public abstract class Normalization extends Object
DFRSimilarity
Modifier and Type | Class and Description |
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static class |
Normalization.NoNormalization
Implementation used when there is no normalization.
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Constructor and Description |
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Normalization()
Sole constructor.
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Modifier and Type | Method and Description |
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Explanation |
explain(BasicStats stats,
float tf,
float len)
Returns an explanation for the normalized term frequency.
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abstract float |
tfn(BasicStats stats,
float tf,
float len)
Returns the normalized term frequency.
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abstract String |
toString()
Subclasses must override this method to return the code of the
normalization formula.
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public Normalization()
public abstract float tfn(BasicStats stats, float tf, float len)
len
- the field length.public Explanation explain(BasicStats stats, float tf, float len)
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.
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