org.lenskit.eval.crossfold

Class RetainNHistoryPartitionMethod

java.lang.Object

org.lenskit.eval.crossfold.RetainNHistoryPartitionMethod

All Implemented Interfaces:

HistoryPartitionMethod

public class RetainNHistoryPartitionMethod
extends java.lang.Object
implements HistoryPartitionMethod

Partition the event list by retaining a fixed number of elements.

Constructor Summary

Constructors

Constructor and Description
RetainNHistoryPartitionMethod(int n) Create a count partitioner.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object o)
int	hashCode()
int	partition(java.util.List<? extends Rating> data) Compute a partition of of the data.
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

RetainNHistoryPartitionMethod

public RetainNHistoryPartitionMethod(int n)

Create a count partitioner.

Parameters:

n - The number of items to put in the train partition.

Method Detail

partition

public int partition(java.util.List<? extends Rating> data)

Description copied from interface: HistoryPartitionMethod

Compute a partition of of the data.

Specified by:

partition in interface HistoryPartitionMethod

Parameters:

data - The data to partition.

Returns:

The index of the start of the second partition, containing the test data.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object