com.hankcs.hanlp.classification.features

Class TfIdfFeatureWeighter

java.lang.Object

com.hankcs.hanlp.classification.features.TfIdfFeatureWeighter

All Implemented Interfaces:

IFeatureWeighter, Serializable

public class TfIdfFeatureWeighter
extends Object
implements IFeatureWeighter

TF-IDF权重计算

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
TfIdfFeatureWeighter(int numDocs, int[] df)

Method Summary

Modifier and Type	Method and Description
double	weight(int feature, int tf) 计算权重

Methods inherited from class java.lang.Object

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

Constructor Detail

TfIdfFeatureWeighter

public TfIdfFeatureWeighter(int numDocs,
                            int[] df)

Method Detail

weight

public double weight(int feature,
                     int tf)

Description copied from interface: IFeatureWeighter

计算权重

Specified by:

weight in interface IFeatureWeighter

Parameters:

feature - 词的id

Returns:

权重