ca.pfv.spmf.datastructures.triangularmatrix

Class TriangularMatrix

java.lang.Object

ca.pfv.spmf.datastructures.triangularmatrix.TriangularMatrix

All Implemented Interfaces:

AbstractTriangularMatrix

public class TriangularMatrix
extends java.lang.Object
implements AbstractTriangularMatrix

This class is for creating a triangular matrix of integers represented by using arrays. All the elements in the matrix are initialized to zero and can be changed to other integer values. For example:

0: [0, 0, 0, 0]
1: [0, 0, 0]
2: [0, 0]
3: [0]

This structure is used by various data mining algorithms such as CHARM and ECLAT.

See Also:

AbstractTriangularMatrix, SparseTriangularMatrix, AlgoCharm_Bitset, AlgoEclat_Bitset, AlgoEclat

Constructor Summary

Constructors

Constructor and Description
TriangularMatrix(int elementCount) Constructor of a new triangular matrix.

Method Summary

Modifier and Type	Method and Description
int	getSupportForItems(int i, int j) Get the value stored at a given position
void	incrementCount(int i, int j) Increment the value at position i,j
static void	main(java.lang.String[] args) Main method for testing and debugging only!
void	setSupport(java.lang.Integer i, java.lang.Integer j, int support)
java.lang.String	toString() Return a reprensentation of the triangular matrix as a string.

Methods inherited from class java.lang.Object

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

Constructor Detail

TriangularMatrix

public TriangularMatrix(int elementCount)

Constructor of a new triangular matrix.

Parameters:

elementCount - the desired number of lines in the matrix.

Method Detail

main

public static void main(java.lang.String[] args)

Main method for testing and debugging only!

toString

public java.lang.String toString()

Description copied from interface: AbstractTriangularMatrix

Return a reprensentation of the triangular matrix as a string.

Specified by:

toString in interface AbstractTriangularMatrix

Overrides:

toString in class java.lang.Object

incrementCount

public void incrementCount(int i,
                           int j)

Description copied from interface: AbstractTriangularMatrix

Increment the value at position i,j

Specified by:

incrementCount in interface AbstractTriangularMatrix

Parameters:

i - a row id

j - a column id

getSupportForItems

public int getSupportForItems(int i,
                              int j)

Description copied from interface: AbstractTriangularMatrix

Get the value stored at a given position

Specified by:

getSupportForItems in interface AbstractTriangularMatrix

Parameters:

i - a row id

j - a column id

Returns:

the value.

setSupport

public void setSupport(java.lang.Integer i,
                       java.lang.Integer j,
                       int support)

Specified by:

setSupport in interface AbstractTriangularMatrix