/// <summary>
/// Mutate the specified chromosome.
/// </summary>
/// <param name="chromosome">The chromosome.</param>
/// <param name="probability">The probability to mutate each chromosome.</param>
protected override void PerformMutate(IChromosome chromosome, float probability)
{
ExceptionHelper.ThrowIfNull("chromosome", chromosome);
var genesLength = chromosome.Length;
if (m_mutableGenesIndexes == null || m_mutableGenesIndexes.Length == 0)
{
if (m_allGenesMutable)
{
m_mutableGenesIndexes = Enumerable.Range(0, genesLength).ToArray();
}
else
{
m_mutableGenesIndexes = RandomizationProvider.Current.GetInts(1, 0, genesLength);
}
}
foreach (var i in m_mutableGenesIndexes)
{
if (i >= genesLength)
{
throw new MutationException(this, "The chromosome has no gene on index {0}. The chromosome genes length is {1}.".With(i, genesLength));
}
if (RandomizationProvider.Current.GetDouble() <= probability)
{
chromosome.ReplaceGene(i, chromosome.GenerateGene(i));
}
}
}
/// <summary>
/// Mutate the specified chromosome.
/// </summary>
/// <param name="chromosome">The chromosome.</param>
/// <param name="probability">The probability to mutate each chromosome.</param>
protected override void PerformMutate(IChromosome chromosome, float probability)
{
ExceptionHelper.ThrowIfNull("chromosome", chromosome);
var genesLength = chromosome.Length;
if (m_mutableGenesIndexes == null || m_mutableGenesIndexes.Length == 0)
{
if (m_allGenesMutable)
{
m_mutableGenesIndexes = Enumerable.Range(0, genesLength).ToArray();
}
else
{
m_mutableGenesIndexes = RandomizationProvider.Current.GetInts(1, 0, genesLength);
}
}
foreach (var i in m_mutableGenesIndexes)
{
if (i >= genesLength)
{
throw new MutationException(this, "The chromosome has no gene on index {0}. The chromosome genes length is {1}.".With(i, genesLength));
}
if (RandomizationProvider.Current.GetDouble() <= probability)
{
chromosome.ReplaceGene(i, chromosome.GenerateGene(i));
}
}
}
/// <summary>
/// Mutate the specified chromosome.
/// </summary>
/// <param name="chromosome">The chromosome.</param>
/// <param name="probability">The probability to mutate each chromosome.</param>
protected override void PerformMutate(IChromosome chromosome, float probability)
{
if (RandomizationProvider.Current.GetFloat() < probability)
{
// Get random insertion size and index
int insertionSize = RandomizationProvider.Current.GetInt(MinInsertionSize, MaxInsertionSize);
int index = RandomizationProvider.Current.GetInt(0, chromosome.Length - 1);
// Generate new genes for insertion
List <Gene> newGenes = new List <Gene>();
for (int i = 0; i < insertionSize; i++)
{
newGenes.Add(chromosome.GenerateGene(index + i));
}
// Get genes from chromosome and insert generated ones
List <Gene> genes = new List <Gene>();
genes.AddRange(chromosome.GetGenes());
genes.InsertRange(index, newGenes);
// Resize chromosome and replace with new
chromosome.Resize(genes.Count);
chromosome.ReplaceGenes(0, genes.ToArray());
}
}
protected override void PerformMutate(IChromosome chromosome, float probability)
{
for (int i = 0; i < chromosome.Length; i++)
{
double rnd = RandomizationProvider.Current.GetDouble();
if (rnd <= probability)
{
int value = (int)chromosome.GetGene(i).Value;
if (rnd <= probability / 2)
{
value++;
}
else
{
value--;
}
chromosome.ReplaceGene(i, new Gene(value));
}
else if (rnd >= .8f)
{
chromosome.ReplaceGene(i, chromosome.GenerateGene(i));
}
}
}
/// <summary>
/// Mutate the specified chromosome.
/// </summary>
/// <param name="chromosome">The chromosome.</param>
/// <param name="probability">The probability to mutate each chromosome.</param>
protected override void PerformMutate(IChromosome chromosome, float probability)
{
if (RandomizationProvider.Current.GetFloat() < probability)
{
int randIndex = RandomizationProvider.Current.GetInt(0, chromosome.Length - 1);
// Create a new randon gene in place of the other
chromosome.ReplaceGene(randIndex, chromosome.GenerateGene(randIndex));
}
}
/// <summary>
/// Mutate the specified chromosome.
/// </summary>
/// <param name="chromosome">The chromosome.</param>
/// <param name="probability">The probability to mutate each chromosome.</param>
protected override void PerformMutate(IChromosome chromosome, float probability)
{
ExceptionHelper.ThrowIfNull("chromosome", chromosome);
var genesLength = chromosome.Length;
if (m_mutableGenesIndexes == null || m_mutableGenesIndexes.Length == 0)
{
if (m_allGenesMutable)
{
m_mutableGenesIndexes = Enumerable.Range(0, genesLength).ToArray();
}
else
{
m_mutableGenesIndexes = RandomizationProvider.Current.GetInts(1, 0, genesLength);
}
}
foreach (var i in m_mutableGenesIndexes)
{
if (i >= genesLength)
{
throw new MutationException(this, "The chromosome has no gene on index {0}. The chromosome genes length is {1}.".With(i, genesLength));
}
if (RandomizationProvider.Current.GetDouble() <= probability)
{
if (chromosome is ChromosomeDE && ((chromosome as ChromosomeDE).GInfo[i] is DoubleRange))
{
var gi = (chromosome as ChromosomeDE).GInfo[i] as DoubleRange;
var center = (double)chromosome.GetGene(i).Value;
var radius = Math.Abs(gi.Right - gi.Left) * Radius;
chromosome.ReplaceGene(i, new Gene(gi.GetRandValue_Uniform(center - radius, center + radius)));
continue;
}
chromosome.ReplaceGene(i, chromosome.GenerateGene(i));
}
}
}
/// <summary>
/// Selects a random gene in the solution candidate and replaces it with a random generated gene.
/// </summary>
/// <param name="chromosome">The solution candidate.</param>
private void MutateByCharacterFlip(IChromosome chromosome)
{
int randIdx = RandomizationProvider.Current.GetInt(0, chromosome.Length);
chromosome.GenerateGene(randIdx);
}
