weka.classifiers.mi.supportVector

Class MIPolyKernel

java.lang.Object

weka.classifiers.functions.supportVector.Kernel

weka.classifiers.functions.supportVector.CachedKernel

weka.classifiers.functions.supportVector.PolyKernel

weka.classifiers.mi.supportVector.MIPolyKernel

All Implemented Interfaces:

Serializable, CapabilitiesHandler, MultiInstanceCapabilitiesHandler, OptionHandler, RevisionHandler

public class MIPolyKernel
extends PolyKernel
implements MultiInstanceCapabilitiesHandler

The polynomial kernel : K(x, y) = <x, y>^p or K(x, y) = (<x, y>+1)^p

Valid options are:

 -D
  Enables debugging output (if available) to be printed.
  (default: off)

 -no-checks
  Turns off all checks - use with caution!
  (default: checks on)

 -C <num>
  The size of the cache (a prime number), 0 for full cache and 
  -1 to turn it off.
  (default: 250007)

 -E <num>
  The Exponent to use.
  (default: 1.0)

 -L
  Use lower-order terms.
  (default: no)

Version:

$Revision: 1.4 $

Author:

Eibe Frank (eibe@cs.waikato.ac.nz), Shane Legg (shane@intelligenesis.net) (sparse vector code), Stuart Inglis (stuart@reeltwo.com) (sparse vector code), Lin Dong (ld21@cs.waikato.ac.nz) (MIkernel)

See Also:

Serialized Form

Field Summary

Fields inherited from class weka.classifiers.functions.supportVector.PolyKernel

m_exponent, m_lowerOrder

Fields inherited from class weka.classifiers.functions.supportVector.CachedKernel

m_cacheHits, m_cacheSize, m_cacheSlots, m_kernelEvals, m_kernelMatrix, m_keys, m_numInsts, m_storage

Fields inherited from class weka.classifiers.functions.supportVector.Kernel

m_ChecksTurnedOff, m_data, m_Debug

Constructor Summary

Constructors

Constructor and Description
MIPolyKernel() default constructor - does nothing.
MIPolyKernel(Instances data, int cacheSize, double exponent, boolean lowerOrder) Creates a new MIPolyKernel instance.

Method Summary

Modifier and Type	Method and Description
protected double	evaluate(int id1, int id2, Instance inst1) This method is overridden in subclasses to implement specific kernels.
Capabilities	getCapabilities() Returns the Capabilities of this kernel.
Capabilities	getMultiInstanceCapabilities() Returns the capabilities of this multi-instance kernel for the relational data.
String	getRevision() Returns the revision string.

Methods inherited from class weka.classifiers.functions.supportVector.PolyKernel

exponentTipText, getExponent, getOptions, getUseLowerOrder, globalInfo, listOptions, setExponent, setOptions, setUseLowerOrder, toString, useLowerOrderTipText

Methods inherited from class weka.classifiers.functions.supportVector.CachedKernel

buildKernel, cacheSizeTipText, clean, dotProd, eval, getCacheSize, initVars, numCacheHits, numEvals, setCacheSize

Methods inherited from class weka.classifiers.functions.supportVector.Kernel

checksTurnedOffTipText, debugTipText, forName, getChecksTurnedOff, getDebug, makeCopies, makeCopy, setChecksTurnedOff, setDebug

Methods inherited from class java.lang.Object

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

Constructor Detail

MIPolyKernel

public MIPolyKernel()

default constructor - does nothing.

MIPolyKernel

public MIPolyKernel(Instances data,
                    int cacheSize,
                    double exponent,
                    boolean lowerOrder)
             throws Exception

Creates a new MIPolyKernel instance.

Parameters:

data - the training dataset used.

cacheSize - the size of the cache (a prime number)

exponent - the exponent to use

lowerOrder - whether to use lower-order terms

Throws:

Exception - if something goes wrong

Method Detail

evaluate

protected double evaluate(int id1,
                          int id2,
                          Instance inst1)
                   throws Exception

Description copied from class: CachedKernel

This method is overridden in subclasses to implement specific kernels.

Overrides:

evaluate in class PolyKernel

Parameters:

id1 - the index of instance 1

id2 - the index of instance 2

inst1 - the instance 1 object

Returns:

the dot product

Throws:

Exception - if something goes wrong

getCapabilities

public Capabilities getCapabilities()

Returns the Capabilities of this kernel.

Specified by:

getCapabilities in interface CapabilitiesHandler

Overrides:

getCapabilities in class PolyKernel

Returns:

the capabilities of this object

See Also:

Capabilities

getMultiInstanceCapabilities

public Capabilities getMultiInstanceCapabilities()

Returns the capabilities of this multi-instance kernel for the relational data.

Specified by:

getMultiInstanceCapabilities in interface MultiInstanceCapabilitiesHandler

Returns:

the capabilities of this object

See Also:

Capabilities

getRevision

public String getRevision()

Returns the revision string.

Specified by:

getRevision in interface RevisionHandler

Overrides:

getRevision in class PolyKernel

Returns:

the revision