LogLikelihoodTransform (S-Space Package 2.0.1 API)

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java.lang.Object
- edu.ucla.sspace.matrix.BaseTransform
- - edu.ucla.sspace.matrix.LogLikelihoodTransform

All Implemented Interfaces:

Transform
```
public class LogLikelihoodTransform
extends BaseTransform
```
Transforms a matrix using the log-likelihood weight. The input matrix is assumed to have non-negative values and be formatted as rows representing terms and columns representing terms. Each matrix cell indicates the number of times the row's word occurs within the some range of the column's word. Although the log likelihood typically requires much more than this, an estimation is used that utilizes only the occurrence frequency counts based. See the following papers for details and analysis:

Association of Computational Linguistics

33

Author:: Keith Stevens

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

class LogLikelihoodTransform.LogLikelihoodGlobalTransform

Constructor Summary

Constructors
Constructor and Description

LogLikelihoodTransform()

Method Summary

Methods
Modifier and Type	Method and Description
`protected GlobalTransform`	`getTransform(File inputMatrixFile, MatrixIO.Format format)` Returns a `GlobalTransform` for a File of the given format.
`protected GlobalTransform`	`getTransform(Matrix matrix)` Returns a `GlobalTransform` for a `Matrix`.
`String`	`toString()` Returns the name of this transform.

Methods inherited from class edu.ucla.sspace.matrix.BaseTransform
transform, transform, transform, transform

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

- Constructor Detail
  - LogLikelihoodTransform
```
public LogLikelihoodTransform()
```
- Method Detail
  - getTransform
```
protected GlobalTransform getTransform(Matrix matrix)
```
    Returns a GlobalTransform for a Matrix.
    
    Specified by:
    
    getTransform in class BaseTransform
  - getTransform
```
protected GlobalTransform getTransform(File inputMatrixFile,
                           MatrixIO.Format format)
```
    Returns a GlobalTransform for a File of the given format.
    
    Specified by:
    
    getTransform in class BaseTransform
  - toString
```
public String toString()
```
    Returns the name of this transform.
    
    Overrides:
    
    toString in class Object

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