private DoubleIndividual rndValues() {
DoubleIndividual ind;
double[] values = new double[numVariables];
for (int i = 0; i < values.length; i++) {
values[i] = StdRandom.uniform(constraintMin, constraintMax);
}
ind = new DoubleIndividual(values);
return ind;
}
public Individual[] run(
StopCondition cond,
FitnessFunction fitness,
SelectionAlgorithm[] selector,
GenerationAlgorithm generator,
ReplaceAlgorithm replacer,
int lambda) {
int t = 0;
double prob[] = new double[selector.length];
for (int i = 0; i < prob.length; i++) {
prob[i] = 1 / prob.length;
}
Individual parents[] = fitness.initialize(lambda);
double mini = minimize ? Double.MAX_VALUE : Double.MIN_VALUE;
double better = minimize ? Double.MAX_VALUE : Double.MIN_VALUE;
for (int i = 0; i < parents.length; i++) {
double fit = fitness.fitness(parents[i]);
if (minimize) {
if (better > fit) {
better = fit;
}
} else {
if (better < fit) {
better = fit;
}
}
}
double previous = better;
boolean first = true;
boolean second = true;
ArrayList<Double> values = new ArrayList<Double>();
ArrayList<Double> minis = new ArrayList<Double>();
ArrayList<Double> maxis = new ArrayList<Double>();
ArrayList<Double> promis = new ArrayList<Double>();
ArrayList<Double> desvis = new ArrayList<Double>();
while (!cond.stop(parents, fitness, t)) {
for (int l = 0; l < lambda; l += 2) {
Individual[] marriage = new Individual[2];
marriage[0] = parents[StdRandom.uniform(lambda)];
marriage[1] = parents[StdRandom.uniform(lambda)];
marriage = generator.generate(marriage, fitness, minimize);
parents[l] = marriage[0];
if (l + 1 < lambda) {
parents[l + 1] = marriage[1];
}
}
double rnd = StdRandom.uniform(0.0, 1.0);
double sum = 0.0;
SelectionAlgorithm sel = selector[selector.length - 1];
int index = selector.length - 1;
for (int i = 0; i < prob.length; i++) {
if ((sum += prob[i]) >= rnd) {
sel = selector[i];
index = i;
break;
}
}
parents = sel.selection(parents, fitness, minimize);
double prom = 0.0;
better = minimize ? Double.MAX_VALUE : Double.MIN_VALUE;
for (int i = 0; i < parents.length; i++) {
double fit = fitness.fitness(parents[i]);
values.add(fit);
prom += fit;
if (minimize) {
if (better > fit) {
better = fit;
}
} else {
if (better < fit) {
better = fit;
}
}
}
prom /= parents.length;
if (prom != mini) {
prob[index] +=
minimize && prom < mini
? (1 - prob[index]) / prob.length
: (-1 * prob[index]) / prob.length;
for (int i = 0; i < prob.length; i++) {
if (i != index) {
prob[i] +=
minimize && prom < mini
? -1 * (1 - prob[index]) / (prob.length * (prob.length - 1))
: (prob[index]) / (prob.length * (prob.length - 1));
}
}
mini = minimize && prom < mini ? prom : mini;
mini = !minimize && prom > mini ? prom : mini;
}
if (Math.abs(previous - better) < StdRandom.uniform(0.0, 1)) {
for (int i = 0; i < parents.length; i++) {
double par[] = parents[i].getParameters();
par[Individual.DELTA] += StdRandom.uniform(0.5, fitness.getConstraintMax() * 2);
parents[i].setParameters(par);
}
} else if (Math.abs(previous - better) > StdRandom.uniform(100, 10000)) {
for (int i = 0; i < parents.length; i++) {
double par[] = parents[i].getParameters();
if (par[Individual.DELTA] > 0) {
par[Individual.DELTA] -= StdRandom.uniform(0, par[Individual.DELTA] / 2);
}
parents[i].setParameters(par);
}
}
previous = better;
t++;
if (fitness.callsNumber() >= 120000 && first) {
first = false;
Statistics.run(values, fitness, minimize);
}
if (fitness.callsNumber() >= 600000 && second) {
second = false;
Statistics.run(values, fitness, minimize);
}
double min = Double.MAX_VALUE;
double max = Double.MIN_VALUE;
double desEst = 0;
double prome = 0;
for (int i = 0; i < parents.length; i++) {
double fit = fitness.fitness(parents[i]);
values.add(fit);
if (fit < min) {
min = fit;
}
if (fit > max) {
max = fit;
}
prome += fit;
}
prome /= parents.length;
for (int i = 0; i < parents.length; i++) {
double fit = fitness.fitness(parents[i]);
desEst = (fit - prome) * (fit - prome);
}
desEst /= parents.length - 1;
minis.add(min);
maxis.add(max);
promis.add(prome);
desvis.add(desEst);
System.out.println(min);
}
Statistics.run(values, fitness, minimize);
System.out.println("ITER;MIN;MAX;PROM;D.EST");
for (int i = 0; i < minis.size(); i++) {
System.out.print((i + 1) + ";");
System.out.print(minis.get(i) + ";");
System.out.print(maxis.get(i) + ";");
System.out.print(promis.get(i) + ";");
System.out.println(desvis.get(i));
}
return parents;
}