private static IWeightMutationStrategy <double> CreateCardinalUniformResetStrategy(
int selectCount, double weightScale)
{
var selectStrategy = new CardinalSubsetSelectionStrategy(selectCount);
return(ResetWeightMutationStrategy <double> .CreateUniformResetStrategy(selectStrategy, weightScale));
}
private static IWeightMutationStrategy <double> CreateCardinalGaussianDeltaStrategy(
int selectCount, double stdDev)
{
var selectStrategy = new CardinalSubsetSelectionStrategy(selectCount);
return(DeltaWeightMutationStrategy.CreateGaussianDeltaStrategy(selectStrategy, stdDev));
}
private static IWeightMutationStrategy <double> CreateCardinalUniformResetStrategy(
int selectCount, double weightScale, IRandomSourceBuilder rngBuilder)
{
var selectStrategy = new CardinalSubsetSelectionStrategy(selectCount, rngBuilder.Create());
return(ResetWeightMutationStrategy <double> .CreateUniformResetStrategy(selectStrategy, weightScale, rngBuilder.Create()));
}
private static IWeightMutationStrategy <double> CreateCardinalGaussianDeltaStrategy(
int selectCount, double stdDev, IRandomSourceBuilder rngBuilder)
{
var selectStrategy = new CardinalSubsetSelectionStrategy(selectCount, rngBuilder.Create());
return(DeltaWeightMutationStrategy.CreateGaussianDeltaStrategy(selectStrategy, stdDev, rngBuilder.Create()));
}
public void TestCardinality()
{
var strategy = new CardinalSubsetSelectionStrategy(30, RandomDefaults.CreateRandomSource());
for (int i = 0; i < 101; i++)
{
int[] idxArr = strategy.SelectSubset(i);
int expectedCardinality = Math.Min(30, i);
Assert.AreEqual(expectedCardinality, idxArr.Length);
}
}
public void TestUniqueness()
{
var strategy = new CardinalSubsetSelectionStrategy(30, RandomDefaults.CreateRandomSource());
for (int i = 0; i < 20; i++)
{
int[] idxArr = strategy.SelectSubset(20);
HashSet <int> idxSet = new HashSet <int>();
for (int j = 0; j < idxArr.Length; j++)
{
int val = idxArr[j];
Assert.IsFalse(idxSet.Contains(val));
idxSet.Add(val);
}
}
}
public void SelectSubset_Uniqueness()
{
IRandomSource rng = RandomDefaults.CreateRandomSource();
var strategy = new CardinalSubsetSelectionStrategy(30);
for (int i = 0; i < 20; i++)
{
int[] idxArr = strategy.SelectSubset(20, rng);
HashSet <int> idxSet = new();
for (int j = 0; j < idxArr.Length; j++)
{
int val = idxArr[j];
Assert.DoesNotContain(val, idxSet);
idxSet.Add(val);
}
}
}
