smile.feature

Class Bag

java.lang.Object

smile.feature.Bag

public class Bag
extends java.lang.Object

The bag-of-words feature of text used in natural language processing and information retrieval. In this model, a text (such as a sentence or a document) is represented as an unordered collection of words, disregarding grammar and even word order.

Constructor Summary

Constructors

Constructor and Description
Bag(java.lang.String[] words) Constructor.
Bag(java.lang.String[] words, boolean binary) Constructor.

Method Summary

Modifier and Type	Method and Description
int[]	apply(java.lang.String[] x) Returns the bag-of-words features of a document.

Methods inherited from class java.lang.Object

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

Constructor Detail

Bag

public Bag(java.lang.String[] words)

Constructor.

Parameters:

words - the list of feature words.

Bag

public Bag(java.lang.String[] words,
           boolean binary)

Constructor.

Parameters:

words - the list of feature words. The feature words should be unique in the list. Note that the Bag class doesn't learn the features, but just use them as attributes.

binary - true to check if feature object appear in a collection instead of their frequencies.

Method Detail

apply

public int[] apply(java.lang.String[] x)

Returns the bag-of-words features of a document.