com.imsl.datamining

Class Itemsets

java.lang.Object

com.imsl.datamining.Itemsets

All Implemented Interfaces:

Serializable, Cloneable

public class Itemsets
extends Object
implements Serializable, Cloneable

Object containing a set of frequent items and the number of transactions examined to obtain the frequent item set.

See Also:

Example 1, Example 2, Serialized Form

Method Summary

Methods

Modifier and Type	Method and Description
int[]	getItemset(int i) Returns a particular itemset.
int[][]	getItemsetsMatrix() Returns the set of itemsets as an integer matrix.
int	getNumberOfItemsets() Returns the number of itemsets in this Itemsets.
int	getNumberOfTransactions() Returns an int indicating the number of transactions used to construct the itemsets.
double	getSupport(int i) Returns the support determined for a particular itemset.
void	print() Prints a standard representation of the members of this object.

Methods inherited from class java.lang.Object

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

Method Detail

getItemset

public int[] getItemset(int i)

Returns a particular itemset.

Parameters:

i - an int indicating which itemset to retrieve.

Returns:

an int array that contains the i^th itemset.

getItemsetsMatrix

public int[][] getItemsetsMatrix()

Returns the set of itemsets as an integer matrix.

Returns:

an int matrix of dimension k by j+1, where k is the number of frequent itemsets and j is the number of frequent items. The first j columns are binary indicators that identify the items in each set. The final column contains the support for the itemset.

getNumberOfItemsets

public int getNumberOfItemsets()

Returns the number of itemsets in this Itemsets.

Returns:

an int specifying the number of itemsets in this Itemsets.

getNumberOfTransactions

public int getNumberOfTransactions()

Returns an int indicating the number of transactions used to construct the itemsets.

Returns:

an int indicating the number of transactions used to construct the itemsets.

getSupport

public double getSupport(int i)

Returns the support determined for a particular itemset.

Parameters:

i - an int indicating which itemset to retrieve the support for.

Returns:

a double that specifies the support determined for the i^th itemset.

print

public void print()

Prints a standard representation of the members of this object.