public BinaryChromosome(IBinaryProblem problem) : base(problem)
{
// Initialize randomly
for (int i = 0; i < Dimension; i++)
{
BitArray gene = BitArrayHelper.CreateRandom(problem.GetNumberOfBits(i));
SetValue(i, gene);
}
}
public IList <BinaryChromosome> Execute(IList <BinaryChromosome> parents)
{
if (parents == null)
{
throw new ArgumentNullException(nameof(parents));
}
if (parents.Count != NumberOfParents)
{
throw new ArgumentException($"There must be {NumberOfParents} parents instead of {parents.Count}");
}
BinaryChromosome parent1 = (BinaryChromosome)parents[0].Copy();
BinaryChromosome parent2 = (BinaryChromosome)parents[1].Copy();
IList <BinaryChromosome> result = new List <BinaryChromosome>();
if (_random.NextDouble() > _crossoverProbability)
{
result.Add(parent1);
result.Add(parent2);
return(result);
}
IBinaryProblem problem = (IBinaryProblem)parent1.Problem;
BinaryChromosome child = (BinaryChromosome)parent1.Copy();
for (int i = 0; i < problem.Dimension; i++)
{
int numberOfBits = problem.GetNumberOfBits(i);
BitArray parent1Value = parent1.GetValue(i);
BitArray parent2Value = parent2.GetValue(i);
BitArray randomValue = BitArrayHelper.CreateRandom(numberOfBits);
BitArray childValue = new BitArray(numberOfBits);
for (int j = 0; j < numberOfBits; j++)
{
bool a = parent1Value[j];
bool b = parent2Value[j];
bool r = randomValue[j];
childValue[j] = (a & b) | (r & (a ^ b));
}
child.SetValue(i, childValue);
}
result.Add(child);
return(result);
}