net.librec.data.splitter

Class LOOCVDataSplitter

java.lang.Object

net.librec.conf.Configured

net.librec.data.splitter.AbstractDataSplitter

net.librec.data.splitter.LOOCVDataSplitter

All Implemented Interfaces:

Configurable, DataSplitter

public class LOOCVDataSplitter
extends AbstractDataSplitter

Leave one out Splitter
Leave random or the last one user/item out as test set and the rest treated
as the train set.

Author:

WangYuFeng and Liuxz

Nested Class Summary

Nested classes/interfaces inherited from interface net.librec.data.DataSplitter

DataSplitter.SplitterType

Field Summary

Fields inherited from class net.librec.data.splitter.AbstractDataSplitter

dataConvertor, LOG, testMatrix, trainMatrix, validationMatrix

Fields inherited from class net.librec.conf.Configured

conf, CONF_DATA_COLUMN_FORMAT, CONF_DATA_INPUT_PATH, CONF_DFS_DATA_DIR

Constructor Summary

Constructors

Constructor and Description
LOOCVDataSplitter() Empty constructor.
LOOCVDataSplitter(DataConvertor dataConvertor, Configuration conf) Initializes a newly created LOOCVDataSplitter object with convertor and configuration.

Method Summary

Methods

Modifier and Type	Method and Description
void	getLOOByItems() Split ratings into two parts where one rating per item is preserved as the test set and the remaining data as the training set.
void	getLooByItemsDate() Split ratings into two parts where the last item according to date is preserved as the test set and the remaining data as the training set.
void	getLOOByUser() Split ratings into two parts where one rating per user is preserved as the test set and the remaining data as the training set.
void	getLOOByUserDate() Split ratings into two parts where the last user according to date is preserved as the test set and the remaining data as the training set.
void	splitData() Split the data.

Methods inherited from class net.librec.data.splitter.AbstractDataSplitter

getTestData, getTrainData, getValidData, setDataConvertor

Methods inherited from class net.librec.conf.Configured

getConf, setConf

Methods inherited from class java.lang.Object

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

Constructor Detail

LOOCVDataSplitter

public LOOCVDataSplitter()

Empty constructor.

LOOCVDataSplitter

public LOOCVDataSplitter(DataConvertor dataConvertor,
                 Configuration conf)

Initializes a newly created LOOCVDataSplitter object with convertor and configuration.

Parameters:

dataConvertor - the convertor for the splitter.

conf - the configuration for the splitter.

Method Detail

splitData

public void splitData()
               throws LibrecException

Split the data.

Throws:

LibrecException - if error occurs

getLOOByUser

public void getLOOByUser()

Split ratings into two parts where one rating per user is preserved as the test set and the remaining data as the training set.

getLOOByUserDate

public void getLOOByUserDate()

Split ratings into two parts where the last user according to date is preserved as the test set and the remaining data as the training set.

getLOOByItems

public void getLOOByItems()

Split ratings into two parts where one rating per item is preserved as the test set and the remaining data as the training set.

getLooByItemsDate

public void getLooByItemsDate()

Split ratings into two parts where the last item according to date is preserved as the test set and the remaining data as the training set.