ca.pfv.spmf.algorithms.frequentpatterns.two_phase

Class ItemsetTP

java.lang.Object

ca.pfv.spmf.algorithms.frequentpatterns.two_phase.ItemsetTP

public class ItemsetTP
extends java.lang.Object

This class represents an itemset (a set of items) with utility information found by the TWO-PHASE algorithm.

See Also:

AlgoTwoPhase

Constructor Summary

Constructors

Constructor and Description
ItemsetTP() Default constructor

Method Summary

Modifier and Type	Method and Description
void	addItem(java.lang.Integer value) Add an item to that itemset
java.lang.Integer	get(int index) Get the item at at a given position in that itemset
int	getAbsoluteSupport() Get the absolute support of that itemset
java.util.List<java.lang.Integer>	getItems() Get items from that itemset.
double	getRelativeSupport(int nbObject) Get the relative support of this itemset
java.lang.String	getRelativeSupportAsString(int nbObject) Get the relative support of this itemset
java.util.Set<java.lang.Integer>	getTIDset() Get the set of transactions ids containing this itemset
int	getUtility() Get the utility of this itemset.
void	incrementUtility(int increment) Increase the utility of this itemset by a given amount.
void	print() print this itemset to System.out.
void	setTIDset(java.util.Set<java.lang.Integer> listTransactionIds) Set the tidset of this itemset.
int	size() Get the number of items in this itemset
java.lang.String	toString() Get a string representation of this itemset

Methods inherited from class java.lang.Object

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

Constructor Detail

ItemsetTP

public ItemsetTP()

Default constructor

Method Detail

getRelativeSupport

public double getRelativeSupport(int nbObject)

Get the relative support of this itemset

Parameters:

nbObject - the number of transactions

Returns:

the support

getRelativeSupportAsString

public java.lang.String getRelativeSupportAsString(int nbObject)

Get the relative support of this itemset

Parameters:

nbObject - the number of transactions

Returns:

the support

getAbsoluteSupport

public int getAbsoluteSupport()

Get the absolute support of that itemset

Returns:

the absolute support (integer)

addItem

public void addItem(java.lang.Integer value)

Add an item to that itemset

Parameters:

value - the item to be added

getItems

public java.util.List<java.lang.Integer> getItems()

Get items from that itemset.

Returns:

a list of integers (items).

get

public java.lang.Integer get(int index)

Get the item at at a given position in that itemset

Parameters:

index - the position

Returns:

the item (Integer)

print

public void print()

print this itemset to System.out.

toString

public java.lang.String toString()

Get a string representation of this itemset

Overrides:

toString in class java.lang.Object

Returns:

a string

setTIDset

public void setTIDset(java.util.Set<java.lang.Integer> listTransactionIds)

Set the tidset of this itemset.

Parameters:

listTransactionIds - a set of tids as a Set

size

public int size()

Get the number of items in this itemset

Returns:

the item count (int)

getTIDset

public java.util.Set<java.lang.Integer> getTIDset()

Get the set of transactions ids containing this itemset

Returns:

a tidset as a Set

getUtility

public int getUtility()

Get the utility of this itemset.

Returns:

utility as an int

incrementUtility

public void incrementUtility(int increment)

Increase the utility of this itemset by a given amount.

Parameters:

increment - the amount.