public void AddLevel(IntervalD level, double alpha)
{
if (_alphaLevels.ContainsKey(alpha))
_alphaLevels[alpha] = level;
else
_alphaLevels.Add(alpha, level);
}
public void PropagateSignal()
{
var levelsRight = new Dictionary<double, IntervalD>
{
{0.0, new IntervalD(1.0, 3.0)},
{0.5, new IntervalD(1.5, 2.5)},
{1.0, new IntervalD(2.0, 2.0)},
};
var weight = new DiscreteFuzzyNumber(levelsRight);
var input = new Link(weight);
var output = new Link();
var f = new Func<double, double>(x => 1.0 / (1.0 + Math.Pow(Math.E, -x)));
var neuron = new FuzzyNeuron(f, () => DiscreteFuzzyNumber.GenerateLittleNumber(levelsCount: 3));
neuron.AddInput(input, weight);
neuron.SetOutput(output);
neuron.Propagate();
var expectedLevel00 = new IntervalD(f(1), f(9));
var expectedLevel05 = new IntervalD(f(2.25), f(6.25));
var expectedLevel10 = new IntervalD(f(4.0), f(4.0));
Assert.NotNull(output.Signal);
Assert.That(output.Signal.GetAlphaLevel(0.0), Is.EqualTo(expectedLevel00));
Assert.That(output.Signal.GetAlphaLevel(0.5), Is.EqualTo(expectedLevel05));
Assert.That(output.Signal.GetAlphaLevel(1.0), Is.EqualTo(expectedLevel10));
}
public void ContainSameValuesAfterConstructionFromIntervalD()
{
var source = new IntervalD(0.0, 0.0);
var result = new IntervalD(source);
Assert.That(result, Is.EqualTo(source));
}
public void BeAnotherObjectAfterConstructionFromIntervalD()
{
var source = new IntervalD(0.0, 0.0);
var result = new IntervalD(source);
Assert.AreNotSame(result, source, "New point should be another object");
}
public void CorrectlySubstractIntervals()
{
const double a1 = -3.0;
const double b1 = 0.5;
var x = new IntervalD(a1, b1);
const double a2 = 0.5;
const double b2 = 2.0;
var y = new IntervalD(a2, b2);
var result = x - y;
Assert.That(result, Is.EqualTo(new IntervalD(a1 - a2, b1 - b2)));
}
public void CorrectlyMultiplyIntervals()
{
const double a1 = -3.0;
const double b1 = 0.5;
var x = new IntervalD(a1, b1);
const double a2 = 0.5;
const double b2 = 2.0;
var y = new IntervalD(a2, b2);
var result = x*y;
Assert.That(result, Is.EqualTo(new IntervalD(a1*a2, b1*b2)));
}
public void CorrectlyDivideIntervals()
{
const double a1 = -3.0;
const double b1 = 0.5;
var x = new IntervalD(a1, b1);
const double a2 = 0.5;
const double b2 = 2.0;
var y = new IntervalD(a2, b2);
var result = x / y;
Assert.That(result, Is.EqualTo(new IntervalD(a1 / a2, b1 / b2)));
}
public void ThrowArgumentExceptionOnZeroDivision()
{
const double a1 = -3.0;
const double b1 = 0.5;
var x = new IntervalD(a1, b1);
const double a2 = 0.5;
const double b2 = 0.0;
var y = new IntervalD(a2, b2);
Assert.Throws<DivideByZeroException>(() => { var result = x / y; });
}
public void SwapValuesToMakeCorrectInterval()
{
const double min = -1.0;
const double max = 3.0;
var result = new IntervalD(max, min);
Assert.That(result.X, Is.EqualTo(min));
Assert.That(result.Y, Is.EqualTo(max));
}
public bool Equals(IntervalD value)
{
return Math.Abs(X - value.X) < Epsilon &&
Math.Abs(Y - value.Y) < Epsilon;
}
public void ReturnTrueComparingValuesSmallerEpsilon()
{
const double epsilon = IntervalD.Epsilon;
const double x = 1.0;
var a = new IntervalD(x + epsilon / 2.0, x);
var b = new IntervalD(x, x);
Assert.That(a == b, Is.True);
}
public void ReturnTrueComparingSameValues()
{
const double x = 1.0001;
var a = new IntervalD(x, x);
var b = new IntervalD(x, x);
Assert.That(a == b, Is.True);
}
public void ReturnFalseIfNotContainsValue()
{
const double x = -1.001;
const double left = -1.0;
const double right = 100.0;
var interval = new IntervalD(left, right);
var result = interval.Contains(x);
Assert.That(result, Is.False);
}
public void CorrectlyApplyActivationFunction()
{
var f = new Func<double, double>(value => 1.0/(1.0 + Math.Pow(Math.E, -value)));
var levelsLeft = new Dictionary<double, IntervalD>
{
{0.0, new IntervalD(-2.0, 2.0)},
{0.5, new IntervalD(-1.0, 1.0)},
{1.0, new IntervalD(0.0, 0.0)},
};
var x = new DiscreteFuzzyNumber(levelsLeft);
var activation = x.Apply(f);
var expectedValueOnLevel00 = new IntervalD(f(-2.0), f(2.0));
var expectedValueOnLevel05 = new IntervalD(f(-1.0), f(1.0));
var expectedValueOnLevel10 = new IntervalD(f(0.0), f(0.0));
Assert.That(activation.GetAlphaLevel(0.0), Is.EqualTo(expectedValueOnLevel00));
Assert.That(activation.GetAlphaLevel(0.5), Is.EqualTo(expectedValueOnLevel05));
Assert.That(activation.GetAlphaLevel(1.0), Is.EqualTo(expectedValueOnLevel10));
}
public void ReturnFalseComparingDifferentValues()
{
var a = new IntervalD(1, 1);
var b = new IntervalD(1, 2);
Assert.That(a == b, Is.False);
}
public void ReturnTrueIfContainsValue()
{
const double x = 99.99;
const double left = -1.0;
const double right = 100.0;
var interval = new IntervalD(left, right);
var result = interval.Contains(x);
Assert.That(result, Is.True);
}
public IntervalD(IntervalD interval)
: this(interval.X, interval.Y)
{
}