BasicModelG (Lucene 9.12.2 core API)

java.lang.Object
- org.apache.lucene.search.similarities.BasicModel
- - org.apache.lucene.search.similarities.BasicModelG

```
public class BasicModelG
extends BasicModel
```
Geometric as limiting form of the Bose-Einstein model. The formula used in Lucene differs slightly from the one in the original paper: F is increased by 1 and N is increased by F.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Constructor Summary

Constructors
Constructor Description

BasicModelG()
Sole constructor: parameter-free

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Explanation`	`explain(BasicStats stats, double tfn, double aeTimes1pTfn)`	Returns an explanation for the score.
`double`	`score(BasicStats stats, double tfn, double aeTimes1pTfn)`	Returns the informative content score combined with the after effect, more specifically `informationContentScore * aeTimes1pTfn / (1 + tfn)`.
`String`	`toString()`	Subclasses must override this method to return the code of the basic model formula.

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

- Constructor Detail
  - BasicModelG
```
public BasicModelG()
```
    Sole constructor: parameter-free
- Method Detail
  - score
```
public final double score(BasicStats stats,
                          double tfn,
                          double aeTimes1pTfn)
```
    Description copied from class: BasicModel
    
    Returns the informative content score combined with the after effect, more specifically informationContentScore * aeTimes1pTfn / (1 + tfn). This function must be non-decreasing with tfn.
    
    Specified by:
    
    score in class BasicModel
  - explain
```
public Explanation explain(BasicStats stats,
                           double tfn,
                           double aeTimes1pTfn)
```
    Description copied from class: BasicModel
    
    Returns an explanation for the score. Subclasses must override this method.
    
    Specified by:
    
    explain in class BasicModel
  - toString
```
public String toString()
```
    Description copied from class: BasicModel
    
    Subclasses must override this method to return the code of the basic model formula. Refer to the original paper for the list.
    
    Specified by:
    
    toString in class BasicModel