public IVector CalculateDistance(IVector vector, DistanceMetric distanceMetric)
{
if (_curr == null)
{
_curr = _centroid.Select(c => c.Current).ToArray();
}
if (distanceMetric == DistanceMetric.Cosine)
{
return(vector.CosineDistance(_curr, ref _clusterNorm));
}
else
{
return(vector.FindDistances(_curr, distanceMetric));
}
}
/// <summary>
/// Calculates the distance between two vectors
/// </summary>
/// <param name="distance"></param>
/// <param name="vector1"></param>
/// <param name="vector2"></param>
public static float Calculate(this DistanceMetric distance, IVector vector1, IVector vector2)
{
switch (distance)
{
case DistanceMetric.Cosine:
return(vector1.CosineDistance(vector2));
case DistanceMetric.Euclidean:
return(vector1.EuclideanDistance(vector2));
case DistanceMetric.Manhattan:
return(vector1.ManhattanDistance(vector2));
case DistanceMetric.SquaredEuclidean:
return(vector1.SquaredEuclidean(vector2));
default:
return(vector1.MeanSquaredDistance(vector2));
}
}
