public void RanksHighestScoreFirst()
{
// create individuals
var individuals = new List <Individual>();
individuals.Add(new SimpleIndividual(3));
individuals.Add(new SimpleIndividual(1));
individuals.Add(new SimpleIndividual(4));
individuals.Add(new SimpleIndividual(1));
individuals.Add(new SimpleIndividual(5));
individuals.Add(new SimpleIndividual(9));
// rank
var ranking = new CrowdingDistanceRanking(1);
ranking.Rank(individuals);
// assert highest score comes first
Assert.AreEqual(9, individuals[0].GetScore(0), delta);
Assert.AreEqual(5, individuals[1].GetScore(0), delta);
Assert.AreEqual(4, individuals[2].GetScore(0), delta);
Assert.AreEqual(3, individuals[3].GetScore(0), delta);
Assert.AreEqual(1, individuals[4].GetScore(0), delta);
Assert.AreEqual(1, individuals[5].GetScore(0), delta);
}
public void FindsSimpleSolution()
{
var random = new SystemRandom(42);
var factory = new SimpleGenomeFactory(random);
var selection = new BinaryTournamentSelection(random);
Environment environment = new SimpleEnvironment();
Ranking ranking = new CrowdingDistanceRanking(1);
var evolution = new Evolution(100, 0.4, 0.4, factory, selection);
var genomes = evolution.Initialize();
double score = 0;
for (int i = 0; i < 100; i++)
{
// evaluate
var population = genomes.Select(environment.Evaluate).ToList();
// rank
ranking.Rank(population);
// keep score
var best = population[0];
Console.WriteLine(best);
score = best.GetScore(0);
// evolve
genomes = evolution.Evolve(population, random);
}
Assert.Greater(score, 30);
}
public void RanksByDomination()
{
// create individuals
var individuals = new List <Individual>();
individuals.Add(new ParetoIndividual(3, 6, 0)); // rank 1
individuals.Add(new ParetoIndividual(1, 5, 0)); // rank 2
individuals.Add(new ParetoIndividual(4, 4, 0)); // rank 1
individuals.Add(new ParetoIndividual(1, 3, 0)); // rank 3
individuals.Add(new ParetoIndividual(5, 2, 0)); // rank 1
individuals.Add(new ParetoIndividual(9, 1, 0)); // rank 1
// rank
var ranking = new CrowdingDistanceRanking(3);
ranking.Rank(individuals);
// assert highest score comes first
Assert.AreEqual(6, individuals[0].GetScore(1), delta); // rank 1 extreme
Assert.AreEqual(1, individuals[1].GetScore(1), delta); // rank 1 extreme
Assert.AreEqual(2, individuals[2].GetScore(1), delta); // rank 1 middle
Assert.AreEqual(4, individuals[3].GetScore(1), delta); // rank 1 crowded
Assert.AreEqual(5, individuals[4].GetScore(1), delta); // rank 2
Assert.AreEqual(3, individuals[5].GetScore(1), delta); // rank 3
}
public void FindsSimpleSolution()
{
var random = new SystemRandom(42);
var factory = new SimpleGenomeFactory(random);
var selection = new BinaryTournamentSelection(random);
Environment environment = new SimpleEnvironment();
Ranking ranking = new CrowdingDistanceRanking(1);
var writer = File.CreateText("stats.csv");
var evolution = new ElitistEvolution(100, 20, factory, environment, 1, writer);
var genomes = evolution.Initialize();
double score = 0;
for (int i = 0; i < 100; i++)
{
genomes = evolution.Evolve(genomes, random);
}
writer.Close();
Assert.Greater(score, 30);
}
