/// <summary> /// Initializes a new instance of the <see cref="GEPChromosome"/> class. /// </summary> /// /// <param name="source">Source GEP chromosome to clone from.</param> /// protected GEPChromosome(GEPChromosome source) { headLength = source.headLength; length = source.length; fitness = source.fitness; // allocate genes array genes = new IGPGene[length]; // copy genes for (int i = 0; i < length; i++) { genes[i] = source.genes[i].Clone(); } }
/// <summary> /// One-point recombination (crossover). /// </summary> /// /// <param name="pair">Pair chromosome to crossover with.</param> /// public void RecombinationOnePoint(GEPChromosome pair) { // check for correct pair if ((pair.length == length)) { // crossover point int crossOverPoint = rand.Next(length - 1) + 1; // length of chromosome to be crossed int crossOverLength = length - crossOverPoint; // swap parts of chromosomes Recombine(genes, pair.genes, crossOverPoint, crossOverLength); } }
/// <summary> /// Crossover operator. /// </summary> /// /// <param name="pair">Pair chromosome to crossover with.</param> /// /// <remarks><para>The method performs one-point or two-point crossover selecting /// them randomly with equal probability.</para></remarks> /// public override void Crossover(IChromosome pair) { GEPChromosome p = (GEPChromosome)pair; // check for correct chromosome if (p != null) { // choose recombination method if (rand.Next(2) == 0) { RecombinationOnePoint(p); } else { RecombinationTwoPoint(p); } } }
/// <summary> /// Two point recombination (crossover). /// </summary> /// /// <param name="pair">Pair chromosome to crossover with.</param> /// public void RecombinationTwoPoint(GEPChromosome pair) { // check for correct pair if ((pair.length == length)) { // crossover point int crossOverPoint = rand.Next(length - 1) + 1; // length of chromosome to be crossed int crossOverLength = length - crossOverPoint; // if crossover length already equals to 1, then it becomes // usual one point crossover. otherwise crossover length // also randomly chosen if (crossOverLength != 1) { crossOverLength = rand.Next(crossOverLength - 1) + 1; } // swap parts of chromosomes Recombine(genes, pair.genes, crossOverPoint, crossOverLength); } }
/// <summary> /// Initializes a new instance of the <see cref="GEPChromosome"/> class. /// </summary> /// /// <param name="source">Source GEP chromosome to clone from.</param> /// protected GEPChromosome(GEPChromosome source) { headLength = source.headLength; length = source.length; fitness = source.fitness; // allocate genes array genes = new IGPGene[length]; // copy genes for (int i = 0; i < length; i++) genes[i] = source.genes[i].Clone(); }
/// <summary> /// Two point recombination (crossover). /// </summary> /// /// <param name="pair">Pair chromosome to crossover with.</param> /// public void RecombinationTwoPoint(GEPChromosome pair) { var rand = Generator.Random; // check for correct pair if ((pair.length == length)) { // crossover point int crossOverPoint = rand.Next(length - 1) + 1; // length of chromosome to be crossed int crossOverLength = length - crossOverPoint; // if crossover length already equals to 1, then it becomes // usual one point crossover. otherwise crossover length // also randomly chosen if (crossOverLength != 1) { crossOverLength = rand.Next(crossOverLength - 1) + 1; } // swap parts of chromosomes Recombine(genes, pair.genes, crossOverPoint, crossOverLength); } }
/// <summary> /// One-point recombination (crossover). /// </summary> /// /// <param name="pair">Pair chromosome to crossover with.</param> /// public void RecombinationOnePoint(GEPChromosome pair) { var rand = Generator.Random; // check for correct pair if ((pair.length == length)) { // crossover point int crossOverPoint = rand.Next(length - 1) + 1; // length of chromosome to be crossed int crossOverLength = length - crossOverPoint; // swap parts of chromosomes Recombine(genes, pair.genes, crossOverPoint, crossOverLength); } }