public void saveState(PopulationInterface Pop) {
oldFit = Pop.getBestFitness().clone();
oldNorm = PhenotypeMetric.norm(oldFit);
popFitCalls = Pop.getFunctionCalls();
popGens = Pop.getGeneration();
firstTime = false;
}
private boolean stagnationTimeHasPassed(PopulationInterface pop) {
if (stagnationMeasure.isSelectedString("Fitness calls")) { // by fitness calls
// System.out.println("stagnationTimeHasPassed returns " + ((pop.getFunctionCalls() -
// popFitCalls) >= m_stagTime) + " after " + (pop.getFunctionCalls() - popFitCalls));
return (pop.getFunctionCalls() - popFitCalls) >= m_stagTime;
} else { // by generation
// System.out.println("stagnationTimeHasPassed returns " + ((pop.getFunctionCalls() -
// popGens) >= m_stagTime) + " after " + (pop.getFunctionCalls() - popGens));
return (pop.getGeneration() - popGens) >= m_stagTime;
}
}
/**
* Return true if |oldFit - curFit| < |oldFit| * thresh (relative case) and if |oldFit - curFit| <
* thresh (absolute case).
*
* @param
* @return
*/
protected boolean isStillConverged(PopulationInterface pop) {
double[] curFit = pop.getBestFitness();
double dist = EuclideanMetric.euclideanDistance(oldFit, curFit);
boolean ret;
if (convergenceCondition.isSelectedString("Relative")) {
ret = (dist < (oldNorm * convThresh));
} else {
ret = (dist < convThresh);
}
return ret;
}
