cc.mallet.fst

Class TransducerEvaluator

java.lang.Object

cc.mallet.fst.TransducerEvaluator

Direct Known Subclasses:

CRFWriter, InstanceAccuracyEvaluator, LabelDistributionEvaluator, MultiSegmentationEvaluator, PerClassAccuracyEvaluator, SegmentationEvaluator, TokenAccuracyEvaluator, ViterbiWriter

public abstract class TransducerEvaluator
extends java.lang.Object

An abstract class to evaluate a transducer model.

Constructor Summary

Constructors

Constructor and Description
TransducerEvaluator()
TransducerEvaluator(InstanceList[] instanceLists, java.lang.String[] instanceListDescriptions)

Method Summary

Modifier and Type	Method and Description
void	evaluate(TransducerTrainer tt) Evaluates a TransducerTrainer and its Transducer on the instance lists specified in the constructor.
abstract void	evaluateInstanceList(TransducerTrainer transducer, InstanceList instances, java.lang.String description)
boolean	precondition(TransducerTrainer tt) If this returns false, then the body of the evaluate(TransducerTrainer) method will not run.

Methods inherited from class java.lang.Object

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

Constructor Detail

TransducerEvaluator

public TransducerEvaluator()

TransducerEvaluator

public TransducerEvaluator(InstanceList[] instanceLists,
                           java.lang.String[] instanceListDescriptions)

Method Detail

evaluate

public void evaluate(TransducerTrainer tt)

Evaluates a TransducerTrainer and its Transducer on the instance lists specified in the constructor. .

The default implementation calls the evaluator's evaluateInstanceList on each instance list.

Parameters:

tt - The TransducerTrainer to evaluate.

precondition

public boolean precondition(TransducerTrainer tt)

If this returns false, then the body of the evaluate(TransducerTrainer) method will not run. Use this method to implement behaviors such as only evaluating every 5 iterations with new TokenAccuracyEvaluator (crft) { public boolean precondition (TransducerTrainer tt) { return tt.getIteration() % 5 == 0; };

evaluateInstanceList

public abstract void evaluateInstanceList(TransducerTrainer transducer,
                                          InstanceList instances,
                                          java.lang.String description)