyVariable *var,CFuzzyTerm *term,bool not,HedgeType hedge);
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CFuzzyCondition(CFuzzyVariable *var,CFuzzyTerm *term);
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~CFuzzyCondition(void);
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//--- methods gets or sets the hedge type
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HedgeType Hedge(void) { return (m_hedge); }
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void Hedge(HedgeType value) { m_hedge=value; }
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//--- method to check type
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virtual bool IsTypeOf(EnCondition type) { return(type==TYPE_CLASS_FuzzyCondition); }
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};
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//+------------------------------------------------------------------+
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//| First constructor with parameters |
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//+------------------------------------------------------------------+
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CFuzzyCondition::CFuzzyCondition(CFuzzyVariable *var,CFuzzyTerm *term,bool not)
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{
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CSingleCondition::Var(var);
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CSingleCondition::Term(term);
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CSingleCondition::Not(not);
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m_hedge=None;
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}
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//+------------------------------------------------------------------+
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//| Second constructor with parameters |
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//+------------------------------------------------------------------+
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CFuzzyCondition::CFuzzyCondition(CFuzzyVariable *var,CFuzzyTerm *term,bool not,HedgeType hedge)
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{
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CSingleCondition::Var(var);
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CSingleCondition::Term(term);
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CSingleCondition::Not(not);
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m_hedge=hedge;
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}
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//+------------------------------------------------------------------+
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//| Thrid constructor with parameters |
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//+------------------------------------------------------------------+
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CFuzzyCondition::CFuzzyCondition(CFuzzyVariable *var,CFuzzyTerm *term)
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{
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CSingleCondition::Var(var);
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CSingleCondition::Term(term);
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CSingleCondition::Not(false);
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}
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//+------------------------------------------------------------------+
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//| Destructor |
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//+------------------------------------------------------------------+
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CFuzzyCondition::~CFuzzyCondition(void)
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{
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}
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//+------------------------------------------------------------------+
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//| Several CConditions linked by or/and operators |
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//+------------------------------------------------------------------+
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class CConditions : public ICondition
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{
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private:
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bool m_not; // Default : false
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OperatorType m_op; // Type of operator. Default : And
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CList *m_conditions; // List of CConditions
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public:
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CConditions(void);
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~CConditions(void);
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//--- methods gets or sets the mark "Is MF inverted"
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bool Not(void) { return(m_not); }
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void Not(bool value) { m_not=value; }
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//--- methods gets or sets operator that links expressions (and/or)
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OperatorType Op(void) { return (m_op); }
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void Op(OperatorType value) { m_op=value; }
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//--- method gets the list of CConditions (single or multiples)
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CList *ConditionsList(void) { return(m_conditions); }
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//--- method to check type
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virtual bool IsTypeOf(EnCondition type) { return(type==TYPE_CLASS_Conditions); }
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};
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//+------------------------------------------------------------------+
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//| Constructor without parameters |
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//+------------------------------------------------------------------+
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CConditions::CConditions(void)
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{
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m_not=false;
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m_op = And;
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m_conditions=new CList;
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}
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//+------------------------------------------------------------------+
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//| Destructor |
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//+------------------------------------------------------------------+
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CConditions::~CConditions(void)
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{
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delete m_conditions;
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}
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//+------------------------------------------------------------------+
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//| Class used by rule parser |
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//+------------------------------------------------------------------+
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class IParsableRule : public CObject
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{
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public:
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//--- methods gets or sets the condition (IF) part of the rule
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virtual CConditions *Condition(void) { return(NULL); }
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virtual void Condition(CConditions *value) { }
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//--- methods gets or sets the conclusion (THEN) part of the rule
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virtual CSingleCondition *Conclusion(void) { return(NULL); }
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virtual void Conclusion(CSingleCondition *value) { }
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//--- method to check type
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virtual bool IsTypeOf(EnRule type) { return(type==TYPE_CLASS_IParsableRule); }
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};
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//+------------------------------------------------------------------+
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//| Implements common functionality of fuzzy rules |
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//+------------------------------------------------------------------+
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class CGenericFuzzyRule : public IParsableRule
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{
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private:
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CConditions *m_generic_condition; // Generic path of condition
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public:
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CGenericFuzzyRule(void);
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~CGenericFuzzyRule(void);
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//--- methods gets or sets the condition (IF) part of the rule
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CConditions *Condition(void) { return(m_generic_condition); }
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void Condition(CConditions *value) { m_generic_condition=value; }
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//--- methods create a single condition
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CFuzzyCondition *CreateCondition(CFuzzyVariable *var,CFuzzyTerm *term);
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CFuzzyCondition *CreateCondition(CFuzzyVariable *var,CFuzzyTerm *term,bool not);
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CFuzzyCondition *CreateCondition(CFuzzyVariable *var,CFuzzyTerm *term,bool not,HedgeType hedge);
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//--- methods gets or sets the conclusion (THEN) part of the rule
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virtual CSingleCondition *Conclusion(void) { return(NULL); }
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virtual void Conclusion(CSingleCondition *value) { }
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//--- method to check type
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virtual bool IsTypeOf(EnRule type) { return(type==TYPE_CLASS_GenericFuzzyRule); }
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};
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//+------------------------------------------------------------------+
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//| Constructor without parameters |
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//+------------------------------------------------------------------+
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CGenericFuzzyRule::CGenericFuzzyRule(void)
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{
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m_generic_condition=new CConditions();
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}
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//+------------------------------------------------------------------+
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//| Destructor |
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//+------------------------------------------------------------------+
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CGenericFuzzyRule::~CGenericFuzzyRule(void)
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{
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delete m_generic_condition;
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}
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//+------------------------------------------------------------------+
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//| Create a single condition(1) |
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//+------------------------------------------------------------------+
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CFuzzyCondition *CGenericFuzzyRule::CreateCondition(CFuzzyVariable *var,CFuzzyTerm *term)
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{
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//--- return fuzzy condition
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return new CFuzzyCondition(var, term);
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}
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//+------------------------------------------------------------------+
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//| Create a single condition(2) |
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//+------------------------------------------------------------------+
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CFuzzyCondition *CGenericFuzzyRule::CreateCondition(CFuzzyVariable *var,CFuzzyTerm *term,bool not)
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{
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//--- return fuzzy condition
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return new CFuzzyCondition(var, term, not);
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}
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//+------------------------------------------------------------------+
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//| Create a single condition(3) |
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//+------------------------------------------------------------------+
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CFuzzyCondition *CGenericFuzzyRule::CreateCondition(CFuzzyVariable *var,CFuzzyTerm *term,bool not,HedgeType hedge)
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{
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//--- return fuzzy condition
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return new CFuzzyCondition(var, term, not, hedge);
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}
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//+------------------------------------------------------------------+
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//| Fuzzy rule for Mamdani fuzzy system. |
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//| NOTE: a rule cannot be created directly, only via |
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//| MamdaniFuzzySystem::EmptyRule or MamdaniFuzzySystem::ParseRule |
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//+------------------------------------------------------------------+
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class CMamdaniFuzzyRule : public CGenericFuzzyRule
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{
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private:
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CSingleCondition *m_mamdani_conclusion; // Mamdani conclusion
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double m_weight; // Weight of Mamdani rule
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public:
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CMamdaniFuzzyRule(void);
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~CMamdaniFuzzyRule(void);
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//--- methods gets or sets the conclusion (THEN) part of the rule
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CSingleCondition *Conclusion(void) { return(m_mamdani_conclusion); }
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void Conclusion(CSingleCondition *value) { m_mamdani_conclusion=value; }
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//--- methods gets or sets the rule weight
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double Weight(void) { return(m_weight); }
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void Weight(const double value) { m_weight=value; }
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//--- method to check type
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virtual bool IsTypeOf(EnRule type) { return(type==TYPE_CLASS_MamdaniFuzzyRule); }
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};
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//+---------------------------------------------------------------+
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//| Constructor without parameters |
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//+---------------------------------------------------------------+
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CMamdaniFuzzyRule::CMamdaniFuzzyRule(void)
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{
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m_weight=1.0;
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}
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//+------------------------------------------------------------------+
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//| Destructor |
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//+------------------------------------------------------------------+
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CMamdaniFuzzyRule::~CMamdaniFuzzyRule(void)
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{
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if(CheckPointer(m_mamdani_conclusion)==POINTER_DYNAMIC)
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delete m_mamdani_conclusion;
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}
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//+------------------------------------------------------------------+
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//| Fuzzy rule for Sugeno fuzzy system |
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//| NOTE: a rule cannot be created directly, only via |
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//| SugenoFuzzySystem::EmptyRule or SugenoFuzzySystem::ParseRule |
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//+------------------------------------------------------------------+
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class CSugenoFuzzyRule : public CGenericFuzzyRule
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{
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private:
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CSingleCondition *m_sugeno_conclusion; // Sugeno conclusion
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public:
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CSugenoFuzzyRule(void);
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~CSugenoFuzzyRule(void);
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//--- methods gets or sets the conclusion (THEN) part of the rule
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CSingleCondition *Conclusion(void) { return(m_sugeno_conclusion); }
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void Conclusion(CSingleCondition *value) { m_sugeno_conclusion=value; }
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//--- method to check type
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virtual bool IsTypeOf(EnRule type) { return(type==TYPE_CLASS_SugenoFuzzyRule); }
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};
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//+------------------------------------------------------------------+
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//| Constructor without parameters |
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//+-------------------------- ---------------------------------------+
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CSugenoFuzzyRule::CSugenoFuzzyRule(void)
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{
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}
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//+------------------------------------------------------------------+
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//| Destructor |
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//+------------------------------------------------------------------+
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CSugenoFuzzyRule::~CSugenoFuzzyRule(void)
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{
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if(CheckPointer(m_sugeno_conclusion)==POINTER_DYNAMIC)
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delete m_sugeno_conclusion;
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}
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//+------------------------------------------------------------------+
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