ca.pfv.spmf.algorithms.frequentpatterns.dci_closed_optimized

Class BitMatrix

java.lang.Object

ca.pfv.spmf.algorithms.frequentpatterns.dci_closed_optimized.BitMatrix

public class BitMatrix
extends java.lang.Object

This class represents a bix matrix as used by the optimized version of the DCI_Closed algorithm.

See Also:

AlgoDCI_Closed_Optimized

Method Summary

Modifier and Type	Method and Description
void	addTidForItem(java.lang.Integer item, int bit) Add a tid to the tidset of an item.
java.util.BitSet	getBitSetOf(java.lang.Integer i) Get the tidset of an item
int	getSupportOfItem(int i) Get the support of an item (not the first time)
int	getSupportOfItemFirstTime(int i) Get the support of an item (first time only)
java.lang.String	toString() Return a string representation of the bitmatrix

Methods inherited from class java.lang.Object

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

Method Detail

addTidForItem

public void addTidForItem(java.lang.Integer item,
                          int bit)

Add a tid to the tidset of an item.

Parameters:

item - the item

bit - the bit corresponding to the tid

getSupportOfItemFirstTime

public int getSupportOfItemFirstTime(int i)

Get the support of an item (first time only)

Parameters:

i - the item

Returns:

the support

getSupportOfItem

public int getSupportOfItem(int i)

Get the support of an item (not the first time)

Parameters:

i - the item

Returns:

the support

getBitSetOf

public java.util.BitSet getBitSetOf(java.lang.Integer i)

Get the tidset of an item

Parameters:

i - the item

Returns:

a bitset representing the tidset of the item

toString

public java.lang.String toString()

Return a string representation of the bitmatrix

Overrides:

toString in class java.lang.Object