TransducerTrainer (Mallet 2 API)

java.lang.Object
- cc.mallet.fst.TransducerTrainer

Direct Known Subclasses:

CRFTrainerByEntropyRegularization, CRFTrainerByGE, CRFTrainerByLabelLikelihood, CRFTrainerByLikelihoodAndGE, CRFTrainerByPR, CRFTrainerByThreadedLabelLikelihood, CRFTrainerByValueGradients, HMMTrainerByLikelihood, MEMMTrainer, NoopTransducerTrainer, ShallowTransducerTrainer, TransducerTrainer.ByIncrements
```
public abstract class TransducerTrainer
extends java.lang.Object
```
An abstract class to train and evaluate a transducer model.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static class`	`TransducerTrainer.ByIncrements`
`static class`	`TransducerTrainer.ByInstanceIncrements`
`static interface`	`TransducerTrainer.ByOptimization`

Constructor Summary

Constructors
Constructor Description

TransducerTrainer()

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`TransducerTrainer`	`addEvaluator(TransducerEvaluator te)`
`TransducerTrainer`	`addEvaluators(java.util.Collection<TransducerEvaluator> tes)`
`abstract int`	`getIteration()`
`abstract Transducer`	`getTransducer()`
`abstract boolean`	`isFinishedTraining()`
`TransducerTrainer`	`removeEvaluator(TransducerEvaluator te)`
`protected void`	`runEvaluators()`	This method should be called by subclasses whenever evaluators should be run.
`boolean`	`train(InstanceList trainingSet)`
`abstract boolean`	`train(InstanceList trainingSet, int numIterations)`	Train the transducer associated with this TransducerTrainer.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - TransducerTrainer
```
public TransducerTrainer()
```
- Method Detail
  - getTransducer
```
public abstract Transducer getTransducer()
```
  - getIteration
```
public abstract int getIteration()
```
  - isFinishedTraining
```
public abstract boolean isFinishedTraining()
```
  - train
```
public boolean train(InstanceList trainingSet)
```
  - train
```
public abstract boolean train(InstanceList trainingSet,
                              int numIterations)
```
    Train the transducer associated with this TransducerTrainer. You should be able to call this method with different trainingSet objects. Whether this causes the TransducerTrainer to combine both trainingSets or to view the second as a new alternative is at the discretion of the particular TransducerTrainer subclass involved.
  - addEvaluator
```
public TransducerTrainer addEvaluator(TransducerEvaluator te)
```
  - addEvaluators
```
public TransducerTrainer addEvaluators(java.util.Collection<TransducerEvaluator> tes)
```
  - removeEvaluator
```
public TransducerTrainer removeEvaluator(TransducerEvaluator te)
```
  - runEvaluators
```
protected void runEvaluators()
```
    This method should be called by subclasses whenever evaluators should be run. Do not worry too much about them being run too often, because the evaluators themselves can control/limit when they actually do their work with TransducerEvaluator.precondition().