protected internal override int Crossover(IMutableSeq <TGene> that, IMutableSeq <TGene> other)
{
var n = Math.Min(that.Length, other.Length);
var k = Math.Min(n, _n);
var random = RandomRegistry.GetRandom();
var points = k > 0 ? Base.Subset(n, k, random) : new int[0];
MultiPointCrossover.Crossover(that, other, points);
return(2);
}
public void Crossover(string stringA, string stringB, ISeq <int> points, string expectedA, string expectedB)
{
var a = CharSeq.ToImmutableSeq(stringA);
var b = CharSeq.ToImmutableSeq(stringB);
var ma = a.Copy();
var mb = b.Copy();
var intPoints = points.Select(i => i).ToArray();
MultiPointCrossover.Crossover(ma, mb, intPoints);
Assert.Equal(ToString(ma), expectedA);
Assert.Equal(ToString(mb), expectedB);
}
public void CrossoverAll1()
{
var chars = CharSeq.Of("a-zA-Z");
var g1 = new CharacterChromosome(chars, 20).ToSeq();
var g2 = new CharacterChromosome(chars, 20).ToSeq();
var crossover = new MultiPointCrossover <CharacterGene, double>(2000);
var points = new int[g1.Length];
for (var i = 0; i < points.Length; ++i)
{
points[i] = i;
}
var ms1 = g1.Copy();
var ms2 = g2.Copy();
crossover.Crossover(ms1, ms2);
}
public void SinglePointCrossoverConsistency()
{
var a = CharSeq.ToImmutableSeq("1234567890");
var b = CharSeq.ToImmutableSeq("ABCDEFGHIJ");
for (var i = 0; i < a.Length + 1; ++i)
{
var ma1 = a.Copy();
var mb1 = b.Copy();
var ma2 = a.Copy();
var mb2 = b.Copy();
MultiPointCrossover.Crossover(ma1, mb1, new[] { i });
SinglePointCrossover.Crossover(ma2, mb2, i);
Assert.Equal(ma1, ma2);
Assert.Equal(mb1, mb2);
}
}
public void ReverseCrossover(int npoints)
{
for (var i = 1; i < 500; ++i)
{
var chars = CharSeq.Of("a-zA-Z");
var a = new CharacterChromosome(chars, i).ToSeq().Select(g => g.Allele).ToImmutableSeq();
var b = new CharacterChromosome(chars, i).ToSeq().Select(g => g.Allele).ToImmutableSeq();
var ma1 = a.Copy();
var mb1 = b.Copy();
var points = Base.Subset(
a.Length + 1,
Math.Min(npoints, a.Length + 1),
new Random(1234)
);
MultiPointCrossover.Crossover(ma1, mb1, points);
MultiPointCrossover.Crossover(ma1, mb1, points);
Assert.Equal(a, ma1);
Assert.Equal(b, mb1);
}
}
