jsat.text.stemming

Class Stemmer

java.lang.Object

jsat.text.stemming.Stemmer

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

LovinsStemmer, PaiceHuskStemmer, PorterStemmer, VoidStemmer

public abstract class Stemmer
extends Object
implements Serializable

Stemmers are algorithms that attempt reduce strings to their common stem or root word. For example, a stemmer might idly reduce "runs" "running" and "ran" to the single stem word "run". This reduces the feature space size, and allows multiple words that have the same meaning to be counted together.
Do not expect perfect results from stemming. This class provides the contract for a stemmer that does not have any word history.

Author:

Edward Raff

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Stemmer()

Method Summary

Modifier and Type	Method and Description
void	applyTo(List<String> list) Replaces each value in the list with the stemmed version of the word
void	applyTo(String[] arr) Replaces each value in the array with the stemmed version of the word
abstract String	stem(String word) Reduce the given input to its stem word

Methods inherited from class java.lang.Object

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

Constructor Detail

Stemmer

public Stemmer()

Method Detail

stem

public abstract String stem(String word)

Reduce the given input to its stem word

Parameters:

word - the unstemmed input word

Returns:

the stemmed version of the word

applyTo

public void applyTo(List<String> list)

Replaces each value in the list with the stemmed version of the word

Parameters:

list - the list to apply stemming to

applyTo

public void applyTo(String[] arr)

Replaces each value in the array with the stemmed version of the word

Parameters:

arr - the array to apply stemming to