Package opennlp.tools.postag

Class POSEvaluator

java.lang.Object

opennlp.tools.util.eval.Evaluator<POSSample>

opennlp.tools.postag.POSEvaluator

public class POSEvaluator
extends Evaluator<POSSample>

The POSEvaluator measures the performance of the given POSTagger with the provided reference samples.

Constructor Summary

Constructors

Constructor	Description
POSEvaluator(POSTagger tagger, POSTaggerEvaluationMonitor... listeners)	Initializes the current instance.

Method Summary

Modifier and Type	Method	Description
double	getWordAccuracy()	Accuracy defined as: word accuracy = correctly detected tags / total words
long	getWordCount()
String	toString()	Represents this object as human-readable String.

Methods inherited from class opennlp.tools.util.eval.Evaluator

evaluate, evaluateSample

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

POSEvaluator

public POSEvaluator(POSTagger tagger,
 POSTaggerEvaluationMonitor... listeners)

Initializes the current instance.

Parameters:

tagger - The POSTagger to evaluate.

listeners - the evaluation listeners.

Method Details

getWordAccuracy

public double getWordAccuracy()

Accuracy defined as: word accuracy = correctly detected tags / total words

Returns:

Retrieves the mean word accuracy.

getWordCount

public long getWordCount()

Returns:

Retrieves the total number of words considered in the evaluation.

toString

public String toString()

Represents this object as human-readable String.

Overrides:

toString in class Object