Class AfterEffect

This class acts as the base class for the implementations of the first normalization of the informative content in the DFR framework. This component is also called the after effect and is defined by the formula Inf2 = 1 - Prob2, where Prob2 measures the information gain.

This is a Lucene.NET EXPERIMENTAL API, use at your own risk

Inheritance
System.Object
AfterEffect
AfterEffect.NoAfterEffect
AfterEffectB
AfterEffectL
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
Namespace: Lucene.Net.Search.Similarities
Assembly: Lucene.Net.dll
Syntax
public abstract class AfterEffect

Constructors

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AfterEffect()

Sole constructor. (For invocation by subclass constructors, typically implicit.)

Declaration
protected AfterEffect()

Methods

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Explain(BasicStats, Single)

Returns an explanation for the score.

Declaration
public abstract Explanation Explain(BasicStats stats, float tfn)
Parameters
Type Name Description
BasicStats stats
System.Single tfn
Returns
Type Description
Explanation
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Score(BasicStats, Single)

Returns the aftereffect score.

Declaration
public abstract float Score(BasicStats stats, float tfn)
Parameters
Type Name Description
BasicStats stats
System.Single tfn
Returns
Type Description
System.Single
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ToString()

Subclasses must override this method to return the code of the after effect formula. Refer to the original paper for the list.

Declaration
public abstract override string ToString()
Returns
Type Description
System.String
Overrides
System.Object.ToString()

See Also