com.cloudera.oryx.app.serving.als

Class CosineAverageFunction

java.lang.Object

com.cloudera.oryx.app.serving.als.CosineAverageFunction

All Implemented Interfaces:

CosineDistanceSensitiveFunction, ToDoubleFunction<float[]>

public final class CosineAverageFunction
extends Object
implements CosineDistanceSensitiveFunction

Computes the cosine of the angle between a target vector and other vectors.

Constructor Summary

Constructors

Constructor and Description
CosineAverageFunction(float[] itemFeatureVector)
CosineAverageFunction(float[][] itemFeatureVectors)

Method Summary

Modifier and Type	Method and Description
double	applyAsDouble(float[] itemVector)
float[]	getTargetVector()

Methods inherited from class java.lang.Object

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

Constructor Detail

CosineAverageFunction

public CosineAverageFunction(float[] itemFeatureVector)

CosineAverageFunction

public CosineAverageFunction(float[][] itemFeatureVectors)

Method Detail

applyAsDouble

public double applyAsDouble(float[] itemVector)

Specified by:

applyAsDouble in interface ToDoubleFunction<float[]>

getTargetVector

public float[] getTargetVector()

Specified by:

getTargetVector in interface CosineDistanceSensitiveFunction

Returns:

vector whose cosine distance to other vectors influence the function value