cc.mallet.pipe

Class Array2FeatureVector

java.lang.Object

cc.mallet.pipe.Pipe

cc.mallet.pipe.Array2FeatureVector

All Implemented Interfaces:

AlphabetCarrying, java.io.Serializable

public class Array2FeatureVector
extends Pipe

Converts a Java array of numerical types to a FeatureVector, where the Alphabet is the data array index wrapped in an Integer object.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Array2FeatureVector()
Array2FeatureVector(Alphabet dataAlphabet, Alphabet targetAlphabet) Construct a pipe based on the dimensions of the data and target.
Array2FeatureVector(int capacity)

Method Summary

Modifier and Type	Method and Description
Instance	pipe(Instance carrier) Convert the data in an Instance from an array to a FeatureVector leaving other fields unchanged.
int	size() Current size of the Vocabulary

Methods inherited from class cc.mallet.pipe.Pipe

alphabetsMatch, getAlphabet, getAlphabets, getDataAlphabet, getInstanceId, getTargetAlphabet, instanceFrom, instancesFrom, instancesFrom, isDataAlphabetSet, isTargetProcessing, newIteratorFrom, precondition, readResolve, setDataAlphabet, setOrCheckDataAlphabet, setOrCheckTargetAlphabet, setTargetAlphabet, setTargetProcessing

Methods inherited from class java.lang.Object

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

Constructor Detail

Array2FeatureVector

public Array2FeatureVector(int capacity)

Array2FeatureVector

public Array2FeatureVector()

Array2FeatureVector

public Array2FeatureVector(Alphabet dataAlphabet,
                           Alphabet targetAlphabet)

Construct a pipe based on the dimensions of the data and target.

Method Detail

pipe

public Instance pipe(Instance carrier)
              throws java.lang.IllegalStateException

Convert the data in an Instance from an array to a FeatureVector leaving other fields unchanged. Instance.getData() must return a numeric array, and it is cast to double[]

Overrides:

pipe in class Pipe

Throws:

java.lang.IllegalStateException - If Instance.getTarget() is not a Labeling

size

public int size()

Current size of the Vocabulary