org.lenskit.eval.crossfold

Class CrossfoldMethods

java.lang.Object

org.lenskit.eval.crossfold.CrossfoldMethods

public final class CrossfoldMethods
extends java.lang.Object

Method Summary

Modifier and Type	Method and Description
static CrossfoldMethod	partitionEntities() Create a crossfold method that partitions ratings into disjoint partitions.
static CrossfoldMethod	partitionItems(HistoryPartitionMethod part) Create a crossfold method that splits items into disjoint partitions.
static CrossfoldMethod	partitionUsers(SortOrder order, HistoryPartitionMethod part) Create a crossfold method that splits users into disjoint partitions.
static CrossfoldMethod	sampleEntities(int size) Create a crossfold method that creates disjoint samples of entities into disjoint partitions.
static CrossfoldMethod	sampleItems(HistoryPartitionMethod part, int size) Create a crossfold method that splits items into disjoint samples.
static CrossfoldMethod	sampleUsers(SortOrder order, HistoryPartitionMethod part, int size) Create a crossfold method that splits users into disjoint samples.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

partitionUsers

public static CrossfoldMethod partitionUsers(SortOrder order,
                                             HistoryPartitionMethod part)

Create a crossfold method that splits users into disjoint partitions.

Parameters:

order - The ordering for user rating partitions.

part - the partition algorithm for user ratings.

Returns:

The crossfold method.

sampleUsers

public static CrossfoldMethod sampleUsers(SortOrder order,
                                          HistoryPartitionMethod part,
                                          int size)

Create a crossfold method that splits users into disjoint samples.

Parameters:

order - The ordering for user rating partitions.

part - the partition algorithm for user ratings.

size - The number of users per sample.

Returns:

The crossfold method.

partitionEntities

public static CrossfoldMethod partitionEntities()

Create a crossfold method that partitions ratings into disjoint partitions.

Returns:

The crossfold method.

sampleEntities

public static CrossfoldMethod sampleEntities(int size)

Create a crossfold method that creates disjoint samples of entities into disjoint partitions.

Returns:

The crossfold method.

partitionItems

public static CrossfoldMethod partitionItems(HistoryPartitionMethod part)

Create a crossfold method that splits items into disjoint partitions.

Parameters:

part - the partition algorithm for item ratings.

Returns:

The crossfold method.

sampleItems

public static CrossfoldMethod sampleItems(HistoryPartitionMethod part,
                                          int size)

Create a crossfold method that splits items into disjoint samples.

Parameters:

part - the partition algorithm for item ratings.

size - The number of items per sample.

Returns:

The crossfold method.