edu.columbia.cs.ref.model.core.impl
Class BagOfNGramsKernel

java.lang.Object
  edu.columbia.cs.ref.model.core.Core
      edu.columbia.cs.ref.model.core.Kernel
          edu.columbia.cs.ref.model.core.impl.BagOfNGramsKernel

All Implemented Interfaces:

edu.berkeley.compbio.jlibsvm.kernel.KernelFunction<OperableStructure>, java.io.Serializable

public class BagOfNGramsKernel
extends Kernel

See Also:

Serialized Form

Constructor Summary

BagOfNGramsKernel()

Method Summary

OperableStructure	createOperableStructure(CandidateSentence sent)
double	evaluate(OperableStructure s1, OperableStructure s2)
double	kernel(TaggedBagOfNgrams s1, TaggedBagOfNgrams s2)
double	normKernel(TaggedBagOfNgrams s1, TaggedBagOfNgrams s2) Computes the normalized string kernel between two strings.
double	selfKernel(TaggedBagOfNgrams s)

Methods inherited from class edu.columbia.cs.ref.model.core.Core

getMandatoryFeatureGenerators, getStructure

Methods inherited from class java.lang.Object

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

Constructor Detail

BagOfNGramsKernel

public BagOfNGramsKernel()

Method Detail

normKernel

public double normKernel(TaggedBagOfNgrams s1,
                         TaggedBagOfNgrams s2)

Computes the normalized string kernel between two strings.

Parameters:

s1 - string 1

s2 - string 2

Returns:

normalized value, with 1 for exact match.

selfKernel

public double selfKernel(TaggedBagOfNgrams s)

kernel

public double kernel(TaggedBagOfNgrams s1,
                     TaggedBagOfNgrams s2)

createOperableStructure

public OperableStructure createOperableStructure(CandidateSentence sent)

evaluate

public double evaluate(OperableStructure s1,
                       OperableStructure s2)