Package com.github.jelmerk.knn

Class DoubleDistanceFunctions

java.lang.Object

com.github.jelmerk.knn.DoubleDistanceFunctions

public final class DoubleDistanceFunctions
extends Object

Various distance metrics.

Method Summary

Modifier and Type	Method	Description
static double	cosineDistance(double[] u, double[] v)	Calculates cosine distance on a float array.
static double	innerProduct(double[] u, double[] v)	Calculates inner product.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

cosineDistance

public static double cosineDistance(double[] u,
                                    double[] v)

Calculates cosine distance on a float array.

Parameters:

u - Left vector.

v - Right vector.

Returns:

Cosine distance between u and v.

innerProduct

public static double innerProduct(double[] u,
                                  double[] v)

Calculates inner product.

Parameters:

u - Left vector.

v - Right vector.

Returns:

Cosine distance between u and v.