Package cc.mallet.types

Class BiNormalSeparation

java.lang.Object

cc.mallet.types.SparseVector

cc.mallet.types.FeatureVector

cc.mallet.types.RankedFeatureVector

cc.mallet.types.BiNormalSeparation

All Implemented Interfaces:

AlphabetCarrying, ConstantMatrix, Vector, java.io.Serializable

public class BiNormalSeparation
extends RankedFeatureVector

Bi-Normal Separation is a feature weighting algorithm introduced in: An Extensive Empirical Study of Feature Selection Metrics for Text Classification, George Forman, Journal of Machine Learning Research, 3:1289--1305, 2003. http://www.hpl.hp.com/techreports/2002/HPL-2002-88R2.html It was been shown to have excellent performance when used for feature selection and feature weighting on binary SVM classification tasks.

Author:

Clint Burford

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	BiNormalSeparation.Factory	Factory class.

Nested classes/interfaces inherited from class cc.mallet.types.RankedFeatureVector

RankedFeatureVector.PerLabelFactory

Field Summary

Fields inherited from class cc.mallet.types.SparseVector

hasInfinite, indices, values

Constructor Summary

Constructors

Constructor	Description
BiNormalSeparation(InstanceList ilist)	Create a new feature ranking for the given instance list.

Method Summary

Methods inherited from class cc.mallet.types.RankedFeatureVector

getIndexAtRank, getMaxValue, getMaxValuedIndex, getMaxValuedIndexIn, getMaxValuedObject, getMaxValuedObjectIn, getMaxValueIn, getObjectAtRank, getRank, getRank, getValueAtRank, printByRank, printByRank, printLowerK, printTopK, set, setRankOrder, setRankOrder, setRankOrder, setReverseRankOrder

Methods inherited from class cc.mallet.types.FeatureVector

alphabetsMatch, cloneMatrix, cloneMatrixZeroed, contains, getAlphabet, getAlphabets, getObjectIndices, location, newFeatureVector, toSimpFile, toString, toString, value

Methods inherited from class cc.mallet.types.SparseVector

absNorm, addTo, addTo, arrayCopyFrom, arrayCopyFrom, arrayCopyInto, dotProduct, dotProduct, dotProduct, dotProduct, extendedDotProduct, extendedDotProduct, getDimensions, getIndices, getNumDimensions, getValues, incrementValue, indexAtLocation, infinityNorm, isBinary, isInfinite, isNaN, isNaNOrInfinite, location, makeBinary, makeNonBinary, map, numLocations, oneNorm, plusEqualsSparse, plusEqualsSparse, print, removeDuplicates, setAll, setValue, setValueAtLocation, singleIndex, singleSize, singleToIndices, singleValue, sortIndices, timesEquals, timesEqualsSparse, timesEqualsSparse, timesEqualsSparseZero, twoNorm, value, value, valueAtLocation, vectorAdd

Methods inherited from class java.lang.Object

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

Constructor Detail

BiNormalSeparation

public BiNormalSeparation(InstanceList ilist)

Create a new feature ranking for the given instance list.