Package opennlp.tools.parser

Class ParserCrossValidator

java.lang.Object

opennlp.tools.parser.ParserCrossValidator

public class ParserCrossValidator
extends Object

Cross validator for a Parser.

Constructor Summary

Constructors

Constructor	Description
ParserCrossValidator(String languageCode, TrainingParameters params, HeadRules rules, ParserType parserType, ParserEvaluationMonitor... monitors)	Initializes a ParserCrossValidator instance via given parameters.

Method Summary

Modifier and Type	Method	Description
void	evaluate(ObjectStream<Parse> samples, int nFolds)	Starts the evaluation.
FMeasure	getFMeasure()

Methods inherited from class java.lang.Object

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

Constructor Detail

ParserCrossValidator

public ParserCrossValidator(String languageCode,
                            TrainingParameters params,
                            HeadRules rules,
                            ParserType parserType,
                            ParserEvaluationMonitor... monitors)

Initializes a ParserCrossValidator instance via given parameters.

Parameters:

languageCode - An ISO conform language code.

params - The TrainingParameters for the context of cross validation.

rules - The HeadRules for the context of cross validation.

parserType - The ParserType for the context of cross validation.

monitors - the evaluation listeners.

Method Detail

evaluate

public void evaluate(ObjectStream<Parse> samples,
                     int nFolds)
              throws IOException

Starts the evaluation.

Parameters:

samples - The ObjectStream of samples to train and test with.

nFolds - Number of folds. It must be greater than zero.

Throws:

IOException - Thrown if IO errors occurred.

IllegalStateException - Thrown if the currently active ParserType is not supported.

getFMeasure

public FMeasure getFMeasure()