void SetDistanceFunction()
{
switch (_distance)
{
case NearestNeighborsDistance.cosine:
_distFunc = (VBuffer <float> v1, VBuffer <float> v2) => { return(VectorDistanceHelper.Cosine(v1, v2)); };
break;
case NearestNeighborsDistance.L1:
_distFunc = (VBuffer <float> v1, VBuffer <float> v2) => { return(VectorDistanceHelper.L1(v1, v2)); };
break;
case NearestNeighborsDistance.L2:
_distFunc = (VBuffer <float> v1, VBuffer <float> v2) => { return(VectorDistanceHelper.L2(v1, v2)); };
break;
default:
throw Contracts.Except("No associated distance for {0}", _distance);
}
}
public float DistanceTo(IPointIdFloat other)
{
return(VectorDistanceHelper.L2Norm(coordinates, other.coordinates));
}