Class DocumentCategorizerEvaluator

java.lang.Object

opennlp.tools.util.eval.Evaluator<opennlp.tools.doccat.DocumentSample>

opennlp.tools.doccat.DocumentCategorizerEvaluator

public class DocumentCategorizerEvaluator
extends Evaluator<opennlp.tools.doccat.DocumentSample>

The DocumentCategorizerEvaluator measures the performance of the given DocumentCategorizer with the provided reference samples.

See Also:

• DocumentCategorizer
• DocumentSample
• Evaluator

Constructor Summary

Constructors

Constructor	Description
DocumentCategorizerEvaluator(opennlp.tools.doccat.DocumentCategorizer categorizer, opennlp.tools.doccat.DoccatEvaluationMonitor... listeners)	Initializes a DocumentCategorizerEvaluator instance.

Method Summary

Modifier and Type	Method	Description
double	getAccuracy()	accuracy = correctly categorized documents / total documents
long	getDocumentCount()
opennlp.tools.doccat.DocumentSample	processSample(opennlp.tools.doccat.DocumentSample sample)	Evaluates the given reference sample.
String	toString()	Represents this object as human-readable String.

Methods inherited from class Evaluator

evaluate, evaluateSample

Methods inherited from class Object

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

Constructor Details

DocumentCategorizerEvaluator

public DocumentCategorizerEvaluator(opennlp.tools.doccat.DocumentCategorizer categorizer,
 opennlp.tools.doccat.DoccatEvaluationMonitor... listeners)

Initializes a DocumentCategorizerEvaluator instance.

Parameters:

categorizer - the DocumentCategorizer instance.

listeners - the evaluation listeners.

Method Details

processSample

public opennlp.tools.doccat.DocumentSample processSample(opennlp.tools.doccat.DocumentSample sample)

Evaluates the given reference sample.

This is done by categorizing the document from the provided DocumentSample. The detected category is then used to calculate and update the score.

Parameters:

sample - The reference TokenSample.

Returns:

The processed TokenSample.

getAccuracy

public double getAccuracy()

accuracy = correctly categorized documents / total documents

Returns:

Retrieves the accuracy of provided DocumentCategorizer.

getDocumentCount

public long getDocumentCount()

toString

public String toString()

Represents this object as human-readable String.

Overrides:

toString in class Object