Package cc.mallet.cluster.iterator

Class ClusterSampleIterator

java.lang.Object

cc.mallet.cluster.iterator.NeighborIterator

cc.mallet.cluster.iterator.PairSampleIterator

cc.mallet.cluster.iterator.ClusterSampleIterator

All Implemented Interfaces:

java.util.Iterator<Instance>

Direct Known Subclasses:

NodeClusterSampleIterator

public class ClusterSampleIterator
extends PairSampleIterator

Sample clusters of Instances.

Since:

1.0

Version:

1.0

Author:

"Aron Culotta"

Field Summary

Fields inherited from class cc.mallet.cluster.iterator.PairSampleIterator

instances, nonsingletonClusters, numberSamples, positiveCount, positiveProportion, positiveTarget, random, totalCount

Fields inherited from class cc.mallet.cluster.iterator.NeighborIterator

clustering

Constructor Summary

Constructors

Constructor	Description
ClusterSampleIterator(Clustering clustering, Randoms random, double positiveProportion, int numberSamples)

Method Summary

Modifier and Type	Method	Description
Instance	next()
protected int[]	sampleFromArray(int[] a, Randoms random, int minSize)	Samples a subset of elements from this array.
protected int[][]	sampleSplitFromArray(int[] a, Randoms random, int minSize)	Samples a two disjoint subset of elements from this array.

Methods inherited from class cc.mallet.cluster.iterator.PairSampleIterator

hasNext

Methods inherited from class cc.mallet.cluster.iterator.NeighborIterator

getClustering, remove

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Detail

ClusterSampleIterator

public ClusterSampleIterator(Clustering clustering,
                             Randoms random,
                             double positiveProportion,
                             int numberSamples)

Parameters:

clustering - True clustering.

random - Source of randomness.

positiveProportion - Proportion of Instances that should be positive examples.

numberSamples - Total number of samples to generate.

Method Detail

next

public Instance next()

Specified by:

next in interface java.util.Iterator<Instance>

Overrides:

next in class PairSampleIterator

sampleFromArray

protected int[] sampleFromArray(int[] a,
                                Randoms random,
                                int minSize)

Samples a subset of elements from this array.

Parameters:

a -

random -

Returns:

sampleSplitFromArray

protected int[][] sampleSplitFromArray(int[] a,
                                       Randoms random,
                                       int minSize)

Samples a two disjoint subset of elements from this array.

Parameters:

a -

random -

Returns: