Package weka.core.stemmers

Class LovinsStemmer

java.lang.Object

weka.core.stemmers.LovinsStemmer

All Implemented Interfaces:

Serializable, RevisionHandler, Stemmer, TechnicalInformationHandler

Direct Known Subclasses:

IteratedLovinsStemmer

public class LovinsStemmer
extends Object
implements Stemmer, TechnicalInformationHandler

A stemmer based on the Lovins stemmer, described here:

Julie Beth Lovins (1968). Development of a stemming algorithm. Mechanical Translation and Computational Linguistics. 11:22-31.

BibTeX:

 @article{Lovins1968,
    author = {Julie Beth Lovins},
    journal = {Mechanical Translation and Computational Linguistics},
    pages = {22-31},
    title = {Development of a stemming algorithm},
    volume = {11},
    year = {1968}
 }
 

Version:

$Revision$

Author:

Eibe Frank (eibe at cs dot waikato dot ac dot nz)

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
LovinsStemmer()

Method Summary

Modifier and Type	Method	Description
String	getRevision()	Returns the revision string.
TechnicalInformation	getTechnicalInformation()	Returns an instance of a TechnicalInformation object, containing detailed information about the technical background of this class, e.g., paper reference or book this class is based on.
String	globalInfo()	Returns a string describing the stemmer
static void	main(String[] args)	Runs the stemmer with the given options
String	stem(String word)	Returns the stemmed version of the given word.
String	stemString(String str)	Stems everything in the given string.
String	toString()	returns a string representation of the stemmer

Methods inherited from class java.lang.Object

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

Constructor Detail

LovinsStemmer

public LovinsStemmer()

Method Detail

globalInfo

public String globalInfo()

Returns a string describing the stemmer

Returns:

a description suitable for displaying in the explorer/experimenter gui

getTechnicalInformation

public TechnicalInformation getTechnicalInformation()

Returns an instance of a TechnicalInformation object, containing detailed information about the technical background of this class, e.g., paper reference or book this class is based on.

Specified by:

getTechnicalInformation in interface TechnicalInformationHandler

Returns:

the technical information about this class

stem

public String stem(String word)

Returns the stemmed version of the given word. Word is converted to lower case before stemming.

Specified by:

stem in interface Stemmer

Parameters:

word - a string consisting of a single word

Returns:

the stemmed word

stemString

public String stemString(String str)

Stems everything in the given string. String is converted to lower case before stemming.

Parameters:

str - the string to stem

Returns:

the processed string

toString

public String toString()

returns a string representation of the stemmer

Overrides:

toString in class Object

Returns:

a string representation of the stemmer

getRevision

public String getRevision()

Returns the revision string.

Specified by:

getRevision in interface RevisionHandler

Returns:

the revision

main

public static void main(String[] args)

Runs the stemmer with the given options

Parameters:

args - the options