org.biojava.stats.svm

Class CachingKernel

java.lang.Object

org.biojava.stats.svm.NestedKernel

org.biojava.stats.svm.CachingKernel

All Implemented Interfaces:

Serializable, SVMKernel

public class CachingKernel
extends NestedKernel

Caches the results of a nested kernel so that k(a, b) need only be calculated once.

This kernel is thread-safe. However, care must be taken when setting the nested kernel that no other thread is retrieving values at the same time. This would cause a race condition in which the newly flushed cache may contain a value from the previous kernel.

Author:

Thomas Down, Matthew Pocock

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
CachingKernel()
CachingKernel(SVMKernel k)

Method Summary

Methods

Modifier and Type	Method and Description
double	evaluate(Object x, Object y) Return the dot product of two vectors in an arbitrary feature space.
void	setNestedKernel(SVMKernel k) Set the SVMKernel to nest to k.
String	toString()

Methods inherited from class org.biojava.stats.svm.NestedKernel

getNestedKernel

Methods inherited from class java.lang.Object

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

Constructor Detail

CachingKernel

public CachingKernel()

CachingKernel

public CachingKernel(SVMKernel k)

Method Detail

setNestedKernel

public void setNestedKernel(SVMKernel k)

Description copied from class: NestedKernel

Set the SVMKernel to nest to k.

Overrides:

setNestedKernel in class NestedKernel

Parameters:

k - the SVMKernel to nest.

evaluate

public double evaluate(Object x,
              Object y)

Description copied from interface: SVMKernel

Return the dot product of two vectors in an arbitrary feature space. In this implementation, the `vectors' can actually be arbitrary objects.

toString

public String toString()

Overrides:

toString in class Object