Package org.nlpub.watset.eval

Class CachedNormalizedModifiedPurity<V>

java.lang.Object

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

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

public class CachedNormalizedModifiedPurity<V>
extends NormalizedModifiedPurity<V>

Cached normalized modified purity evaluation measure for overlapping clustering.

This class creates an instance of ConcurrentHashMap to cache the cluster element scores. It is designed under assumption that the classes do not change. This assumption is valid for computing the precision (nmPU) in case of normalized modified purity as defined by Kawahara et al. (ACL 2014).

Since the underlying data structure has no size limit, this class is memory-greedy. Please make sure that you have tuned the JVM heap size when using it.

See Also:

• NormalizedModifiedPurity

Field Summary

Fields

Modifier and Type	Field	Description
protected final Map<Map<V,Double>,Double>	cache	The cache.

Constructor Summary

Constructors

Constructor	Description
CachedNormalizedModifiedPurity()	Construct a cached normalized modified purity calculator.
CachedNormalizedModifiedPurity(boolean normalized, boolean modified)	Construct a cached normalized modified purity calculator that allows turning normalized and/or modified options off.

Method Summary

Modifier and Type	Method	Description
double	score(Map<V,Double> cluster, Collection<Map<V,Double>> classes)	Compute the (modified) cluster score on a defined collection of classes.

Methods inherited from class org.nlpub.watset.eval.NormalizedModifiedPurity

delta, evaluate, normalize, purity, transform

Methods inherited from class java.lang.Object

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

Field Details

cache

protected final Map<Map<V,Double>,Double> cache

The cache.

Constructor Details

CachedNormalizedModifiedPurity

public CachedNormalizedModifiedPurity()

Construct a cached normalized modified purity calculator.

CachedNormalizedModifiedPurity

public CachedNormalizedModifiedPurity(boolean normalized,
 boolean modified)

Construct a cached normalized modified purity calculator that allows turning normalized and/or modified options off.

Parameters:

normalized - normalized purity is on

modified - modified purity is on

Method Details

score

public double score(Map<V,Double> cluster,
 Collection<Map<V,Double>> classes)

Description copied from class: NormalizedModifiedPurity

Compute the (modified) cluster score on a defined collection of classes.

Overrides:

score in class NormalizedModifiedPurity<V>

Parameters:

cluster - the cluster to evaluate

classes - the collection of the gold standard clusters

Returns:

cluster score