// initialize objects
private void initDataObjects() {
objects = new ArrayList<DataObject>();
for (int i = 0; i < n; i++) {
DataObject obj = new DataObject();
int year = (int) (Math.random() * MAX_YEAR);
double ratio1 = Math.random() % MAX_RATIO;
double ratio2 = Math.random() % MAX_RATIO;
obj.setYear(year);
obj.setRatio1(ratio1);
obj.setRatio2(ratio2);
objects.add(obj);
}
System.out.println("Data Size:" + objects.size());
}
private CenterObject getMutant(CenterObject center, float f) {
CenterObject mutant = new CenterObject();
int a = (int) (Math.random() * n);
int b = (int) (Math.random() * n);
int c = (int) (Math.random() * n);
// System.out.println("a b c:" + a + " " + b + " " + c);
DataObject objA = objects.get(a);
DataObject objB = objects.get(b);
DataObject objC = objects.get(c);
DataObject obj;
for (int i = 0; i < k; i++) {
int year = (int) (objA.getYear() + f * (objB.getYear() - objC.getYear()));
double ratio1 = objA.getRatio1() + f * (objB.getRatio1() - objC.getRatio1());
double ratio2 = objA.getRatio2() + f * (objB.getRatio2() - objC.getRatio2());
obj = new DataObject();
obj.setYear(year);
obj.setRatio1(ratio1);
obj.setRatio2(ratio2);
mutant.getObjs().add(obj);
System.out.println("Mutant " + i);
printCenter(mutant);
}
return mutant;
}
private float getFitness(CenterObject center) {
float fitness = 0.0F;
for (DataObject c : center.getObjs()) {
for (DataObject obj : objects) {
fitness +=
(obj.getYear() - c.getYear()) * (obj.getYear() - c.getYear())
+ (obj.getRatio1() - c.getRatio1()) * (obj.getRatio1() - c.getRatio1())
+ (obj.getRatio2() - c.getRatio2()) * (obj.getRatio2() - c.getRatio2());
}
}
System.out.println("Fitness:" + fitness);
return fitness;
}