private void EnlargeContinuousInterval(HyperRectangleBuilder builder, Array <float> instance, int dimensionIndex)
{
var(Start, End) = builder.GetContinuousDimensionPreview(dimensionIndex);
var target = instance[dimensionIndex];
if (target < Start)
{
builder.UpdateContinuousDimensionIntervalStart(
dimensionIndex: dimensionIndex,
value: target);
return;
}
if (target >= End)
{
var possibleValues = _dataset.GetSortedUniqueFeatureValues(featureIndex: dimensionIndex);
var indexOfStart = possibleValues.BinarySearch(target);
if (indexOfStart == possibleValues.Length - 1)
{
builder.UpdateContinuousDimensionIntervalEnd(
dimensionIndex: dimensionIndex,
value: float.PositiveInfinity);
}
else
{
var nextLarger = possibleValues[indexOfStart + 1];
builder.UpdateContinuousDimensionIntervalEnd(
dimensionIndex: dimensionIndex,
value: nextLarger);
}
}
}
private void UpdateContinuousDimension(HyperRectangleBuilder builder, Array <HyperRectangle> existingHyperRectangles, int dimensionIndex, Array <float> seed)
{
var min = float.NegativeInfinity;
var max = float.PositiveInfinity;
for (int i = 0; i < existingHyperRectangles.Length; i++)
{
var currentRectangle = existingHyperRectangles[i];
var intersects = _intersector.IntersectsInAllButOneDimension(
builder: builder,
rect: currentRectangle,
dimensionToSkip: dimensionIndex);
if (!intersects)
{
continue;
}
var dimension = (ContinuousInterval)currentRectangle.GetDimensionInterval(dimensionIndex);
var otherEnd = dimension.End;
var otherStart = dimension.Start;
var seedValue = seed[dimensionIndex];
if (seedValue >= otherEnd)
{
min = Math.Max(min, otherEnd);
}
else
{
max = Math.Min(max, otherStart);
}
}
builder.UpdateContinuousDimensionIntervalStart(dimensionIndex: dimensionIndex, value: min);
builder.UpdateContinuousDimensionIntervalEnd(dimensionIndex: dimensionIndex, value: max);
}