@Override
public NumberStatistics.Builder<G, R> evaluate(
final Iterable<? extends Phenotype<G, R>> population,
final int generation,
final Optimize opt) {
final Builder<G, R> builder = new Builder<>();
builder.generation(generation);
builder.optimize(opt);
final MinMax<Phenotype<G, R>> minMax = new MinMax<>();
final Variance<Integer> age = new Variance<>();
final Variance<R> fitness = new Variance<>();
accumulators.<Phenotype<G, R>>accumulate(
population,
minMax,
age.map(Phenotype.Age(generation)),
fitness.map(Phenotype.<R>Fitness()));
builder.bestPhenotype(opt.best(minMax.getMax(), minMax.getMin()));
builder.worstPhenotype(opt.worst(minMax.getMax(), minMax.getMin()));
builder.fitnessMean(fitness.getMean());
builder.fitnessVariance(fitness.getVariance());
builder.samples((int) minMax.getSamples());
builder.ageMean(age.getMean());
builder.ageVariance(age.getVariance());
builder.standardError(fitness.getStandardError());
return builder;
}
/** Create a population of DoubleGenes */
public static Population<DoubleGene, Double> newDoubleGenePopulation(
final int ngenes, final int nchromosomes, final int npopulation) {
final MSeq<DoubleChromosome> chromosomes = MSeq.ofLength(nchromosomes);
for (int i = 0; i < nchromosomes; ++i) {
chromosomes.set(i, DoubleChromosome.of(0, 10, ngenes));
}
final Genotype<DoubleGene> genotype = new Genotype<>(chromosomes.toISeq());
final Population<DoubleGene, Double> population = new Population<>(npopulation);
for (int i = 0; i < npopulation; ++i) {
population.add(Phenotype.of(genotype.newInstance(), 0, FF).evaluate());
}
return population;
}
public static Population<EnumGene<Double>, Double> newPermutationDoubleGenePopulation(
final int ngenes, final int nchromosomes, final int npopulation) {
final Random random = new Random(122343);
final MSeq<Double> alleles = MSeq.ofLength(ngenes);
for (int i = 0; i < ngenes; ++i) {
alleles.set(i, random.nextDouble() * 10);
}
final ISeq<Double> ialleles = alleles.toISeq();
final MSeq<PermutationChromosome<Double>> chromosomes = MSeq.ofLength(nchromosomes);
for (int i = 0; i < nchromosomes; ++i) {
chromosomes.set(i, PermutationChromosome.of(ialleles));
}
final Genotype<EnumGene<Double>> genotype = new Genotype<>(chromosomes.toISeq());
final Population<EnumGene<Double>, Double> population = new Population<>(npopulation);
for (int i = 0; i < npopulation; ++i) {
population.add(Phenotype.of(genotype.newInstance(), 0, PFF));
}
return population;
}
public static Phenotype<DoubleGene, Double> newDoublePhenotype(final double value) {
return Phenotype.of(Genotype.of(DoubleChromosome.of(DoubleGene.of(value, 0, 10))), 0, FF)
.evaluate();
}
