edu.umass.cs.mallet.base.fst

Class SimpleTagger.SimpleTaggerSentence2FeatureVectorSequence

java.lang.Object

edu.umass.cs.mallet.base.pipe.Pipe

edu.umass.cs.mallet.base.fst.SimpleTagger.SimpleTaggerSentence2FeatureVectorSequence

All Implemented Interfaces:

Serializable

Enclosing class:

SimpleTagger

public static class SimpleTagger.SimpleTaggerSentence2FeatureVectorSequence
extends Pipe

Converts an external encoding of a sequence of elements with binary features to a FeatureVectorSequence. If target processing is on (training or labeled test data), it extracts element labels from the external encoding to create a target LabelSequence. Two external encodings are supported:

1. A String containing lines of whitespace-separated tokens.
2. a String[][].

Both represent rows of tokens. When target processing is on, the last token in each row is the label of the sequence element represented by this row. All other tokens in the row, or all tokens in the row if not target processing, are the names of features that are on for the sequence element described by the row.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
SimpleTaggerSentence2FeatureVectorSequence() Creates a new SimpleTaggerSentence2FeatureVectorSequence instance.

Method Summary

Modifier and Type	Method and Description
Instance	pipe(Instance carrier) Process an Instance.

Methods inherited from class edu.umass.cs.mallet.base.pipe.Pipe

getDataAlphabet, getInstanceId, getParent, getParentRoot, getTargetAlphabet, isDataAlphabetSet, isTargetProcessing, pipe, readResolve, resolveDataAlphabet, resolveTargetAlphabet, setDataAlphabet, setParent, setTargetAlphabet, setTargetProcessing

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleTaggerSentence2FeatureVectorSequence

public SimpleTaggerSentence2FeatureVectorSequence()

Creates a new SimpleTaggerSentence2FeatureVectorSequence instance.

Method Detail

pipe

public Instance pipe(Instance carrier)

Description copied from class: Pipe

Process an Instance. This method takes an input Instance, destructively modifies it in some way, and returns it. This is the method by which all pipes are eventually run.

One can create a new concrete subclass of Pipe simply by implementing this method.

Specified by:

pipe in class Pipe

Parameters:

carrier - Instance to be processed.