org.apache.lucene.search.similarities
Class NormalizationZ
java.lang.Object
org.apache.lucene.search.similarities.Normalization
org.apache.lucene.search.similarities.NormalizationZ
public class NormalizationZ
- extends Normalization
Pareto-Zipf Normalization
- WARNING: This API is experimental and might change in incompatible ways in the next release.
Method Summary |
float |
getZ()
|
float |
tfn(BasicStats stats,
float tf,
float len)
Returns the normalized term frequency. |
String |
toString()
Subclasses must override this method to return the code of the
normalization formula. |
NormalizationZ
public NormalizationZ()
NormalizationZ
public NormalizationZ(float z)
tfn
public float tfn(BasicStats stats,
float tf,
float len)
- Description copied from class:
Normalization
- Returns the normalized term frequency.
- Specified by:
tfn
in class Normalization
len
- the field length.
toString
public String toString()
- Description copied from class:
Normalization
- Subclasses must override this method to return the code of the
normalization formula. Refer to the original paper for the list.
- Specified by:
toString
in class Normalization
getZ
public float getZ()
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