smile.math.distance

Interface Distance<T>

All Known Subinterfaces:

Metric<T>

All Known Implementing Classes:

ChebyshevDistance, CorrelationDistance, DynamicTimeWarping, EditDistance, EuclideanDistance, HammingDistance, JaccardDistance, JensenShannonDistance, LeeDistance, MahalanobisDistance, ManhattanDistance, MinkowskiDistance, SparseChebyshevDistance, SparseEuclideanDistance, SparseManhattanDistance, SparseMinkowskiDistance

public interface Distance<T>

An interface to calculate a distance measure between two objects. A distance function maps pairs of points into the nonnegative reals and has to satisfy

• non-negativity: d(x, y) ≥ 0
• isolation: d(x, y) = 0 if and only if x = y
• symmetry: d(x, y) = d(x, y)

. Note that a distance function is not required to satisfy triangular inequality |x - y| + |y - z| ≥ |x - z|, which is necessary for a metric.

Author:

Haifeng Li

Method Summary

Methods

Modifier and Type	Method and Description
double	d(T x, T y) Returns the distance measure between two objects.

Method Detail

d

double d(T x,
       T y)

Returns the distance measure between two objects.