edu.umass.cs.mallet.base.types

Class FeatureSelection

java.lang.Object

edu.umass.cs.mallet.base.types.FeatureSelection

All Implemented Interfaces:

Serializable

public class FeatureSelection
extends Object
implements Serializable

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
FeatureSelection(Alphabet dictionary)
FeatureSelection(Alphabet dictionary, BitSet selectedFeatures)
FeatureSelection(RankedFeatureVector rsv, int numFeatures)

Method Summary

Modifier and Type	Method and Description
void	add(int index)
void	add(Object o)
int	cardinality()
Object	clone()
boolean	contains(int index)
boolean	contains(Object o)
static FeatureSelection	createFromRegex(Alphabet dictionary, Pattern regex) Creates a FeatureSelection that includes only those features whose names match a given regex.
Alphabet	getAlphabet()
BitSet	getBitSet()
int	nextDeselectedIndex(int index)
int	nextSelectedIndex(int index)
void	or(FeatureSelection fs)
void	remove(int index)
void	remove(Object o)

Methods inherited from class java.lang.Object

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

Constructor Detail

FeatureSelection

public FeatureSelection(Alphabet dictionary,
                        BitSet selectedFeatures)

FeatureSelection

public FeatureSelection(Alphabet dictionary)

FeatureSelection

public FeatureSelection(RankedFeatureVector rsv,
                        int numFeatures)

Method Detail

createFromRegex

public static FeatureSelection createFromRegex(Alphabet dictionary,
                                               Pattern regex)

Creates a FeatureSelection that includes only those features whose names match a given regex. A static factory method.

Parameters:

dictionary - A dictionary of fetaure names. Entries must be string.

regex - Features whose names match this pattern will be included.

Returns:

A new FeatureSelection.

clone

public Object clone()

Overrides:

clone in class Object

getAlphabet

public Alphabet getAlphabet()

cardinality

public int cardinality()

getBitSet

public BitSet getBitSet()

add

public void add(Object o)

add

public void add(int index)

remove

public void remove(Object o)

remove

public void remove(int index)

contains

public boolean contains(Object o)

contains

public boolean contains(int index)

or

public void or(FeatureSelection fs)

nextSelectedIndex

public int nextSelectedIndex(int index)

nextDeselectedIndex

public int nextDeselectedIndex(int index)