private static void Mutate(List <INode> genes, IReadOnlyList <FnCreateGeneDelegate> geneSet, int minGenes, int maxGenes,
FnGetFitnessDelegate fnGetFitness, int maxRounds)
{
var count = Rand.Random.Next(1, maxRounds + 1);
var initialFitness = fnGetFitness(genes);
while (count-- > 0)
{
if (fnGetFitness(genes).CompareTo(initialFitness) > 0)
{
return;
}
var adding = genes.Count == 0 || genes.Count < maxGenes - 1 && Rand.PercentChance(20);
if (adding)
{
var gene1 = Rand.SelectItem(geneSet)();
genes.Add(gene1);
continue;
}
var removing = genes.Count > minGenes && Rand.PercentChance(2);
if (removing)
{
var index1 = Rand.Random.Next(genes.Count);
genes.RemoveAt(index1);
continue;
}
// Replace gene
var gene = Rand.SelectItem(geneSet)();
var index = Rand.Random.Next(genes.Count);
genes[index] = gene;
}
}
private static void Mutate(List <Node> childGenes, CreateGeneDelegate fnCreateGene,
FnGetFitnessDelegate fnGetFitness, int sourceCount)
{
if (childGenes.Count <= sourceCount)
{
throw new Exception("Not enough genes.");
}
var initialFitness = fnGetFitness(childGenes);
var count = Rand.Random.Next(1, 6);
while (count-- > 0)
{
//var gatesUsed = NodesToCircuit(childGenes).Item2.Where(s => s >= sourceCount).ToArray();
//if (!gatesUsed.Any())
// return;
//var index = Rand.SelectItem(gatesUsed);
var index = Rand.Random.Next(childGenes.Count - sourceCount) + sourceCount;
childGenes[index] = fnCreateGene(index);
if (fnGetFitness(childGenes).CompareTo(initialFitness) > 0)
{
return;
}
}
}
private static void Mutate(List <Rule> genes, FnGetFitnessDelegate fnGetFitness,
IReadOnlyList <FnMutateDelegate> mutationOperators, List <int> mutationRoundCounts)
{
var initialFitness = fnGetFitness(genes);
var count = Rand.SelectItem(mutationRoundCounts);
for (var i = 1; i < count + 2; i++)
{
foreach (var mutate in mutationOperators.OrderBy(o => Rand.Random.Next()))
{
var mutated = mutate(genes);
if (mutated)
{
break;
}
}
if (fnGetFitness(genes).CompareTo(initialFitness) <= 0)
{
continue;
}
mutationRoundCounts.Add(i);
break;
}
// Is it worth it to remove duplicate genes?
//var seen = new HashSet<string>();
//genes.RemoveAll(x => !seen.Add(x.ToString()));
}
private static void Mutate(List <string> genes, FnGetFitnessDelegate fnGetFitness,
IReadOnlyCollection <FnMutateDelegate> mutationOperators, List <int> mutationRoundCounts)
{
var initialFitness = fnGetFitness(genes);
var count = Rand.SelectItem(mutationRoundCounts);
for (var i = 1; i < count + 3; i++)
{
var copy = mutationOperators.ToList();
var func = Rand.SelectItem(copy);
while (!func(genes))
{
copy.Remove(func);
func = Rand.SelectItem(copy);
}
if (fnGetFitness(genes).CompareTo(initialFitness) <= 0)
{
continue;
}
mutationRoundCounts.Add(i);
break;
}
}
