/// <summary> /// Create and return a NeatEvolutionAlgorithm object ready for running the NEAT algorithm/search. Various sub-parts /// of the algorithm are also constructed and connected up. /// This overload accepts a pre-built genome population and their associated/parent genome factory. /// </summary> public NeatEvolutionAlgorithm <NeatGenome> CreateEvolutionAlgorithm(IGenomeFactory <NeatGenome> genomeFactory, List <NeatGenome> genomeList) { // Create distance metric. Mismatched genes have a fixed distance of 10; for matched genes the distance is their weigth difference. IDistanceMetric distanceMetric = new ManhattanDistanceMetric(1.0, 0.0, 10.0); ISpeciationStrategy <NeatGenome> speciationStrategy = new ParallelKMeansClusteringStrategy <NeatGenome>(distanceMetric, _parallelOptions); // Create complexity regulation strategy. IComplexityRegulationStrategy complexityRegulationStrategy = ExperimentUtils.CreateComplexityRegulationStrategy(_complexityRegulationStr, _complexityThreshold); // Create the evolution algorithm. NeatEvolutionAlgorithm <NeatGenome> ea = new NeatEvolutionAlgorithm <NeatGenome>(_eaParams, speciationStrategy, complexityRegulationStrategy); // Create IBlackBox evaluator. FunctionRegressionEvaluator evaluator = new FunctionRegressionEvaluator(_paramSamplingInfoArr, _func); // Create genome decoder. IGenomeDecoder <NeatGenome, IBlackBox> genomeDecoder = CreateGenomeDecoder(); // Create a genome list evaluator. This packages up the genome decoder with the genome evaluator. IGenomeListEvaluator <NeatGenome> innerEvaluator = new ParallelGenomeListEvaluator <NeatGenome, IBlackBox>(genomeDecoder, evaluator, _parallelOptions); // Wrap the list evaluator in a 'selective' evaulator that will only evaluate new genomes. That is, we skip re-evaluating any genomes // that were in the population in previous generations (elite genomes). This is determiend by examining each genome's evaluation info object. IGenomeListEvaluator <NeatGenome> selectiveEvaluator = new SelectiveGenomeListEvaluator <NeatGenome>( innerEvaluator, SelectiveGenomeListEvaluator <NeatGenome> .CreatePredicate_OnceOnly()); // Initialize the evolution algorithm. ea.Initialize(selectiveEvaluator, genomeFactory, genomeList); // Finished. Return the evolution algorithm return(ea); }
/// <summary> /// Initialize the experiment with some optional XML configutation data. /// </summary> public void Initialize(string name, XmlElement xmlConfig) { _name = name; _populationSize = XmlUtils.GetValueAsInt(xmlConfig, "PopulationSize"); _specieCount = XmlUtils.GetValueAsInt(xmlConfig, "SpecieCount"); _activationScheme = ExperimentUtils.CreateActivationScheme(xmlConfig, "Activation"); _complexityRegulationStr = XmlUtils.TryGetValueAsString(xmlConfig, "ComplexityRegulationStrategy"); _complexityThreshold = XmlUtils.TryGetValueAsInt(xmlConfig, "ComplexityThreshold"); _description = XmlUtils.TryGetValueAsString(xmlConfig, "Description"); _parallelOptions = ExperimentUtils.ReadParallelOptions(xmlConfig); _eaParams = new NeatEvolutionAlgorithmParameters(); _eaParams.SpecieCount = _specieCount; _neatGenomeParams = new NeatGenomeParameters(); _neatGenomeParams.FeedforwardOnly = _activationScheme.AcyclicNetwork; // Determne what function to regress. string fnIdStr = XmlUtils.GetValueAsString(xmlConfig, "Function"); FunctionId fnId = (FunctionId)Enum.Parse(typeof(FunctionId), fnIdStr); _func = FunctionRegressionEvaluator.GetFunction(fnId); // Read parameter sampling scheme settings. int sampleResolution = XmlUtils.GetValueAsInt(xmlConfig, "SampleResolution"); double sampleMin = XmlUtils.GetValueAsDouble(xmlConfig, "SampleMin"); double sampleMax = XmlUtils.GetValueAsDouble(xmlConfig, "SampleMax"); int paramCount = _func.InputCount; _paramSamplingInfoArr = new ParameterSamplingInfo[paramCount]; for (int i = 0; i < paramCount; i++) { _paramSamplingInfoArr[i] = new ParameterSamplingInfo(sampleMin, sampleMax, sampleResolution); } }