public void SaveAndLoadNetState()
{
const int inputsCount = 3;
var net = new SimpleFuzzyNet(inputsCount, new[] {2},
levelsCount: 3,
littleFuzzyNumberGenerator:
() => DiscreteFuzzyNumber.GenerateLittleNumber(levelsCount: 3));
var first = new DiscreteFuzzyNumber(new TriangularFuzzyFunction(-1, 0, 1), 3);
var second = new DiscreteFuzzyNumber(new TriangularFuzzyFunction(-1, -0.5, 0), 3);
var third = new DiscreteFuzzyNumber(new TriangularFuzzyFunction(0, 0.5, 1), 3);
var inputs = new List<IFuzzyNumber>
{
first,
second,
third,
};
var expectedOutput = net.Propagate(inputs).First();
BinaryFileSerializer.SaveNetState(_filename, net);
var loadedNet = BinaryFileSerializer.LoadNetState(_filename);
var actualOutput = loadedNet.PropagateLastInput().First();
expectedOutput.ForeachLevel((alpha, level) => Assert.That(level, Is.EqualTo(actualOutput.GetAlphaLevel(alpha))));
}
public void ReturnZeroErrorOnPatternsSameAsOutput()
{
var patternA = new LearningPattern
{
Input = new List<IFuzzyNumber>
{
new DiscreteFuzzyNumber(new TriangularFuzzyFunction(-1, 0, 1), 3),
new DiscreteFuzzyNumber(new TriangularFuzzyFunction(-1, 0, 1), 3),
new DiscreteFuzzyNumber(new TriangularFuzzyFunction(-1, 0, 1), 3),
},
Output = new List<IFuzzyNumber>(),
};
var patternB = new LearningPattern
{
Input = new List<IFuzzyNumber>
{
new DiscreteFuzzyNumber(new TriangularFuzzyFunction(0, 1, 2), 3),
new DiscreteFuzzyNumber(new TriangularFuzzyFunction(0, 1, 2), 3),
new DiscreteFuzzyNumber(new TriangularFuzzyFunction(0, 1, 2), 3),
},
Output = new List<IFuzzyNumber>()
};
var bp = new BackPropagation(new List<ILearningPattern> { patternA, patternB });
var net = new SimpleFuzzyNet(3, new[] {2}, () => DiscreteFuzzyNumber.GenerateLittleNumber(levelsCount: 3),
levelsCount: 3);
patternA.Output = net.Propagate(patternA.Input);
patternB.Output = net.Propagate(patternB.Input);
bp.StepPerformed += (state) => Assert.That(state.CycleError, Is.EqualTo(0.0));
bp.LearnNet(net);
}
public void ContainsCorrectLastInputsVectorAfterSecondPropagationWithWeightsChanged()
{
const int inputs = 2;
var hidden = new[] { 2, 2 };
const int outputs = 2;
Func<double, double> activation = x => x;
var net = new SimpleFuzzyNet(inputs, hidden, GenerateNumbers, activation, outputs);
var input = new List<IFuzzyNumber>
{
new RealNumber(1.0),
new RealNumber(2.0),
};
var lastInputs = net.GetLastInputsForWeights();
net.Propagate(input);
ChangeFirstWeightsOfNeuronsToOne(net.Layers);
net.Propagate(input);
var expectedLastInputs = new IFuzzyNumber[]
{
//output layer
//first neuron
new RealNumber(-5.0),
new RealNumber(-5.0),
//second neuron
new RealNumber(-5.0),
new RealNumber(-5.0),
//hidden 1
new RealNumber(1.0),
new RealNumber(2.0),
new RealNumber(1.0),
new RealNumber(2.0),
//hidden 2
new RealNumber(-2.0),
new RealNumber(3.0),
new RealNumber(-2.0),
new RealNumber(3.0),
};
int i = 0;
foreach (var lastInput in lastInputs)
{
Assert.That(lastInput.Signal.GetMod().X, Is.EqualTo(expectedLastInputs[i].GetMod().X));
i++;
}
}
static void Main(string[] args)
{
/*var f =
new Func<IVector, double>(
vector =>
-Math.Exp(-Math.Pow(vector[0].GetMod().X - 1, 2)) -
Math.Exp(-0.5 * Math.Pow(vector[1].GetMod().X - 2, 2)));
Func<IVector, IVector> g = vector => new Vector(new[]
{
// df/dx = {-2 e^(- (x-1)^2) (x-1)}
new RealNumber(2*Math.Exp(-Math.Pow(vector[0].GetMod().X - 1, 2))*(vector[0].GetMod().X - 1)),
// df/dy = {- e^(-1/2 (y-2)^2) (y-2)}
new RealNumber(Math.Exp(-0.5*Math.Pow(vector[1].GetMod().X - 2, 2))*(vector[1].GetMod().X - 2))
});*/
/*var f = new Func<IVector, double>(
vector =>
//(1 - x)^2 + 100(-x^2 + y)^2
Math.Pow(1 - vector[0].GetMod().X, 2) + 100 * Math.Pow(-Math.Pow(vector[0].GetMod().X, 2) + vector[1].GetMod().X, 2) );
Func<IVector, IVector> g = vector => new Vector(new[]
{
// df/dx = {-2x + 200(-x^2 + y)(-2)x }
new RealNumber( -2.0*vector[0].GetMod().X - 400*(-Math.Pow(vector[0].GetMod().X, 2) + vector[1].GetMod().X)*vector[0].GetMod().X ),
// df/dy = {200(-x^2 + y)}
new RealNumber(200*( -Math.Pow(vector[0].GetMod().X, 2) + vector[1].GetMod().X ))
});*/
/*var f = new Func<IVector, double>(
vector =>
//(1 - x)^2 + (1 - y)^2
Math.Pow(1.0 - vector[0].GetMod().X, 2) + Math.Pow(1.0 - vector[1].GetMod().X, 2));
Func<IVector, IVector> g = vector => new Vector(new[]
{
// df/dx = {-2(1 - x)}
new RealNumber( -2.0*(1.0 - vector[0].GetMod().X) ),
// df/dy = {-2(1 - y)}
new RealNumber( -2.0*(1.0 - vector[1].GetMod().X) )
});*/
//var b = new BfgsMethod();
//b.Minimize(f, g, 2);
//var x = b.Values;
//var fx = b.Minimum;
//return;
const int inputsCount = 5;
const int hiddenNeuronsCount = 11;
const int outputNeuronsCount = 3;
//var net = new SimpleFuzzyNet(inputsCount, new[] {hiddenNeuronsCount}, () => DiscreteFuzzyNumber.GenerateLittleNumber(levelsCount: 11), levelsCount: 11);
var net = new SimpleFuzzyNet(inputsCount, new[] { hiddenNeuronsCount, hiddenNeuronsCount}, RealNumber.GenerateLittleNumber, outputNeuronsCount: outputNeuronsCount);
/*
//weights for 2-2-1 net for XOR function
var weights = new Vector(new IFuzzyNumber[]
{
//output layer
//one neuron
new RealNumber(0.032680),
new RealNumber(0.020701),
//hidden 0
new RealNumber(-0.082843),
new RealNumber(0.018629),
new RealNumber(-0.011006),
new RealNumber(-0.071407),
});
net.SetWeights(weights);
*/
const string filename = "marketPatterns-params5-3outputs-learning.txt";
var numberParser = new RealNumberParser();
//const string filename = "testPatterns.txt";
//var numberParser = new FuzzyNumberParser();
//var patterns = new TestPatternPreparer(Path.Combine("../../../Misc", filename), numberParser).PreparePatterns();
var patterns = new MarketSeriesPatternPreparer(Path.Combine("../../../Misc", filename), numberParser).PreparePatterns();
//var patterns = CreatePatterns((x, y) => Math.Abs(Math.Sin(x) + Math.Sin(y))/2.0);
var bp = new BackPropagation(patterns, 0.05, 0.01);
bp.CyclePerformed +=
(state) =>
{
//Console.ReadKey();
if (state.Cycle%50 == 0)
{
Console.WriteLine("cycle: " + state.Cycle +
" error: " + state.CycleError.ToString("0.#####################"));
}
};
/*var bp = new BackPropagationWithPseudoNeuton(patterns);
bp.CyclePerformed +=
(state) =>
{
//Console.ReadKey();
//if (state.Cycle % 10 == 0)
Console.WriteLine("cycle: " + state.Cycle +
" error: " + state.CycleError.ToString("0.#########################"));
};*/
bp.LearnNet(net);
var key = new ConsoleKeyInfo();
do
{
while(Console.KeyAvailable == false)
Thread.Sleep(200);
key = Console.ReadKey();
} while (key.Key != ConsoleKey.Escape);
bp.StopLearning();
Console.WriteLine("Simple method finished");
var bp2 = new BackPropagationWithPseudoNeuton(patterns);
bp2.CyclePerformed +=
(state) =>
{
//Console.ReadKey();
//if (state.Cycle % 10 == 0)
Console.WriteLine("cycle: " + state.Cycle +
" error: " + state.CycleError.ToString("0.#########################"));
};
//bp2.LearnNet(net);
var key1 = new ConsoleKeyInfo();
do
{
while (Console.KeyAvailable == false)
Thread.Sleep(200);
key1 = Console.ReadKey();
} while (key1.Key != ConsoleKey.Escape);
bp2.StopLearning();
Console.WriteLine("Learning finished. Press any key...");
Console.ReadKey();
BinaryFileSerializer.SaveNetState(
"../../../Misc/LearnedNet " + Path.GetFileNameWithoutExtension(filename) +
" " + inputsCount + "-" + hiddenNeuronsCount + "-" + outputNeuronsCount + ".net", net);
var output = patterns.Select(pattern => net.Propagate(pattern.Input)).ToList();
for (int i = 0; i < patterns.Count; i++)
{
Console.WriteLine("Test: {0}, Real: {1}", string.Join(";", patterns.ElementAt(i).Output), string.Join(";", output.ElementAt(i)));
}
Console.WriteLine("Finished. Press any key...");
Console.ReadKey();
}
public void SetPropagatedErrorToNullAfterClear()
{
const int inputs = 2;
var hidden = new[] { 2, 2 };
var net = new SimpleFuzzyNet(inputs, hidden, () => new RealNumber(0.0));
SetPropagatedErrorToZero(net);
net.ClearPropagatedError();
foreach (var layer in net.Layers)
{
layer.ForeachNeuron((i, neuron) => Assert.IsNull(neuron.PropagatedError));
}
}
public void PropagateSignalWithZeroWeights()
{
const int inputs = 2;
var hidden = new[] { 2, 2 };
const int outputs = 2;
Func<double, double> activation = x => 1.0/(1.0 + Math.Exp(-x));
var net = new SimpleFuzzyNet(inputs, hidden, () => new RealNumber(0.0), activation, outputNeuronsCount: outputs);
var input = new List<IFuzzyNumber>
{
new RealNumber(1.0),
new RealNumber(2.0),
};
var output = net.Propagate(input);
var expected = new List<IFuzzyNumber>
{
new RealNumber(0.5),
new RealNumber(0.5),
};
int i = 0;
foreach (var expectedNumber in expected)
{
Assert.That(output.ElementAt(i).GetMod().X, Is.EqualTo(expectedNumber.GetMod().X));
i++;
}
}
public void PropagateSignalWithXMinusOneFunction()
{
const int inputs = 2;
var hidden = new[] { 2, 2 };
const int outputs = 2;
Func<double, double> activation = x => x - 1;
var net = new SimpleFuzzyNet(inputs, hidden, GenerateNumbers, activation, outputs);
var input = new List<IFuzzyNumber>
{
new RealNumber(1.0),
new RealNumber(2.0),
};
var output = net.Propagate(input);
var expected = new List<IFuzzyNumber>
{
new RealNumber(-23.0),
new RealNumber(-25.0),
};
int i = 0;
foreach (var expectedNumber in expected)
{
Assert.That(output.ElementAt(i).GetMod().X, Is.EqualTo(expectedNumber.GetMod().X));
i++;
}
}
public void PropagateSignalAfterWeightsChanged()
{
const int inputs = 2;
var hidden = new[] { 2, 2 };
const int outputs = 2;
Func<double, double> activation = x => x;
var net = new SimpleFuzzyNet(inputs, hidden, () => new RealNumber(0.0), activation, outputs);
var input = new List<IFuzzyNumber>
{
new RealNumber(1.0),
new RealNumber(2.0),
};
var weights = new Vector(new IFuzzyNumber[]
{
//output layer
//first neuron
new RealNumber(2.0),
new RealNumber(2.0),
//second neuron
new RealNumber(4.0),
new RealNumber(2.0),
//hidden 1
new RealNumber(1.0),
new RealNumber(-1.5),
new RealNumber(2.0),
new RealNumber(1.0),
//hidden 2
new RealNumber(-1.0),
new RealNumber(-1.0),
new RealNumber(2.0),
new RealNumber(-1.0),
});
net.SetWeights(weights);
var output = net.Propagate(input);
var expected = new List<IFuzzyNumber>
{
new RealNumber(-20.0),
new RealNumber(-24.0),
};
int i = 0;
foreach (var expectedNumber in expected)
{
Assert.That(output.ElementAt(i).GetMod().X, Is.EqualTo(expectedNumber.GetMod().X));
i++;
}
}
public void PropagateSignalAfterSomeWeightsChangedToZero()
{
const int inputs = 2;
var hidden = new[] { 2, 2 };
const int outputs = 2;
Func<double, double> activation = x => x;
var net = new SimpleFuzzyNet(inputs, hidden, GenerateNumbers, activation, outputs);
var input = new List<IFuzzyNumber>
{
new RealNumber(1.0),
new RealNumber(2.0),
};
net.Propagate(input);
ChangeFirstWeightsOfNeuronsToZero(net.Layers);
var output = net.Propagate(input);
var expected = new List<IFuzzyNumber>
{
new RealNumber(-4.0),
new RealNumber(-4.0),
};
int i = 0;
foreach (var expectedNumber in expected)
{
Assert.That(output.ElementAt(i).GetMod().X, Is.EqualTo(expectedNumber.GetMod().X));
i++;
}
}
public void CreateNulledLastInputsVectorAtStart()
{
const int inputs = 2;
var hidden = new[] { 2, 2 };
const int outputs = 2;
Func<double, double> activation = x => x;
var net = new SimpleFuzzyNet(inputs, hidden, () => new RealNumber(0.0), activation, outputs);
var lastInputs = net.GetLastInputsForWeights();
foreach (var input in lastInputs)
{
Assert.IsNull(input.Signal);
}
}
public void CreateCorrectLastInputsVectorAfterFirstPropagation()
{
const int inputs = 2;
var hidden = new[] { 2, 2 };
const int outputs = 2;
Func<double, double> activation = x => x;
var net = new SimpleFuzzyNet(inputs, hidden, GenerateNumbers, activation, outputs);
var input = new List<IFuzzyNumber>
{
new RealNumber(1.0),
new RealNumber(2.0),
};
var lastInputsLinks = net.GetLastInputsForWeights();
net.Propagate(input);
var lastInputs = lastInputsLinks.ToSignalsVector();
var expectedLastInputs = new IFuzzyNumber[]
{
//output layer
//first neuron
new RealNumber(-2.0),
new RealNumber(-8.0),
//second neuron
new RealNumber(-2.0),
new RealNumber(-8.0),
//hidden 1
new RealNumber(1.0),
new RealNumber(2.0),
new RealNumber(1.0),
new RealNumber(2.0),
//hidden 2
new RealNumber(-2.0),
new RealNumber(4.0),
new RealNumber(-2.0),
new RealNumber(4.0),
};
for (int i = 0; i < expectedLastInputs.Length; i++)
{
Assert.That(lastInputs[i].GetMod().X, Is.EqualTo(expectedLastInputs[i].GetMod().X));
}
}
public void CorrectlySetWeightsVector()
{
const int inputs = 2;
var hidden = new[] { 2, 2 };
const int outputs = 2;
var net = new SimpleFuzzyNet(inputs, hidden, ()=>new RealNumber(0.0), outputNeuronsCount: outputs);
var weights = new Vector(new IFuzzyNumber[]
{
//output layer
//first neuron
new RealNumber(2.0),
new RealNumber(2.0),
//second neuron
new RealNumber(4.0),
new RealNumber(2.0),
//hidden 1
new RealNumber(1.0),
new RealNumber(-1.5),
new RealNumber(2.0),
new RealNumber(1.0),
//hidden 2
new RealNumber(-1.0),
new RealNumber(-1.0),
new RealNumber(2.0),
new RealNumber(-1.0),
});
//tuple: (layer, neuron, weight)
var expectedWeights = new Dictionary<Tuple<int, int, int>, IFuzzyNumber>();
for (int i = 0; i < weights.Length; i++)
{
expectedWeights.Add(new Tuple<int, int, int>(ToLayerIndex(i), ToNeuronIndex(i), ToWeightIndex(i)),
weights[i]);
}
net.SetWeights(weights);
int l = 0;
foreach (var layer in net.Layers)
{
layer.ForeachNeuron((i, neuron) =>
{
neuron.ForeachWeight((j, weight) =>
{
Assert.That(weight.Signal.GetMod().X,
Is.EqualTo(expectedWeights[new Tuple<int, int, int>(l, i, j)].GetMod().X));
});
});
l++;
}
}
public void CorrectlyReturnNumberOfWeights()
{
const int inputs = 5;
var hidden = new[] {7, 2};
const int output = 1;
var net = new SimpleFuzzyNet(inputs, hidden, RealNumber.GenerateLittleNumber);
var weightsCount = net.WeightsCount;
Assert.That(weightsCount, Is.EqualTo(inputs * hidden[0] + hidden[0] * hidden[1] + hidden[1] * output));
}
public void CorrectlyGetWeightsOfNextLayer()
{
const int inputs = 2;
var hidden = new[] { 2, 2 };
const int outputs = 2;
var net = new SimpleFuzzyNet(inputs, hidden, GenerateNumbers, outputNeuronsCount: outputs);
var weights = new Vector(new IFuzzyNumber[]
{
//output layer
//first neuron
new RealNumber(2.0),
new RealNumber(2.0),
//second neuron
new RealNumber(4.0),
new RealNumber(2.0),
//hidden 1
new RealNumber(1.0),
new RealNumber(-1.5),
new RealNumber(2.0),
new RealNumber(1.0),
//hidden 2
new RealNumber(-1.0),
new RealNumber(-1.0),
new RealNumber(2.0),
new RealNumber(-1.0),
});
//tuple: (layer, neuron, weight)
var expectedWeights = new Dictionary<Tuple<int, int, int>, IFuzzyNumber>();
for (int i = 0; i < weights.Length; i++)
{
expectedWeights.Add(new Tuple<int, int, int>(ToLayerIndex(i), ToNeuronIndex(i), ToWeightIndex(i)),
weights[i]);
}
for (int i = net.Layers.Count - 2; i >= 0; i--)
{
var layer = net.Layers.ElementAt(i);
var nextLayer = net.Layers.ElementAt(i + 1);
layer.ForeachNeuron((neuronIndex, neuron) =>
{
for (int j = 0; j < nextLayer.NeuronsCount; j++)
{
var weight = nextLayer.GetNeuron(j).GetWeight(neuronIndex).Signal;
Assert.That(weight.GetMod().X,
Is.EqualTo(expectedWeights[new Tuple<int, int, int>(i + 1, j, neuronIndex)].GetMod().X));
}
});
}
}
public void CorrectlyCreateWeightsVector()
{
const int inputs = 2;
var hidden = new[] { 2, 2 };
const int outputs = 2;
var net = new SimpleFuzzyNet(inputs, hidden, GenerateNumbers, outputNeuronsCount: outputs);
var weights = net.GetWeights();
var expectedWeights = new Vector(new IFuzzyNumber[]
{
//output layer
//first neuron
new RealNumber(2.0),
new RealNumber(2.0),
//second neuron
new RealNumber(4.0),
new RealNumber(2.0),
//hidden 1
new RealNumber(1.0),
new RealNumber(-1.5),
new RealNumber(2.0),
new RealNumber(1.0),
//hidden 2
new RealNumber(-1.0),
new RealNumber(-1.0),
new RealNumber(2.0),
new RealNumber(-1.0),
});
for (int i = 0; i < expectedWeights.Length; i++)
{
Assert.That(weights[i].GetMod().X, Is.EqualTo(expectedWeights[i].GetMod().X));
}
}
