private double calDeathRate(World x) {
try {
World y = listCells.getLast();
double pX = x.getPopulation(), pY = y.getPopulation();
return (pX - pY) / pX;
} catch (NoSuchElementException e) {
return -100000;
}
}
public void addState(World x) {
double growthRate = calGrowthRate(x), deathRate = calDeathRate(x);
int population = x.getPopulation();
listPopulationChange.add(generation == 0 ? population : population - listPopulation.getLast());
listPopulation.add(population);
listGrowthRate.add(growthRate);
listDeathRate.add(deathRate);
if (generation == 1) {
minPopulation = maxPopulation = population;
maxGrowthRate = minGrowthRate = growthRate;
maxDeathRate = deathRate;
maxPopulationChange = minPopulationChange = listPopulationChange.getLast();
}
if (generation > 1) {
minPopulation = minPopulation > population ? population : minPopulation;
maxPopulation = maxPopulation < population ? population : maxPopulation;
maxGrowthRate = maxGrowthRate < growthRate ? growthRate : maxGrowthRate;
maxDeathRate = maxDeathRate < deathRate ? deathRate : maxDeathRate;
maxPopulationChange = Math.max(maxPopulationChange, listPopulationChange.getLast());
minPopulationChange = Math.min(minPopulationChange, listPopulationChange.getLast());
maxGrowthRate = Math.max(maxGrowthRate, listGrowthRate.getLast());
minGrowthRate = Math.min(minGrowthRate, listGrowthRate.getLast());
}
generation++;
listCells.add(x);
}
