ca.pfv.spmf.patterns.itemset_array_integers_with_count

Class Itemset

java.lang.Object

ca.pfv.spmf.patterns.AbstractItemset

ca.pfv.spmf.patterns.AbstractOrderedItemset

ca.pfv.spmf.patterns.itemset_array_integers_with_count.Itemset

Direct Known Subclasses:

ItemsetPascal

public class Itemset
extends AbstractOrderedItemset

This class represents an itemset (a set of items) implemented as an array of integers with a variable to store the support count of the itemset.

Field Summary

Fields

Modifier and Type	Field and Description
int[]	itemset the array of items
int	support the support of this itemset

Constructor Summary

Constructors

Constructor and Description
Itemset() Constructor
Itemset(int item) Constructor
Itemset(int[] items) Constructor
Itemset(java.util.List<java.lang.Integer> itemset, int support) Constructor

Method Summary

Modifier and Type	Method and Description
Itemset	cloneItemSetMinusAnItemset(Itemset itemsetToNotKeep) Make a copy of this itemset but exclude a set of items
Itemset	cloneItemSetMinusOneItem(java.lang.Integer itemToRemove) Make a copy of this itemset but exclude a given item
java.lang.Integer	get(int position) Get the item at a given position in this itemset
int	getAbsoluteSupport() Get the support of this itemset
int[]	getItems() Get the items as array
void	increaseTransactionCount() Increase the support of this itemset by 1
Itemset	intersection(Itemset itemset2) This method return an itemset containing items that are included in this itemset and in a given itemset
void	setAbsoluteSupport(java.lang.Integer support) Set the support of this itemset
int	size() Get the size of this itemset

Methods inherited from class ca.pfv.spmf.patterns.AbstractOrderedItemset

allTheSameExceptLastItem, allTheSameExceptLastItemV2, contains, containsAll, getLastItem, getRelativeSupport, isEqualTo, isEqualTo, toString

Methods inherited from class ca.pfv.spmf.patterns.AbstractItemset

getRelativeSupportAsString, print

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

itemset

public int[] itemset

the array of items

support

public int support

the support of this itemset

Constructor Detail

Itemset

public Itemset()

Constructor

Itemset

public Itemset(int item)

Constructor

Parameters:

item - an item that should be added to the new itemset

Itemset

public Itemset(int[] items)

Constructor

Parameters:

items - an array of items that should be added to the new itemset

Itemset

public Itemset(java.util.List<java.lang.Integer> itemset,
               int support)

Constructor

Parameters:

items - a list of Integer representing items in the itemset

support - the support of the itemset

Method Detail

getItems

public int[] getItems()

Get the items as array

Returns:

the items

getAbsoluteSupport

public int getAbsoluteSupport()

Get the support of this itemset

Specified by:

getAbsoluteSupport in class AbstractOrderedItemset

Returns:

the support of this itemset

size

public int size()

Get the size of this itemset

Specified by:

size in class AbstractOrderedItemset

Returns:

the size of this itemset

get

public java.lang.Integer get(int position)

Get the item at a given position in this itemset

Specified by:

get in class AbstractOrderedItemset

Parameters:

position - the position of the item to be returned

Returns:

the item

setAbsoluteSupport

public void setAbsoluteSupport(java.lang.Integer support)

Set the support of this itemset

Parameters:

support - the support

increaseTransactionCount

public void increaseTransactionCount()

Increase the support of this itemset by 1

cloneItemSetMinusOneItem

public Itemset cloneItemSetMinusOneItem(java.lang.Integer itemToRemove)

Make a copy of this itemset but exclude a given item

Parameters:

itemToRemove - the given item

Returns:

the copy

cloneItemSetMinusAnItemset

public Itemset cloneItemSetMinusAnItemset(Itemset itemsetToNotKeep)

Make a copy of this itemset but exclude a set of items

Parameters:

itemsetToNotKeep - the set of items to be excluded

Returns:

the copy

intersection

public Itemset intersection(Itemset itemset2)

This method return an itemset containing items that are included in this itemset and in a given itemset

Parameters:

itemset2 - the given itemset

Returns:

the new itemset