Package weka.core.stemmers
Class LovinsStemmer
- java.lang.Object
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- weka.core.stemmers.LovinsStemmer
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- All Implemented Interfaces:
java.io.Serializable
,RevisionHandler
,Stemmer
,TechnicalInformationHandler
- Direct Known Subclasses:
IteratedLovinsStemmer
public class LovinsStemmer extends java.lang.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: 1.7 $
- Author:
- Eibe Frank (eibe at cs dot waikato dot ac dot nz)
- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description LovinsStemmer()
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.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.java.lang.String
globalInfo()
Returns a string describing the stemmerstatic void
main(java.lang.String[] args)
Runs the stemmer with the given optionsjava.lang.String
stem(java.lang.String word)
Returns the stemmed version of the given word.java.lang.String
stemString(java.lang.String str)
Stems everything in the given string.java.lang.String
toString()
returns a string representation of the stemmer
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Method Detail
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globalInfo
public java.lang.String globalInfo()
Returns a string describing the stemmer- Returns:
- a description suitable for displaying in the explorer/experimenter gui
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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 interfaceTechnicalInformationHandler
- Returns:
- the technical information about this class
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stem
public java.lang.String stem(java.lang.String word)
Returns the stemmed version of the given word. Word is converted to lower case before stemming.
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stemString
public java.lang.String stemString(java.lang.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
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toString
public java.lang.String toString()
returns a string representation of the stemmer- Overrides:
toString
in classjava.lang.Object
- Returns:
- a string representation of the stemmer
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getRevision
public java.lang.String getRevision()
Returns the revision string.- Specified by:
getRevision
in interfaceRevisionHandler
- Returns:
- the revision
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main
public static void main(java.lang.String[] args)
Runs the stemmer with the given options- Parameters:
args
- the options
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