public async Task <Genome> Epoch(IEnumerable <Local> locals)
{
if (new Delegate[] { Fitness, Mutation, Crossover, Selection, }.Any(e => e == null))
{
throw new Exception("GA cant run without all operators");
}
var config = new GASettings();
var crossOverRate = config.CrossoverRate;
var mutationRate = config.MutationRate;
locals = EnumerableEx.Return(locals.First()).Concat(locals.Skip(1).Shuffle());
var population = await Enumerable.Range(0, settings.PopulationSize)
.Select(_ => new Genome(locals))
.ToObservable()
.Select(n => Observable.FromAsync(_ => n.CalcRoutesAsync(routeService.CalcFullRoute)))
.Merge(ParallelQuantity)
.Select(e => e.CalcFitness(Fitness))
.ToList();
var lastGen = await
GetNewPopulationCollectionAsync(population, crossOverRate, mutationRate)
.ToObservable()
.SelectMany(n => Observable.FromAsync(_ => n))
.Take(settings.GenerationLimit)
.LastAsync()
;
return(lastGen.OrderBy(e => e.Fitness).First());
}
public GeneticAlgorithmFinder(
FitnessDelegate fitnessDelegate,
MutationDelegate mutationDelegate,
CrossOverDelegate crossOverDelegate,
SelectionDelegate selectionDelegate,
IRouteService routeService,
GASettings gASettings
)
{
Fitness = fitnessDelegate;
Mutation = mutationDelegate;
Crossover = crossOverDelegate;
Selection = selectionDelegate;
settings = gASettings;
this.routeService = routeService;
}