org.apache.mahout.math.hadoop.similarity.vector
Class DistributedTanimotoCoefficientVectorSimilarity

java.lang.Object
  extended by org.apache.mahout.math.hadoop.similarity.vector.AbstractDistributedVectorSimilarity
      extended by org.apache.mahout.math.hadoop.similarity.vector.DistributedTanimotoCoefficientVectorSimilarity
All Implemented Interfaces:
DistributedVectorSimilarity

public class DistributedTanimotoCoefficientVectorSimilarity
extends AbstractDistributedVectorSimilarity

distributed implementation of the tanimoto coefficient


Constructor Summary
DistributedTanimotoCoefficientVectorSimilarity()
           
 
Method Summary
protected  double doComputeResult(int rowA, int rowB, java.lang.Iterable<Cooccurrence> cooccurrences, double weightOfVectorA, double weightOfVectorB, int numberOfColumns)
          do the actual similarity computation
 double weight(Vector v)
          vectors have no weight (NaN) by default, subclasses may override this
 
Methods inherited from class org.apache.mahout.math.hadoop.similarity.vector.AbstractDistributedVectorSimilarity
countElements, countElements, similarity
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

DistributedTanimotoCoefficientVectorSimilarity

public DistributedTanimotoCoefficientVectorSimilarity()
Method Detail

doComputeResult

protected double doComputeResult(int rowA,
                                 int rowB,
                                 java.lang.Iterable<Cooccurrence> cooccurrences,
                                 double weightOfVectorA,
                                 double weightOfVectorB,
                                 int numberOfColumns)
Description copied from class: AbstractDistributedVectorSimilarity
do the actual similarity computation

Specified by:
doComputeResult in class AbstractDistributedVectorSimilarity
See Also:
DistributedVectorSimilarity.similarity(int, int, Iterable, double, double, int)

weight

public double weight(Vector v)
Description copied from class: AbstractDistributedVectorSimilarity
vectors have no weight (NaN) by default, subclasses may override this

Specified by:
weight in interface DistributedVectorSimilarity
Overrides:
weight in class AbstractDistributedVectorSimilarity


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