Package org.nlpub.watset.eval

Class Pairwise<V>

java.lang.Object

org.nlpub.watset.eval.Pairwise<V>

Type Parameters:

V - the type of cluster elements

public class Pairwise<V>
extends Object

Pairwise precision, recall, and F-score for cluster evaluation.

See Also:

Evaluation of clustering, Manandhar et al. (SemEval 2010), Ustalov et al. (COLI 45:3)

Constructor Summary

Constructors

Constructor	Description
Pairwise()

Method Summary

Modifier and Type	Method	Description
static <V> Stream<org.jgrapht.alg.util.Pair<V,V>>	combination(Collection<V> cluster)	Return a stream of pairs generated as 2-combinations of the cluster elements.
PrecisionRecall	evaluate(Collection<Collection<V>> clusters, Collection<Collection<V>> classes)	Compute a pairwise precision, recall, and F-score.
static <V> org.jgrapht.alg.util.Pair<V,V>	pairOf(V first, V second)	Create a pair of elements ordered by hashCode.
static <V> Set<org.jgrapht.alg.util.Pair<V,V>>	transform(Collection<Collection<V>> clusters)	Transform a collection of clusters to a collection of pairs generated using 2-combinations of the cluster elements.

Methods inherited from class java.lang.Object

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

Constructor Detail

Pairwise

public Pairwise()

Method Detail

transform

public static <V> Set<org.jgrapht.alg.util.Pair<V,V>> transform(Collection<Collection<V>> clusters)

Transform a collection of clusters to a collection of pairs generated using 2-combinations of the cluster elements.

Type Parameters:

V - the type of cluster elements

Parameters:

clusters - the collection of clusters

Returns:

a collection of pairs

combination

public static <V> Stream<org.jgrapht.alg.util.Pair<V,V>> combination(Collection<V> cluster)

Return a stream of pairs generated as 2-combinations of the cluster elements.

Type Parameters:

V - the type of cluster elements

Parameters:

cluster - the cluster

Returns:

a stream of 2-combinations

pairOf

public static <V> org.jgrapht.alg.util.Pair<V,V> pairOf(V first,
                                                              V second)

Create a pair of elements ordered by hashCode.

Type Parameters:

V - the type of objects

Parameters:

first - the first object

second - the second object

Returns:

a pair

evaluate

public PrecisionRecall evaluate(Collection<Collection<V>> clusters,
                                Collection<Collection<V>> classes)

Compute a pairwise precision, recall, and F-score.

Parameters:

clusters - the collection of the clusters to evaluate

classes - the collection of the gold standard clusters

Returns:

precision and recalled wrapped in an instance of PrecisionRecall