InstanceList.StratifiedCrossValidationIterator (Mallet 2 API)

java.lang.Object
- cc.mallet.types.InstanceList.CrossValidationIterator
- - cc.mallet.types.InstanceList.StratifiedCrossValidationIterator

All Implemented Interfaces:

java.io.Serializable, java.util.Iterator<InstanceList[]>

Enclosing class:

InstanceList
```
public class InstanceList.StratifiedCrossValidationIterator
extends InstanceList.CrossValidationIterator
```
StratifiedCrossValidationIterator allows iterating over pairs of InstanceList, where each pair is split into training/testing based on nfolds, and each fold maintains the distribution properties of the original InstanceList as much as possible.
If the target alphabet of this InstanceList, which we split for cross validation, is null, then classic cross validation is used instead. TODO: Implement stratified split, even when the target alphabet is null.

Author:

George Valkanas (lebiathan@gmail.com)

See Also:

Serialized Form

- Constructor Summary
  
  Constructors
  Constructor Description
  
  StratifiedCrossValidationIterator(int numFolds)
  
  StratifiedCrossValidationIterator(int numFolds, int seed)
- Method Summary
  - Methods inherited from class cc.mallet.types.InstanceList.CrossValidationIterator
    hasNext, next, nextSplit, nextSplit, remove
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
  - Methods inherited from interface java.util.Iterator
    forEachRemaining

Constructor Detail

StratifiedCrossValidationIterator

public StratifiedCrossValidationIterator(int numFolds)

StratifiedCrossValidationIterator

public StratifiedCrossValidationIterator(int numFolds,
                                         int seed)