public void TestCoeffVariationTerminationCriteria()
{
double threshold = 2.5e-2;
var termination = new ShuffledComplexEvolution <TestHyperCube> .CoefficientOfVariationTerminationCondition(threshold : threshold);
IObjectiveScores[] population = createSample(converged: false);
double cv = termination.GetMaxParameterCoeffVar(population);
Assert.AreEqual(0.1104401, cv, 1e-6);
Assert.IsFalse(termination.IsBelowCvThreshold(population));
population = createSample(converged: true);
cv = termination.GetMaxParameterCoeffVar(population);
Assert.AreEqual(0.01741291, cv, 1e-6);
Assert.IsTrue(termination.IsBelowCvThreshold(population));
termination = new ShuffledComplexEvolution <TestHyperCube> .CoefficientOfVariationTerminationCondition(threshold : threshold, maxHours : 0.1);
var rng = new BasicRngFactory(0);
var evaluator = new ObjEvalTestHyperCube(new ParaboloidObjEval <TestHyperCube>(bestParam: 2));
var engine = createSce(termination, rng, evaluator);
var results = engine.Evolve();
//Console.WriteLine("Current shuffle: {0}", engine.CurrentShuffle);
Assert.IsFalse(termination.HasReachedMaxTime());
}
private static ShuffledComplexEvolution <TestHyperCube> createSce(double cvThreshold, double maxHours, double objCalcPauseSec, TestObjEval <TestHyperCube> innerObjCalc = null, int maxShuffle = 15)
{
var termination = new ShuffledComplexEvolution <TestHyperCube> .CoefficientOfVariationTerminationCondition(threshold : cvThreshold, maxHours : maxHours);
var rng = new BasicRngFactory(0);
if (innerObjCalc == null)
{
innerObjCalc = new ParaboloidObjEval <TestHyperCube>(bestParam: 2);
}
var evaluator = new ObjEvalTestHyperCube(innerObjCalc, pauseSeconds: objCalcPauseSec);
var engine = createSce(termination, rng, evaluator, maxShuffle: maxShuffle);
return(engine);
}
private static ShuffledComplexEvolution <TestHyperCube> createSce(ShuffledComplexEvolution <TestHyperCube> .CoefficientOfVariationTerminationCondition termination, BasicRngFactory rng, ObjEvalTestHyperCube evaluator, int maxShuffle = 15)
{
var engine = new ShuffledComplexEvolution <TestHyperCube>(
evaluator,
new UniformRandomSamplingFactory <TestHyperCube>(rng.CreateFactory(), new TestHyperCube(2, 0, -10, 10)),
termination,
5, 20, 10, 3, 20, maxShuffle,
rng,
new DefaultFitnessAssignment());
return(engine);
}
