public Antecedent?CreateAntecedent(int seedIndex, ReadOnlySpan <int> nearestInstancesIndices)
{
var builder = HyperRectangleBuilder.InitializeWithSeed(
dataset: _dataset,
seedIndex: seedIndex);
for (int i = 0; i < nearestInstancesIndices.Length; i++)
{
var index = nearestInstancesIndices[i];
EnlargeToCoverInstance(
builder: builder,
instanceIndex: index);
}
var box = builder.TryBuild();
if (box is null)
{
return(null);
}
var featureTests = _converter.FromHyperRectangle(box);
return(new Antecedent(featureTests));
}
public HyperRectangle?TryCreateLargestNonIntersectingRectangle(int seedIndex, Array <HyperRectangle> existingHyperRectangles, NaturalRange dimensionExpansionOrder)
{
if (dimensionExpansionOrder.Length != Dataset.FeatureCount)
{
throw new InvalidOperationException();
}
if (existingHyperRectangles.IsEmpty)
{
var tempBuilder = HyperRectangleBuilder.InitializeWithLargestRectangle(Dataset);
var hyperRectangle = tempBuilder.TryBuild();
if (hyperRectangle is null)
{
throw new InvalidOperationException();
}
else
{
return(hyperRectangle);
}
}
var builder = HyperRectangleBuilder.InitializeWithSeed(
dataset: Dataset,
seedIndex: seedIndex);
var seed = Dataset.GetInstanceData(seedIndex);
for (int i = 0; i < dimensionExpansionOrder.Length; i++)
{
var dimensionIndex = dimensionExpansionOrder[i];
switch (Dataset.GetFeatureType(dimensionIndex))
{
case FeatureType.Continuous:
UpdateContinuousDimension(
builder: builder,
existingHyperRectangles: existingHyperRectangles,
dimensionIndex: dimensionIndex,
seed: seed);
break;
default:
throw CommonExceptions.UnknownFeatureType;
}
}
var largestHyperRectangle = builder.TryBuild();
return(largestHyperRectangle);
}