/// <summary>
/// Parameterized Constructor
/// </summary>
/// <param name="chromosome"></param>
public SimpleStockTraderChromosome(SimpleStockTraderChromosome chromosome)
{
_ranges = (Range[])chromosome.Ranges.Clone();
_length = _ranges.Length;
_values = (double[])chromosome.Values.Clone();
InitializeGenerators();
}
/// <summary>
/// Equal override method
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public override bool Equals(object obj)
{
if (obj is SimpleStockTraderChromosome)
{
SimpleStockTraderChromosome chromosome = obj as SimpleStockTraderChromosome;
if (chromosome.fitness != fitness)
{
return(false);
}
for (int i = 0; i < _length; i++)
{
if (_values[i] != chromosome.Values[i])
{
return(false);
}
}
return(true);
}
return(false);
}
/// <summary>
/// Perform two point crossover between seletected pair
/// </summary>
/// <param name="pair"></param>
public override void Crossover(IChromosome pair)
{
//If length is less than 3 two point crossover cannot be performed.
if (_length < 3)
{
int xoverpoint = (int)Math.Ceiling(_random.NextDouble() * (_length - 1));
SinglePointCrossover(pair, xoverpoint);
return;
}
SimpleStockTraderChromosome chromosome = (SimpleStockTraderChromosome)pair;
int left = _random.Next(_length - 1);
int right = _random.Next(_length - 1);
while (left == right)
{
right = _random.Next(_length - 1);
}
if (left > right)
{
double[] temp = new double[_length];
// copy part of first (this) chromosome to temp
Array.Copy(_values, temp, _length);
// copy part of second (pair) chromosome to the first
Array.Copy(chromosome.Values, right, _values, right, left - right);
// copy temp to the second
Array.Copy(temp, right, chromosome.Values, right, left - right);
}
else
{
double[] temp = new double[_length];
// copy part of first (this) chromosome to temp
Array.Copy(_values, temp, _length);
// copy part of second (pair) chromosome to the first
Array.Copy(chromosome.Values, left, _values, left, right - left);
// copy temp to the second
Array.Copy(temp, left, chromosome.Values, left, right - left);
}
}
/// <summary>
/// Single point crossover
/// </summary>
public void SinglePointCrossover(IChromosome pair, int xoverpoint)
{
SimpleStockTraderChromosome chromosome = (SimpleStockTraderChromosome)pair;
Array.Copy(chromosome.Values, xoverpoint, _values, xoverpoint, _length - xoverpoint);
}