public class NormalizationH1 extends Normalization
While this model is parameterless in the
original article,
information-based models (see IBSimilarity
) introduced a
multiplying factor.
The default value for the c
parameter is 1
.
Normalization.NoNormalization
Constructor and Description |
---|
NormalizationH1()
Calls
NormalizationH1(1) |
NormalizationH1(float c)
Creates NormalizationH1 with the supplied parameter
c . |
Modifier and Type | Method and Description |
---|---|
Explanation |
explain(BasicStats stats,
double tf,
double len)
Returns an explanation for the normalized term frequency.
|
float |
getC()
Returns the
c parameter. |
double |
tfn(BasicStats stats,
double tf,
double len)
Returns the normalized term frequency.
|
String |
toString()
Subclasses must override this method to return the code of the
normalization formula.
|
public NormalizationH1(float c)
c
.c
- hyper-parameter that controls the term frequency
normalization with respect to the document length.public NormalizationH1()
NormalizationH1(1)
public final double tfn(BasicStats stats, double tf, double len)
Normalization
tfn
in class Normalization
len
- the field length.public Explanation explain(BasicStats stats, double tf, double len)
Normalization
The default normalization methods use the field length of the document and the average field length to compute the normalized term frequency. This method provides a generic explanation for such methods. Subclasses that use other statistics must override this method.
explain
in class Normalization
public String toString()
Normalization
toString
in class Normalization
public float getC()
c
parameter.NormalizationH1(float)
Copyright © 2000-2019 Apache Software Foundation. All Rights Reserved.