public DatasetCoverage[] ComputeCoverages(Array <HyperRectangle> hyperRectangles)
{
var coverages = new DatasetCoverage[hyperRectangles.Length];
Parallel.For(0, hyperRectangles.Length, i => {
var currentRectangle = hyperRectangles[i];
var currentCoverage = ComputeCoverage(hyperRectangle: currentRectangle);
coverages[i] = currentCoverage;
});
return(coverages);
}
private static void BinaryOr(bool[] finalCoverage, DatasetCoverage ruleCoverage)
{
var lhs = finalCoverage;
var rhs = ruleCoverage.InstancesCovered;
// Improve exception description
if (lhs.Length != rhs.Length)
{
throw new ArgumentException(nameof(ruleCoverage));
}
for (int i = 0; i < lhs.Length; i++)
{
lhs[i] = lhs[i] || rhs[i];
}
}
public Array <int> FindSeedsIndices(ReadOnlySpan <Rule> existingRules)
{
if (existingRules.IsEmpty)
{
var instanceCount = _dataset.InstanceCount;
var indices = new int[instanceCount];
for (int i = 0; i < indices.Length; i++)
{
indices[i] = i;
}
return(indices);
}
var boxes = _boxCreator.FromRules(existingRules.AsSpan());
var coverages = _coverageComputer.ComputeCoverages(boxes);
var totalCoverage = DatasetCoverage.CombineCoveragesBinaryOr(coverages);
return(totalCoverage.IndicesOfUncoveredInstances);
}