org.apache.mahout.math.stats.entropy
Classes 
CalculateEntropyMapper
CalculateEntropyReducer
CalculateSpecificConditionalEntropyMapper
ConditionalEntropy
DoubleSumReducer
Entropy
GroupAndCountByKeyAndValueMapper
InformationGain
InformationGainRatio
KeyCounterMapper
SpecificConditionalEntropyMapper
SpecificConditionalEntropyReducer
ValueCounterMapper
VarIntSumReducer