/// <summary>
/// Selects the chromosomes which will be reinserted.
/// </summary>
/// <returns>The chromosomes to be reinserted in next generation..</returns>
/// <param name="population">The population.</param>
/// <param name="offspring">The offspring.</param>
/// <param name="parents">The parents.</param>
public IList<IChromosome> SelectChromosomes(Population population, IList<IChromosome> offspring, IList<IChromosome> parents)
{
ExceptionHelper.ThrowIfNull("population", population);
ExceptionHelper.ThrowIfNull("offspring", offspring);
ExceptionHelper.ThrowIfNull("parents", parents);
if (!CanExpand && offspring.Count < population.MinSize) {
throw new ReinsertionException (this, "Cannot expand the number of chromosome in population. Try another reinsertion!");
}
if (!CanCollapse && offspring.Count > population.MaxSize) {
throw new ReinsertionException (this, "Cannot collapse the number of chromosome in population. Try another reinsertion!");
}
return PerformSelectChromosomes (population, offspring, parents);
}
public void Evolve_ManyGenerations_Fast()
{
int numberOfCities = 40;
var selection = new EliteSelection();
var crossover = new OrderedCrossover();
var mutation = new TworsMutation();
var chromosome = new TspChromosome(numberOfCities);
var fitness = new TspFitness (numberOfCities, 0, 1000, 0, 1000);
var population = new Population (40, 40, chromosome);
var ga = new GeneticAlgorithm(population, fitness, selection, crossover, mutation);
ga.Start();
var firstDistance = ((TspChromosome)ga.Population.BestChromosome).Distance;
ga.Termination = new GenerationNumberTermination (1001);
TimeAssert.LessThan(3000, () =>
{
ga.Start();
});
var lastDistance = ((TspChromosome)ga.Population.BestChromosome).Distance;
Assert.Less(lastDistance, firstDistance);
}
public void SelectChromosomes_offspringSizeGreaterThanMaxSize_Selectoffspring()
{
var target = new FitnessBasedReinsertion ();
var population = new Population (2, 3, MockRepository.GenerateStub<ChromosomeBase> (2));
var offspring = new List<IChromosome> () {
MockRepository.GenerateStub<ChromosomeBase> (2),
MockRepository.GenerateStub<ChromosomeBase> (2),
MockRepository.GenerateStub<ChromosomeBase> (3),
MockRepository.GenerateStub<ChromosomeBase> (4)
};
offspring [0].Fitness = 0.2;
offspring [1].Fitness = 0.3;
offspring [2].Fitness = 0.5;
offspring [3].Fitness = 0.7;
var parents = new List<IChromosome> () {
MockRepository.GenerateStub<ChromosomeBase> (5),
MockRepository.GenerateStub<ChromosomeBase> (6),
MockRepository.GenerateStub<ChromosomeBase> (7),
MockRepository.GenerateStub<ChromosomeBase> (8)
};
var selected = target.SelectChromosomes (population, offspring, parents);
Assert.AreEqual (3, selected.Count);
Assert.AreEqual (4, selected [0].Length);
Assert.AreEqual (3, selected [1].Length);
Assert.AreEqual (2, selected [2].Length);
}
public void SelectChromosomes_offspringSizeLowerThanMinSize_Selectoffspring()
{
var target = new UniformReinsertion();
var population = new Population(6, 8, MockRepository.GenerateStub<ChromosomeBase>(2));
var offspring = new List<IChromosome>() {
MockRepository.GenerateStub<ChromosomeBase> (2),
MockRepository.GenerateStub<ChromosomeBase> (2),
MockRepository.GenerateStub<ChromosomeBase> (3),
MockRepository.GenerateStub<ChromosomeBase> (4)
};
var parents = new List<IChromosome>() {
MockRepository.GenerateStub<ChromosomeBase> (5),
MockRepository.GenerateStub<ChromosomeBase> (6),
MockRepository.GenerateStub<ChromosomeBase> (7),
MockRepository.GenerateStub<ChromosomeBase> (8)
};
var rnd = MockRepository.GenerateMock<IRandomization>();
rnd.Expect(r => r.GetInt(0, 4)).Return(1);
rnd.Expect(r => r.GetInt(0, 5)).Return(3);
RandomizationProvider.Current = rnd;
var selected = target.SelectChromosomes(population, offspring, parents);
Assert.AreEqual(6, selected.Count);
Assert.AreEqual(2, selected[0].Length);
Assert.AreEqual(2, selected[1].Length);
Assert.AreEqual(3, selected[2].Length);
Assert.AreEqual(4, selected[3].Length);
Assert.AreEqual(2, selected[4].Length);
Assert.AreEqual(4, selected[5].Length);
}
public void Evolve_ManyGenerations_Fast()
{
var selection = new EliteSelection();
var crossover = new UniformCrossover();
var mutation = new UniformMutation(true);
var chromosome = new AutoConfigChromosome();
var targetChromosome = new TspChromosome(10);
var targetFitness = new TspFitness(10, 0, 100, 0, 100);
var fitness = new AutoConfigFitness(targetFitness, targetChromosome);
fitness.PopulationMinSize = 20;
fitness.PopulationMaxSize = 20;
fitness.Termination = new TimeEvolvingTermination(TimeSpan.FromSeconds(5));
var population = new Population(10, 10, chromosome);
var ga = new GeneticAlgorithm(population, fitness, selection, crossover, mutation);
ga.TaskExecutor = new SmartThreadPoolTaskExecutor()
{
MinThreads = 10,
MaxThreads = 20
};
ga.Termination = new GenerationNumberTermination(2);
ga.Start();
Assert.NotNull(ga.BestChromosome);
}
public void Evolve_ManyGenerations_Fast()
{
var selection = new EliteSelection();
var crossover = new ThreeParentCrossover();
var mutation = new UniformMutation(true);
var fitness = new FunctionBuilderFitness(
new FunctionBuilderInput(
new double[] { 1, 2, 3 },
6)
,
new FunctionBuilderInput(
new double[] { 2, 3, 4 },
24)
);
var chromosome = new FunctionBuilderChromosome(fitness.AvailableOperations, 5);
var population = new Population(100, 200, chromosome);
var ga = new GeneticAlgorithm(population, fitness, selection, crossover, mutation);
ga.Termination = new FitnessThresholdTermination(0);
ga.Start();
var bestChromosome = ga.BestChromosome as FunctionBuilderChromosome;
Assert.AreEqual(0.0, bestChromosome.Fitness.Value);
var actual = fitness.GetFunctionResult(
bestChromosome.BuildFunction(),
new FunctionBuilderInput(new double[] { 3, 4, 5 }, 60)
);
Assert.AreEqual(60.0, actual);
}
public void SelectChromosomes_offspringSizeLowerThanMinSize_Selectoffspring()
{
var target = new ElitistReinsertion ();
var population = new Population (6, 8, MockRepository.GenerateStub<ChromosomeBase> (2));
var offspring = new List<IChromosome> () {
MockRepository.GenerateStub<ChromosomeBase> (2),
MockRepository.GenerateStub<ChromosomeBase> (2),
MockRepository.GenerateStub<ChromosomeBase> (3),
MockRepository.GenerateStub<ChromosomeBase> (4)
};
var parents = new List<IChromosome> () {
MockRepository.GenerateStub<ChromosomeBase> (5),
MockRepository.GenerateStub<ChromosomeBase> (6),
MockRepository.GenerateStub<ChromosomeBase> (7),
MockRepository.GenerateStub<ChromosomeBase> (8)
};
parents [0].Fitness = 0.2;
parents [1].Fitness = 0.3;
parents [2].Fitness = 0.5;
parents [3].Fitness = 0.7;
var selected = target.SelectChromosomes (population, offspring, parents);
Assert.AreEqual (6, selected.Count);
Assert.AreEqual (2, selected [0].Length);
Assert.AreEqual (2, selected [1].Length);
Assert.AreEqual (3, selected [2].Length);
Assert.AreEqual (4, selected [3].Length);
Assert.AreEqual (8, selected [4].Length);
Assert.AreEqual (7, selected [5].Length);
}
public void Evolve_ManyGenerations_Fast()
{
int movesAhead = 10;
int boardSize = 10;
var selection = new EliteSelection();
var crossover = new OrderedCrossover();
var mutation = new TworsMutation();
var chromosome = new CheckersChromosome(movesAhead, boardSize);
var fitness = new CheckersFitness(new CheckersBoard(boardSize));
var population = new Population(40, 40, chromosome);
var ga = new GeneticAlgorithm(population, fitness, selection, crossover, mutation);
ga.GenerationRan += delegate
{
if (ga.Population.GenerationsNumber % 100 == 0)
{
fitness.Update(ga.Population.BestChromosome as CheckersChromosome);
}
};
ga.Start();
var firstFitness = ((CheckersChromosome)ga.Population.BestChromosome).Fitness;
ga.Termination = new GenerationNumberTermination(2001);
TimeAssert.LessThan(100000, () =>
{
ga.Start();
});
var lastFitness = ((CheckersChromosome)ga.Population.BestChromosome).Fitness;
Assert.LessOrEqual(firstFitness, lastFitness);
}
/// <summary>
/// Selects the chromosomes which will be reinserted.
/// </summary>
/// <returns>The chromosomes to be reinserted in next generation..</returns>
/// <param name="population">The population.</param>
/// <param name="offspring">The offspring.</param>
/// <param name="parents">The parents.</param>
protected override IList<IChromosome> PerformSelectChromosomes(Population population, IList<IChromosome> offspring, IList<IChromosome> parents)
{
if (offspring.Count > population.MaxSize) {
return offspring.OrderByDescending (o => o.Fitness).Take (population.MaxSize).ToList ();
}
return offspring;
}
public void CreateInitialGeneration_AdamChromosomeCreateNewNull_Exception()
{
var population = new Population(2, 2, MockRepository.GenerateStub<ChromosomeBase>(4));
ExceptionAssert.IsThrowing(new InvalidOperationException("The Adam chromosome's 'CreateNew' method generated a null chromosome. This is a invalid behavior, please, check your chromosome code."), () =>
{
population.CreateInitialGeneration();
});
}
/// <summary>
/// Register that a new generation has been created.
/// </summary>
/// <param name="population">The population where the new generation has been created.</param>
public void RegisterNewGeneration(Population population)
{
ExceptionHelper.ThrowIfNull("population", population);
if (population.Generations.Count > GenerationsNumber)
{
population.Generations.RemoveAt(0);
}
}
public void SelectChromosomes_ParentsNull_Exception()
{
var target = MockRepository.GeneratePartialMock<ReinsertionBase>(false, false);
var chromosome = MockRepository.GenerateStub<ChromosomeBase>(2);
var population = new Population(5, 6, chromosome);
var offspring = new List<IChromosome>() {
chromosome, chromosome, chromosome, chromosome
};
ExceptionAssert.IsThrowing(new ArgumentNullException("parents"), () =>
{
target.SelectChromosomes(population, offspring, null);
});
}
/// <summary>
/// Selects the chromosomes which will be reinserted.
/// </summary>
/// <returns>The chromosomes to be reinserted in next generation..</returns>
/// <param name="population">The population.</param>
/// <param name="offspring">The offspring.</param>
/// <param name="parents">The parents.</param>
protected override IList<IChromosome> PerformSelectChromosomes(Population population, IList<IChromosome> offspring, IList<IChromosome> parents)
{
var diff = population.MinSize - offspring.Count;
if (diff > 0) {
var bestParents = parents.OrderByDescending (p => p.Fitness).Take (diff);
foreach (var p in bestParents) {
offspring.Add (p);
}
}
return offspring;
}
/// <summary>
/// Selects the chromosomes which will be reinserted.
/// </summary>
/// <returns>The chromosomes to be reinserted in next generation..</returns>
/// <param name="population">The population.</param>
/// <param name="offspring">The offspring.</param>
/// <param name="parents">The parents.</param>
protected override IList<IChromosome> PerformSelectChromosomes(Population population, IList<IChromosome> offspring, IList<IChromosome> parents)
{
if (offspring.Count == 0)
{
throw new ReinsertionException(this, "The minimum size of the offspring is 1.");
}
var rnd = RandomizationProvider.Current;
while (offspring.Count < population.MinSize) {
offspring.Add (offspring [rnd.GetInt (0, offspring.Count)]);
}
return offspring;
}
public void EndCurrentGeneration_BestChromosomeChanged_ChangeEventRaise()
{
var target = new Population(2, 2, new ChromosomeStub());
var eventRaise = false;
target.BestChromosomeChanged += (e, a) =>
{
eventRaise = true;
};
target.CreateInitialGeneration();
target.CurrentGeneration.Chromosomes.Each(c => c.Fitness = 1);
target.CurrentGeneration.BestChromosome = target.CurrentGeneration.Chromosomes[0];
target.EndCurrentGeneration();
Assert.IsTrue(eventRaise);
}
public double TrainNeuralNetwork()
{
var chromosome = new KasandraChromosome(_fitness.TotalNumberOfWeights);
var population = new Population(minPopulation, maxPopulation, chromosome);
_geneticAlgorithm = new GeneticAlgorithm(population, _fitness, new EliteSelection(), new UniformCrossover(), new UniformMutation(true));
_geneticAlgorithm.MutationProbability = mutationRate;
_geneticAlgorithm.CrossoverProbability = crossoverProbabilty;
_geneticAlgorithm.Termination = new GenerationNumberTermination(maxIterations);
_geneticAlgorithm.TerminationReached += _geneticAlgorithm_TerminationReached;
_geneticAlgorithm.GenerationRan += _geneticAlgorithm_GenerationRan;
_geneticAlgorithm.Start();
return 0;
}
public void SelectChromosomes_OffspringSizeEqualsZero_Exception()
{
var target = new UniformReinsertion();
var population = new Population(6, 8, MockRepository.GenerateStub<ChromosomeBase>(2));
var offspring = new List<IChromosome>();
var parents = new List<IChromosome>() {
MockRepository.GenerateStub<ChromosomeBase> (5),
MockRepository.GenerateStub<ChromosomeBase> (6),
MockRepository.GenerateStub<ChromosomeBase> (7),
MockRepository.GenerateStub<ChromosomeBase> (8)
};
ExceptionAssert.IsThrowing(new ReinsertionException(target, "The minimum size of the offspring is 1."), () =>
{
target.SelectChromosomes(population, offspring, parents);
});
}
static void Main(string[] args)
{
var selection = new EliteSelection();
var crossover = new OnePointCrossover(0);
var mutation = new UniformMutation(true);
var fitness = new Issue1Fitness();
var chromosome = new Issue1Chromosome();
var population = new Population(50, 50, chromosome);
var ga = new GeneticAlgorithm(population, fitness, selection, crossover, mutation);
ga.Termination = new GenerationNumberTermination(100);
Console.WriteLine("GA running...");
ga.Start();
Console.WriteLine("GA done in {0} generations.", ga.GenerationsNumber);
var bestChromosome = ga.BestChromosome as Issue1Chromosome;
Console.WriteLine("Best solution found is X:{0}, Y:{1} with {2} fitness.", bestChromosome.X, bestChromosome.Y, bestChromosome.Fitness);
Console.ReadKey();
}
public void SelectChromosomes_CanExpandFalseWithoffspringSizeLowerThanMinSize_Exception()
{
var target = MockRepository.GeneratePartialMock<ReinsertionBase>(false, false);
var chromosome = MockRepository.GenerateStub<ChromosomeBase> (2);
var population = new Population (5, 6, chromosome);
var offspring = new List<IChromosome> () {
chromosome, chromosome, chromosome, chromosome
};
var parents = new List<IChromosome> () {
MockRepository.GenerateStub<ChromosomeBase> (2),
MockRepository.GenerateStub<ChromosomeBase> (2),
MockRepository.GenerateStub<ChromosomeBase> (2),
MockRepository.GenerateStub<ChromosomeBase> (2)
};
ExceptionAssert.IsThrowing (new ReinsertionException (target, "Cannot expand the number of chromosome in population. Try another reinsertion!"), () => {
target.SelectChromosomes(population, offspring, parents);
});
}
public void RegisterNewGeneration_AnyGeneration_DoNothing()
{
var target = new TrackingGenerationStrategy();
var population = new Population(2, 6, new ChromosomeStub());
population.CreateInitialGeneration();
target.RegisterNewGeneration(population);
Assert.AreEqual(1, population.Generations.Count);
population.CreateNewGeneration(new List<IChromosome>() { new ChromosomeStub(), new ChromosomeStub() });
target.RegisterNewGeneration(population);
Assert.AreEqual(2, population.Generations.Count);
population.CreateNewGeneration(new List<IChromosome>() { new ChromosomeStub(), new ChromosomeStub() });
target.RegisterNewGeneration(population);
Assert.AreEqual(3, population.Generations.Count);
population.CreateNewGeneration(new List<IChromosome>() { new ChromosomeStub(), new ChromosomeStub() });
target.RegisterNewGeneration(population);
Assert.AreEqual(4, population.Generations.Count);
}
public void SelectChromosomes_CanCollapseAndExpandFalseWithoffspringSizeBetweenMinOrMaxSize_ChromosomesSelected()
{
var target = MockRepository.GeneratePartialMock<ReinsertionBase>(false, false);
var chromosome = MockRepository.GenerateStub<ChromosomeBase> (2);
var population = new Population (2, 5, chromosome);
var offspring = new List<IChromosome> () {
chromosome, chromosome, chromosome, chromosome
};
var parents = new List<IChromosome> () {
MockRepository.GenerateStub<ChromosomeBase> (2),
MockRepository.GenerateStub<ChromosomeBase> (2),
MockRepository.GenerateStub<ChromosomeBase> (2),
MockRepository.GenerateStub<ChromosomeBase> (2)
};
ExceptionAssert.IsThrowing (typeof(Rhino.Mocks.Exceptions.ExpectationViolationException), () => {
target.SelectChromosomes (population, offspring, parents);
});
}
public void RegisterNewGeneration_GenerationExceedGenerationsNumber_RemoveOldOne()
{
var target = new PerformanceGenerationStrategy();
var population = new Population(2, 6, new ChromosomeStub());
population.CreateInitialGeneration();
target.RegisterNewGeneration(population);
Assert.AreEqual(1, population.Generations.Count);
population.CreateNewGeneration(new List<IChromosome>() { new ChromosomeStub(), new ChromosomeStub() });
target.RegisterNewGeneration(population);
Assert.AreEqual(1, population.Generations.Count);
population.CreateNewGeneration(new List<IChromosome>() { new ChromosomeStub(), new ChromosomeStub() });
target.RegisterNewGeneration(population);
Assert.AreEqual(1, population.Generations.Count);
population.CreateNewGeneration(new List<IChromosome>() { new ChromosomeStub(), new ChromosomeStub() });
target.RegisterNewGeneration(population);
Assert.AreEqual(1, population.Generations.Count);
}
public double Evaluate(IChromosome chromosome)
{
var autoConfigChromosome = chromosome as AutoConfigChromosome;
var selection = autoConfigChromosome.Selection;
var crossover = autoConfigChromosome.Crossover;
var mutation = autoConfigChromosome.Mutation;
var population = new Population(PopulationMinSize, PopulationMaxSize, m_targetChromosome);
var ga = new GeneticAlgorithm(population, m_targetFitness, selection, crossover, mutation);
ga.Termination = Termination;
ga.TaskExecutor = TaskExecutor;
try
{
ga.Start();
}
catch (Exception)
{
return 0;
}
return ga.BestChromosome.Fitness.Value;
}
public void SelectChromosomes_offspringSizeEqualsParentsSizeAndGreaterThanMinSizeAndLowerThanMaxSize_Selectoffspring()
{
var target = new PureReinsertion ();
var chromosome = MockRepository.GenerateStub<ChromosomeBase> (2);
var population = new Population (2, 6, chromosome);
var offspring = new List<IChromosome> () {
chromosome, chromosome, chromosome, chromosome
};
var parents = new List<IChromosome> () {
MockRepository.GenerateStub<ChromosomeBase> (2),
MockRepository.GenerateStub<ChromosomeBase> (2),
MockRepository.GenerateStub<ChromosomeBase> (2),
MockRepository.GenerateStub<ChromosomeBase> (2)
};
var selected = target.SelectChromosomes (population, offspring, parents);
Assert.AreEqual (4, selected.Count);
Assert.AreEqual (2, selected [0].Length);
Assert.AreEqual (2, selected [1].Length);
Assert.AreEqual (2, selected [2].Length);
Assert.AreEqual (2, selected [3].Length);
}
/// <summary> /// Selects the chromosomes which will be reinserted. /// </summary> /// <returns>The chromosomes to be reinserted in next generation..</returns> /// <param name="population">The population.</param> /// <param name="offspring">The offspring.</param> /// <param name="parents">The parents.</param> protected abstract IList<IChromosome> PerformSelectChromosomes(Population population, IList<IChromosome> offspring, IList<IChromosome> parents);
/// <summary>
/// Initializes a new instance of the <see cref="GeneticSharp.Domain.GeneticAlgorithm"/> class.
/// </summary>
/// <param name="population">The chromosomes population.</param>
/// <param name="fitness">The fitness evaluation function.</param>
/// <param name="selection">The selection operator.</param>
/// <param name="crossover">The crossover operator.</param>
/// <param name="mutation">The mutation operator.</param>
public GeneticAlgorithm(
Population population,
IFitness fitness,
ISelection selection,
ICrossover crossover,
IMutation mutation)
{
ExceptionHelper.ThrowIfNull("Population", population);
ExceptionHelper.ThrowIfNull("fitness", fitness);
ExceptionHelper.ThrowIfNull("selection", selection);
ExceptionHelper.ThrowIfNull("crossover", crossover);
ExceptionHelper.ThrowIfNull("mutation", mutation);
Population = population;
Fitness = fitness;
Selection = selection;
Crossover = crossover;
Mutation = mutation;
Reinsertion = new ElitistReinsertion();
Termination = new GenerationNumberTermination(1);
CrossoverProbability = DefaultCrossoverProbability;
MutationProbability = DefaultMutationProbability;
TimeEvolving = TimeSpan.Zero;
State = GeneticAlgorithmState.NotStarted;
TaskExecutor = new LinearTaskExecutor();
}
static void Main(string[] args)
{
Console.ForegroundColor = ConsoleColor.DarkGreen;
Console.WriteLine("GeneticSharp - ConsoleApp");
Console.ResetColor();
Console.WriteLine("Select the sample:");
Console.WriteLine("1) TSP (Travelling Salesman Problem)");
Console.WriteLine("2) Ghostwriter");
var sampleNumber = Console.ReadLine();
ISampleController sampleController = null;
switch (sampleNumber)
{
case "1":
sampleController = new TspSampleController(20);
break;
case "2":
sampleController = new GhostwriterSampleController();
break;
default:
return;
}
var selection = new EliteSelection();
var crossover = new UniformCrossover();
var mutation = new UniformMutation(true);
var fitness = sampleController.CreateFitness();
var population = new Population(50, 70, sampleController.CreateChromosome());
var ga = new GeneticAlgorithm(population, fitness, selection, crossover, mutation);
ga.MutationProbability = 0.4f;
ga.Termination = new FitnessStagnationTermination(100);
ga.TaskExecutor = new SmartThreadPoolTaskExecutor()
{
MinThreads = 25,
MaxThreads = 50
};
ga.GenerationRan += delegate
{
Console.CursorLeft = 0;
Console.CursorTop = 5;
var bestChromosome = ga.Population.BestChromosome;
Console.WriteLine("Generations: {0}", ga.Population.GenerationsNumber);
Console.WriteLine("Fitness: {0:n4}", bestChromosome.Fitness);
Console.WriteLine("Time: {0}", ga.TimeEvolving);
sampleController.Draw(bestChromosome);
};
try
{
ga.Start();
}
catch (Exception ex)
{
Console.ForegroundColor = ConsoleColor.DarkRed;
Console.WriteLine();
Console.WriteLine("Error: {0}", ex.Message);
Console.ResetColor();
Console.ReadKey();
return;
}
Console.ForegroundColor = ConsoleColor.DarkGreen;
Console.WriteLine();
Console.WriteLine("Evolved.");
Console.ResetColor();
Console.ReadKey();
}
private static void Run()
{
Console.SetError(TextWriter.Null);
Console.Clear();
Console.ForegroundColor = ConsoleColor.DarkGreen;
Console.WriteLine("GeneticSharp - ConsoleApp");
Console.ResetColor();
Console.WriteLine("Select the sample:");
var sampleNames = TypeHelper.GetDisplayNamesByInterface<ISampleController>();
for (int i = 0; i < sampleNames.Count; i++)
{
Console.WriteLine("{0}) {1}", i + 1, sampleNames[i]);
}
int sampleNumber = 0;
string selectedSampleName = string.Empty;
try
{
sampleNumber = Convert.ToInt32(Console.ReadLine());
selectedSampleName = sampleNames[sampleNumber - 1];
}
catch (Exception)
{
Console.WriteLine("Invalid option.");
}
var sampleController = TypeHelper.CreateInstanceByName<ISampleController>(selectedSampleName);
DrawSampleName(selectedSampleName);
sampleController.Initialize();
Console.WriteLine("Starting...");
var selection = sampleController.CreateSelection();
var crossover = sampleController.CreateCrossover();
var mutation = sampleController.CreateMutation();
var fitness = sampleController.CreateFitness();
var population = new Population(100, 200, sampleController.CreateChromosome());
population.GenerationStrategy = new PerformanceGenerationStrategy();
var ga = new GeneticAlgorithm(population, fitness, selection, crossover, mutation);
ga.Termination = sampleController.CreateTermination();
var terminationName = ga.Termination.GetType().Name;
ga.GenerationRan += delegate
{
DrawSampleName(selectedSampleName);
var bestChromosome = ga.Population.BestChromosome;
Console.WriteLine("Termination: {0}", terminationName);
Console.WriteLine("Generations: {0}", ga.Population.GenerationsNumber);
Console.WriteLine("Fitness: {0,10}", bestChromosome.Fitness);
Console.WriteLine("Time: {0}", ga.TimeEvolving);
sampleController.Draw(bestChromosome);
};
try
{
sampleController.ConfigGA(ga);
ga.Start();
}
catch (Exception ex)
{
Console.ForegroundColor = ConsoleColor.DarkRed;
Console.WriteLine();
Console.WriteLine("Error: {0}", ex.Message);
Console.ResetColor();
Console.ReadKey();
return;
}
Console.ForegroundColor = ConsoleColor.DarkGreen;
Console.WriteLine();
Console.WriteLine("Evolved.");
Console.ResetColor();
Console.ReadKey();
Run();
}
/// <summary>
/// Register that a new generation has been created.
/// </summary>
/// <param name="population">The population where the new generation has been created.</param>
public void RegisterNewGeneration(Population population)
{
// Do nothing, because wants to keep all generations in the line.
}
/// <summary>
/// Selects the chromosomes which will be reinserted.
/// </summary>
/// <returns>The chromosomes to be reinserted in next generation..</returns>
/// <param name="population">The population.</param>
/// <param name="offspring">The offspring.</param>
/// <param name="parents">The parents.</param>
protected override IList<IChromosome> PerformSelectChromosomes(Population population, IList<IChromosome> offspring, IList<IChromosome> parents)
{
return offspring;
}
/// <summary>
/// Loads presetsProfile into service.
/// </summary>
/// <exception cref="T:System.InvalidOperationException">Thrown when an attempt to load presetsProfile twice is made.</exception>
public void AddGeneticAlgorithm(GADefinition definition, Guid Key)
{
var chromosome = new FloatingPointChromosome(
minValue: new double[] { 0, 0, 0, 0 },
maxValue: new double[] { _maxWidth, _maxHeight, _maxWidth, _maxHeight },
totalBits: new int[] { 20, 20, 20, 20 },
fractionDigits: new int[] { 0, 0, 0, 0 }, geneValues: _geneValues);
ICrossover gaCrossover = default;
switch (definition.Crossover)
{
case Crossovers.Uniform:
gaCrossover = new UniformCrossover(mixProbability: 0.5f);
break;
case Crossovers.OnePoint:
gaCrossover = new OnePointCrossover(swapPointIndex: 40);
break;
case Crossovers.ThreeParent:
gaCrossover = new ThreeParentCrossover();
break;
default:
throw new ArgumentOutOfRangeException(paramName: nameof(definition.Crossover),
actualValue: definition.Crossover, message: "Crossover has wrong value");
}
ISelection gaSelection = default;
switch (definition.Selection)
{
case Selections.Elite:
gaSelection = new EliteSelection();
break;
case Selections.Roulette:
gaSelection = new RouletteWheelSelection();
break;
case Selections.Tournament:
gaSelection = new TournamentSelection(
size: decimal.ToInt32(d: decimal.Multiply(definition.Population, new decimal(0.2f))));
break;
case Selections.StohasticUniversalSampling:
gaSelection = new StochasticUniversalSamplingSelection();
break;
default:
throw new ArgumentOutOfRangeException(paramName: nameof(definition.Selection),
actualValue: definition.Selection, message: "Selection has wrong value");
}
var gaMutation = new UniformMutation(true);
var gaPopulation = new Population(minSize: definition.Population,
maxSize: definition.Population, adamChromosome: chromosome);
var ga = new GeneticAlgorithm(population: gaPopulation,
fitness: new EuclideanDistanceFitness(), selection: gaSelection,
crossover: gaCrossover, mutation: gaMutation);
ga.MutationProbability = (float)definition.Mutation;
ga.GenerationRan += GeneticAlgorithmOnGenerationRan;
ga.Termination =
new FitnessStagnationTermination(expectedStagnantGenerationsNumber: 5);
_geneticAlgorithms.Add(key: Key, value: ga);
}
