org.apache.mahout.clustering.iterator
Class DirichletClusteringPolicy

java.lang.Object
  extended by org.apache.mahout.clustering.iterator.AbstractClusteringPolicy
      extended by org.apache.mahout.clustering.iterator.DirichletClusteringPolicy
All Implemented Interfaces:
org.apache.hadoop.io.Writable, ClusteringPolicy

public class DirichletClusteringPolicy
extends AbstractClusteringPolicy


Constructor Summary
DirichletClusteringPolicy()
           
DirichletClusteringPolicy(int k, double alpha0)
           
 
Method Summary
 void readFields(DataInput in)
           
 Vector select(Vector probabilities)
          Return a vector of weights for each of the models given those probabilities
 void update(ClusterClassifier prior)
          Update the policy with the given classifier
 void write(DataOutput out)
           
 
Methods inherited from class org.apache.mahout.clustering.iterator.AbstractClusteringPolicy
classify, close
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

DirichletClusteringPolicy

public DirichletClusteringPolicy()

DirichletClusteringPolicy

public DirichletClusteringPolicy(int k,
                                 double alpha0)
Parameters:
k - The number of models to create from prior
alpha0 - The alpha_0 parameter to the Dirichlet Distribution.
Method Detail

select

public Vector select(Vector probabilities)
Description copied from interface: ClusteringPolicy
Return a vector of weights for each of the models given those probabilities

Specified by:
select in interface ClusteringPolicy
Overrides:
select in class AbstractClusteringPolicy
Parameters:
probabilities - a Vector of pdfs
Returns:
a Vector of weights

update

public void update(ClusterClassifier prior)
Description copied from interface: ClusteringPolicy
Update the policy with the given classifier

Specified by:
update in interface ClusteringPolicy
Overrides:
update in class AbstractClusteringPolicy
Parameters:
prior - a ClusterClassifier

write

public void write(DataOutput out)
           throws IOException
Specified by:
write in interface org.apache.hadoop.io.Writable
Specified by:
write in class AbstractClusteringPolicy
Throws:
IOException

readFields

public void readFields(DataInput in)
                throws IOException
Specified by:
readFields in interface org.apache.hadoop.io.Writable
Specified by:
readFields in class AbstractClusteringPolicy
Throws:
IOException


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