public double Apply(NumericVariable numericVariable, MembershipFunction msf)
{
if (msf.Count == 0)
return (numericVariable.MaxValue - numericVariable.MinValue) / 2.0;
if (msf[0].Y > 0 && msf[0].X > numericVariable.MinValue)
{
msf.Add(numericVariable.MinValue, msf[0].Y);
}
if (msf[msf.Count - 1].Y > 0 && msf[msf.Count - 1].X < numericVariable.MaxValue)
{
msf.Add(numericVariable.MaxValue, msf[msf.Count - 1].Y);
}
var numerator = 0d;
var denominator = 0d;
for (var i = 0; i < msf.Count - 1; i++)
{
var value1 = msf[i];
var value2 = msf[i + 1];
var min = Math.Min(value1.Y, value2.Y);
var max = Math.Max(value1.Y, value2.Y);
var line = new LineSegment(value1, value2);
var m = line.Gradient.Value;
var b = line.B.Value;
numerator += ((m / 3.0) * (Math.Pow(value2.X, 3) - Math.Pow(value1.X, 3))) + ((b / 2.0) * (Math.Pow(value2.X, 2) - Math.Pow(value1.X, 2)));
denominator += ((max + min) / 2.0) * (value2.X - value1.X);
}
return numerator / denominator;
}
public double Apply(NumericVariable numericVariable, MembershipFunction msf)
{
var maximum = double.NegativeInfinity;
var left = 0d;
var right = 0d;
foreach (var item in msf)
{
if (item.Value > maximum)
{
maximum = item.Value;
left = item.Key;
right = item.Key;
}
else if(Math.Abs(item.Value - maximum) < 0.00000000001)
{
right = item.Key;
}
}
var first = msf[0];
if (Math.Abs(first.Y - maximum) < 0.00000000001)
{
left = numericVariable.MinValue;
}
var last = msf[msf.Count -1];
if (Math.Abs(last.Y - maximum) < 0.00000000001)
{
right = numericVariable.MaxValue;
}
return getValue(left, right);
}
public void Constructor()
{
var sut = new NumericVariable("MyIdentifier", -42, 1701);
Assert.AreEqual("MyIdentifier", sut.Identifier);
Assert.AreEqual(-42, sut.MinValue);
Assert.AreEqual(1701, sut.MaxValue);
}
public void ToStringTest()
{
var numVariable = new NumericVariable("MyVariable");
var sut = new NumericValue(numVariable, 42);
Assert.AreEqual(numVariable.Identifier + " = 42", sut.ToString());
}
public void Constructor()
{
var numVariable = new NumericVariable("MyVariable");
var sut = new NumericValue(numVariable, 42);
Assert.AreEqual(numVariable, sut.Variable);
Assert.AreEqual(42, sut.Value);
}
public void EqualsTest()
{
var sut2 = new NumericVariable("MyIdentifier");
var sut1 = new NumericVariable("MyIdentifier");
// ReSharper disable SuspiciousTypeConversion.Global
Assert.IsFalse(sut1.Equals("MyIdentifier"));
// ReSharper restore SuspiciousTypeConversion.Global
Assert.IsTrue(sut1.Equals(sut2));
}
/// <summary>
/// Creates a new numeric value.
/// </summary>
/// <param name="variable">The variable the value gets assigned to.</param>
/// <param name="value">The value for the variable.</param>
public NumericValue(NumericVariable variable, double value)
{
if (variable == null)
throw new ArgumentNullException("variable");
if (variable.MinValue > value || variable.MaxValue < value)
throw new ArgumentOutOfRangeException("value");
Variable = variable;
Value = value;
}
public FuzzyVariable(string identifier, NumericVariable numericVariable, params FuzzyTerm[] fuzzyTerms)
{
if (string.IsNullOrEmpty(identifier))
throw new ArgumentException("identifier");
Identifier = identifier;
Defuzzify = false;
NumericVariable = numericVariable;
FuzzyTerms = fuzzyTerms;
}
public void GetHashCodeTest()
{
var numVariable = new NumericVariable("MyNumVariable");
var fuzzyTerm = new FuzzyTerm("FuzzyTerm",
new MembershipFunction{ { -2, 0 }, { 2, 1 } });
var sut = new FuzzyVariable("MyFuzzyVariable", numVariable, fuzzyTerm);
Assert.AreEqual(sut.Identifier.GetHashCode(), sut.GetHashCode());
}
public void ConstructorFails()
{
var numVariable = new NumericVariable("MyVariable", 42, 1701);
Assert.AreEqual("value",
Assert.Throws<ArgumentOutOfRangeException>(() => new NumericValue(numVariable, 13)).ParamName);
Assert.AreEqual("variable",
Assert.Throws<ArgumentNullException>(() => new NumericValue(null, 42)).ParamName);
}
public void Apply_4(string method, double expected)
{
var numVar = new NumericVariable("Num Variable", 0, 3);
var msf = new MembershipFunction { { 1, 1 } };
var sut = createSut(method);
var result = sut.Apply(numVar, msf);
Assert.AreEqual(expected, result);
}
public void ToStringTest()
{
var numVariable = new NumericVariable("MyNumVariable");
var fuzzyTerm1 = new FuzzyTerm("FuzzyTerm1",
new MembershipFunction{ { -2, 0 }, { 2, 1 } });
var fuzzyTerm2 = new FuzzyTerm("FuzzyTerm2",
new MembershipFunction{ { -2, 0 }, { 2, 1 } });
var sut = new FuzzyVariable("MyFuzzyVariable", numVariable, fuzzyTerm1, fuzzyTerm2);
Assert.AreEqual("MyFuzzyVariable = { FuzzyTerm1, FuzzyTerm2 }", sut.ToString());
}
public void Apply_On_Symmetric_Msf_4()
{
var var = new NumericVariable("Var", -5, 5);
var msf = new MembershipFunction { { -5, 0 }, { -4, 1 }, { -3, 0 }, { -2, 1 }, { 2, 1 }, { 3, 0 }, { 4, 1 }, { 5, 0 } };
var sut = new CoGDefuzzifyStrategy();
const double expectedResult = 0;
var result = sut.Apply(var, msf);
Assert.AreEqual(expectedResult, result, 0.00000000001);
}
public void Apply_On_Symmetric_Msf_3()
{
var var = new NumericVariable("Var", 0, 4);
var msf = new MembershipFunction { { 0, 0 }, { 1, 1 }, { 2, 0.5 }, { 3, 1 }, { 4, 0 } };
var sut = new CoGDefuzzifyStrategy();
const double expectedResult = 2;
var result = sut.Apply(var, msf);
Assert.AreEqual(expectedResult, result, 0.00000000001);
}
public void Constructor()
{
var numVariable = new NumericVariable("MyNumVariable");
var fuzzyTerm = new FuzzyTerm("MyFuzzyTerm",
new MembershipFunction{ { -2, 0 }, { 2, 1 } });
var sut = new FuzzyVariable("MyFuzzyVariable", numVariable, fuzzyTerm);
Assert.AreEqual("MyFuzzyVariable", sut.Identifier);
Assert.AreEqual(numVariable, sut.NumericVariable);
Assert.AreEqual(1, sut.FuzzyTerms.Count());
Assert.AreEqual(fuzzyTerm, sut.FuzzyTerms.ElementAt(0));
}
public void Apply_On_Empty_Msf()
{
var var = new NumericVariable("Var", 0, 2);
var msf = new MembershipFunction();
var sut = new CoGDefuzzifyStrategy();
const double expectedResult = 1d;
var result = sut.Apply(var, msf);
Assert.AreEqual(expectedResult, result, 0.00000000001);
}
public void GetHashCodeTest()
{
var numVariable = new NumericVariable("MyNumVariable");
var fuzzyTerm1 = new FuzzyTerm("FuzzyTerm1",
new MembershipFunction{ { -2, 0 }, { 2, 1 } });
var fuzzyTerm2 = new FuzzyTerm("FuzzyTerm2",
new MembershipFunction{ { -2, 0 }, { 2, 1 } });
var fuzVariable = new FuzzyVariable("MyFuzzyVariable", numVariable, fuzzyTerm1, fuzzyTerm2);
var sut = new FuzzyValue(fuzVariable,new Dictionary<FuzzyTerm, double>{{fuzzyTerm1, 1}});
Assert.AreEqual(fuzVariable.GetHashCode(), sut.GetHashCode());
}
public void Constructor()
{
var num1 = new NumericVariable("Variable1");
var num2 = new NumericVariable("Variable2");
var term1 = new FuzzyTerm("Var1_Term1", new MembershipFunction());
var term2 = new FuzzyTerm("Var2_Term1", new MembershipFunction());
var var1 = new FuzzyVariable("Variable1", num1, term1);
var var2 = new FuzzyVariable("Variable2", num2, term2);
var rule1 = new FuzzyImplication(new ValueExpression(var1, term1), new ValueExpression(var1, term1));
var rule2 = new FuzzyImplication(new ValueExpression(var2, term2), new ValueExpression(var2, term2));
var sut = new Iteration(new[] { rule1, rule2 });
Assert.AreEqual(rule1, sut.Implications[0]);
Assert.AreEqual(rule2, sut.Implications[1]);
}
public void Apply_Unit_Test()
{
var numVar = new NumericVariable("Num Variable", 0, 42);
var msf1 = new MembershipFunction { { 1, 0 } };
var msf2 = new MembershipFunction { { 2, 0 } };
var term1 = new FuzzyTerm("Term1", msf1);
var term2 = new FuzzyTerm("Term2", msf2);
const double value1 = 0.3;
const int value2 = 06;
var fuzzyVariable = new FuzzyVariable("Var", numVar, term1, term2);
var fuzzyValue = new FuzzyValue(fuzzyVariable,
new Dictionary<FuzzyTerm, double> {{term1, value1}, {term2, value2}});
var scaledMsf1 = new MembershipFunction {{0, 0}};
var scaledMsf2 = new MembershipFunction {{1, 1}};
var mergedValue = new MembershipFunction {{2, 1}};
const double expectedDefuzzifiedValue = 42;
var mocks = new MockRepository();
var scaleStrategy = mocks.StrictMock<IMsfScalingStrategy>();
var mergeStrategy = mocks.StrictMock<IMsfMergingStrategy>();
var defuzzifyStrategy = mocks.StrictMock<IDefuzzifyStrategy>();
// 1. Scale the membership functions according to the fuzzy value
Expect.Call(scaleStrategy.Apply(msf1, value1)).Return(scaledMsf1).Repeat.Once();
Expect.Call(scaleStrategy.Apply(msf2, value2)).Return(scaledMsf2).Repeat.Once();
// 2. Merge all membership functions into single one
Expect.Call(mergeStrategy.Apply(new[] {scaledMsf1, scaledMsf2})).IgnoreArguments().Return(mergedValue).Repeat.Once();
// 3. Create a defuzzified value for the result of the previous merge.
Expect.Call(defuzzifyStrategy.Apply(numVar, mergedValue)).Return(expectedDefuzzifiedValue).Repeat.Once();
mocks.ReplayAll();
var sut = new Defuzzifier(scaleStrategy, mergeStrategy, defuzzifyStrategy);
var result = sut.Apply(fuzzyValue);
Assert.AreEqual(fuzzyVariable, result.Variable);
Assert.AreEqual(mergedValue, result.MembershipFunction);
Assert.AreEqual(expectedDefuzzifiedValue, result.Value);
mocks.VerifyAll();
}
public void EqualsTest()
{
var numVariable = new NumericVariable("MyNumVariable");
var fuzzyTerm1 = new FuzzyTerm("FuzzyTerm1",
new MembershipFunction{ { -2, 0 }, { 2, 1 } });
var fuzzyTerm2 = new FuzzyTerm("FuzzyTerm2",
new MembershipFunction{ { -2, 0 }, { 2, 1 } });
var sut1 = new FuzzyVariable("MyFuzzyVariable", numVariable, fuzzyTerm1);
var sut2 = new FuzzyVariable("MyFuzzyVariable", numVariable, fuzzyTerm2);
// ReSharper disable SuspiciousTypeConversion.Global
Assert.IsFalse(sut1.Equals("MyIdentifier"));
// ReSharper restore SuspiciousTypeConversion.Global
Assert.IsTrue(sut1.Equals(sut2));
}
private void runTest(Action<Scope, FuzzyValue, FuzzyValue> runAndAssert)
{
var num1 = new NumericVariable("Variable1");
var num2 = new NumericVariable("Variable2");
var term11 = new FuzzyTerm("Var1_Term1", new MembershipFunction());
var term12 = new FuzzyTerm("Var1_Term2", new MembershipFunction());
var term21 = new FuzzyTerm("Var2_Term1", new MembershipFunction());
var term22 = new FuzzyTerm("Var2_Term2", new MembershipFunction());
var var1 = new FuzzyVariable("Variable1", num1, term11, term12);
var var2 = new FuzzyVariable("Variable2", num2, term21, term22);
var value1 = new FuzzyValue(var1, new Dictionary<FuzzyTerm, double> {{term11, 0.4}, {term12, 0.3}});
var value2 = new FuzzyValue(var2, new Dictionary<FuzzyTerm, double> {{term21, 0.1}, {term22, 0.2}});
var sut = new Scope(value1, value2);
runAndAssert(sut, value1, value2);
}
public void ToStringTest()
{
var numVariable = new NumericVariable("MyNumVariable");
var fuzzyTerm1 = new FuzzyTerm("FuzzyTerm1",
new MembershipFunction{ { -2, 0 }, { 2, 1 } });
var fuzzyTerm2 = new FuzzyTerm("FuzzyTerm2",
new MembershipFunction{ { -2, 0 }, { 2, 1 } });
var fuzVariable = new FuzzyVariable("MyFuzzyVariable", numVariable, fuzzyTerm1, fuzzyTerm2);
var sut = new FuzzyValue(fuzVariable,
new Dictionary<FuzzyTerm, double>
{
{fuzzyTerm1, 1},
{fuzzyTerm2, 0.5}
});
Assert.AreEqual(fuzVariable.Identifier + " = ( FuzzyTerm1=1, FuzzyTerm2=0,5 )", sut.ToString());
}
public void Test()
{
var nVar = new NumericVariable("Km/h", 0);
var slow = new FuzzyTerm("Slow", new MembershipFunction{ { 30, 1 }, { 50, 0 } });
var medium = new FuzzyTerm("Medium", new MembershipFunction{ { 40, 0 }, { 70, 1 }, { 110, 0 } });
var fast = new FuzzyTerm("Fast", new MembershipFunction{ { 70, 0 }, { 90, 1 } });
var speed = new FuzzyVariable("Speed", nVar, slow, medium, fast);
var sut = new Fuzzifier(speed);
var result = sut.Apply(new NumericValue(nVar, 90));
Assert.AreEqual(1, result.Count);
var speedValue = result[0];
Assert.AreEqual(speed, speedValue.AssociatedVariable);
Assert.AreEqual(2, speedValue.Values.Count);
Assert.AreEqual(0.5, speedValue.Values[medium]);
Assert.AreEqual(1, speedValue.Values[fast]);
}
public void Constructor()
{
var numVariable = new NumericVariable("MyNumVariable");
var fuzzyTerm1 = new FuzzyTerm("FuzzyTerm1",
new MembershipFunction{ { -2, 0 }, { 2, 1 } });
var fuzzyTerm2 = new FuzzyTerm("FuzzyTerm2",
new MembershipFunction{ { -2, 0 }, { 2, 1 } });
var fuzVariable = new FuzzyVariable("MyFuzzyVariable", numVariable, fuzzyTerm1, fuzzyTerm2);
var sut = new FuzzyValue(fuzVariable,
new Dictionary<FuzzyTerm, double>
{
{fuzzyTerm1, 1},
{fuzzyTerm2, 0.5}
});
Assert.AreEqual(fuzVariable, sut.AssociatedVariable);
Assert.AreEqual(2, sut.Values.Count);
Assert.AreEqual(1, sut.Values[fuzzyTerm1]);
Assert.AreEqual(0.5, sut.Values[fuzzyTerm2]);
}
public void Apply_4()
{
var var = new NumericVariable("Var", 0, 3);
var msf = new MembershipFunction { { 0, 0 }, { 1, 0.5 }, { 3, 0.5 }, { 4, 1 }, { 6, 0 } };
var sut = new CoGDefuzzifyStrategy();
const double expectedResult = 57.0/18.0;
var result = sut.Apply(var, msf);
Assert.AreEqual(expectedResult, result, 0.00000000001);
}
public bool Equals(NumericVariable obj)
{
return obj != null && obj.Identifier == Identifier;
}
public void Apply_2()
{
var var = new NumericVariable("Var", 1, 2);
var msf = new MembershipFunction { { 1, 0.5 }, { 2, 1 } };
var sut = new CoGDefuzzifyStrategy();
const double expectedResult = 14.0 / 9.0;
var result = sut.Apply(var, msf);
Assert.AreEqual(expectedResult, result, 0.00000000001);
}
public void ToStringTest()
{
var sut = new NumericVariable("MyIdentifier");
Assert.AreEqual(sut.Identifier, sut.ToString());
}
public void GetHashCodeTest()
{
var sut = new NumericVariable("MyIdentifier");
Assert.AreEqual(sut.Identifier.GetHashCode(), sut.GetHashCode());
}