edu.umass.cs.mallet.base.types
Class InfoGain

java.lang.Object
  extended byedu.umass.cs.mallet.base.types.SparseVector
      extended byedu.umass.cs.mallet.base.types.FeatureVector
          extended byedu.umass.cs.mallet.base.types.RankedFeatureVector
              extended byedu.umass.cs.mallet.base.types.InfoGain
All Implemented Interfaces:
ConstantMatrix, java.io.Serializable, Vector

public class InfoGain
extends RankedFeatureVector

See Also:
Serialized Form

Nested Class Summary
static class InfoGain.Factory
           
 
Nested classes inherited from class edu.umass.cs.mallet.base.types.RankedFeatureVector
RankedFeatureVector.PerLabelFactory
 
Field Summary
 
Fields inherited from class edu.umass.cs.mallet.base.types.SparseVector
hasInfinite, indices, values
 
Constructor Summary
InfoGain(Alphabet vocab, double[] infogains)
           
InfoGain(InstanceList ilist)
           
 
Method Summary
 double getBaseEntropy()
           
 LabelVector getBaseLabelDistribution()
           
 
Methods inherited from class edu.umass.cs.mallet.base.types.RankedFeatureVector
getIndexAtRank, getMaxValue, getMaxValuedIndex, getMaxValuedIndexIn, getMaxValuedObject, getMaxValuedObjectIn, getMaxValueIn, getObjectAtRank, getRank, getRank, getValueAtRank, printByRank, printByRank, set, setRankOrder, setRankOrder, setRankOrder
 
Methods inherited from class edu.umass.cs.mallet.base.types.FeatureVector
cloneMatrix, cloneMatrixZeroed, contains, getAlphabet, getObjectIndices, location, toSimpFile, toString, toString, value
 
Methods inherited from class edu.umass.cs.mallet.base.types.SparseVector
absNorm, addTo, addTo, arrayCopyFrom, arrayCopyFrom, arrayCopyInto, dotProduct, dotProduct, dotProduct, dotProduct, extendedDotProduct, extendedDotProduct, getDimensions, getIndices, getNumDimensions, getValues, incrementValue, indexAtLocation, infinityNorm, isBinary, isNaN, location, makeBinary, makeNonBinary, map, numLocations, oneNorm, plusEqualsSparse, plusEqualsSparse, print, removeDuplicates, setAll, setValue, setValueAtLocation, singleIndex, singleSize, singleToIndices, singleValue, sortIndices, timesEquals, timesEqualsSparse, timesEqualsSparse, twoNorm, value, value, valueAtLocation, vectorAdd
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

InfoGain

public InfoGain(InstanceList ilist)

InfoGain

public InfoGain(Alphabet vocab,
                double[] infogains)
Method Detail

getBaseEntropy

public double getBaseEntropy()

getBaseLabelDistribution

public LabelVector getBaseLabelDistribution()