private static double GetNadarayaWatsonMiddlePoint(IList <double> source, NadarayaWatsonVariant variant)
{
switch (variant)
{
case NadarayaWatsonVariant.Subsitution:
return((Averages.Central(source, 50).Value + Averages.Median(source).Value) / 2.0);
case NadarayaWatsonVariant.NoiseCoursing:
return((Averages.Maximum(source).Value - Averages.Minimum(source).Value) / 2.0);
}
return(double.NaN);
}
public static IList <double> NearestNeighbors(IList <IList <double> > orderedSet, int kNN = 8)
{
if (orderedSet == null || orderedSet.Count == 0 || kNN <= 0)
{
return(new List <double>().AsReadOnly());
}
IList <IList <double> > operative = new List <IList <double> >();
Lists.Concat(operative, Lists.Get(kNN, 1, 0.0));
Lists.Concat(operative, orderedSet);
IList <double> neighbors = new List <double>();
IList <double> currentSet;
for (int i = kNN; i < orderedSet.Count + kNN; i++)
{
currentSet = Lists.GetCopyConcatenated(operative, i - kNN, i + 1);
neighbors.Add(Averages.Median(currentSet).Value);
}
return(neighbors);
}