Lambda (Jackrabbit Oak 1.71-SNAPSHOT API)

java.lang.Object
- org.apache.lucene.search.similarities.Lambda

Direct Known Subclasses:

LambdaDF, LambdaTTF
```
public abstract class Lambda
extends Object
```
The lambda (λ_w) parameter in information-based models.

See Also:

IBSimilarity

Constructor Summary

Constructors
Constructor Description

Lambda()
Sole constructor.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`abstract Explanation`	`explain(BasicStats stats)`	Explains the lambda parameter.
`abstract float`	`lambda(BasicStats stats)`	Computes the lambda parameter.
`abstract String`	`toString()`	Subclasses must override this method to return the code of the lambda formula.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - Lambda
```
public Lambda()
```
    Sole constructor. (For invocation by subclass constructors, typically implicit.)
- Method Detail
  - lambda
```
public abstract float lambda(BasicStats stats)
```
    Computes the lambda parameter.
  - explain
```
public abstract Explanation explain(BasicStats stats)
```
    Explains the lambda parameter.
  - toString
```
public abstract String toString()
```
    Subclasses must override this method to return the code of the lambda formula. Since the original paper is not very clear on this matter, and also uses the DFR naming scheme incorrectly, the codes here were chosen arbitrarily.
    
    Overrides:
    
    toString in class Object