org.lenskit.mf.svd

Class DomainClampingKernel

java.lang.Object

org.lenskit.mf.svd.DomainClampingKernel

All Implemented Interfaces:

Serializable, BiasedMFKernel

@Shareable
 @Immutable
public class DomainClampingKernel
extends Object
implements BiasedMFKernel, Serializable

Kernel that clamps each feature’s contribution to the preference domain.

Since:

2.1

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
DomainClampingKernel(org.lenskit.data.ratings.PreferenceDomain dom)

Method Summary

Modifier and Type	Method and Description
double	apply(double bias, org.apache.commons.math3.linear.RealVector user, org.apache.commons.math3.linear.RealVector item) Apply the kernel function.
boolean	equals(Object o)
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

DomainClampingKernel

@Inject
public DomainClampingKernel(org.lenskit.data.ratings.PreferenceDomain dom)

Method Detail

apply

public double apply(double bias,
                    @Nonnull
                    org.apache.commons.math3.linear.RealVector user,
                    @Nonnull
                    org.apache.commons.math3.linear.RealVector item)

Description copied from interface: BiasedMFKernel

Apply the kernel function.

Specified by:

apply in interface BiasedMFKernel

Parameters:

bias - The combined user-item bias term (the baseline score, usually).

user - The user-factor vector.

item - The item-factor vector.

Returns:

The kernel function value (combined score).

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object