ca.pfv.spmf.algorithms.frequentpatterns.estDec

Class Algo_estDec

java.lang.Object

ca.pfv.spmf.algorithms.frequentpatterns.estDec.Algo_estDec

public class Algo_estDec
extends java.lang.Object

This is an implementation of the estDec algorithm (J. Chang, W.S. Lee 2006).

This implementation was made by Azadeh Soltani

Copyright (c) 2008-2012 Azadeh Soltani, Philippe Fournier-Viger

This file is part of the SPMF DATA MINING SOFTWARE (http://www.philippe-fournier-viger.com/spmf).

SPMF is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

SPMF is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with SPMF. If not, see .

See Also:

estNode, estTree

Constructor Summary

Constructors

Constructor and Description
Algo_estDec(double mins) Constructor

Method Summary

Modifier and Type	Method and Description
void	performMining_saveResultToFile(java.lang.String outputPath) Mine recent frequent itemsets from the current tree and save the result to a file
java.util.Hashtable<java.util.List<java.lang.Integer>,java.lang.Double>	performMining_saveResultToMemory() Mine recent frequent itemsets from the current tree and save the result to memory
void	printStats() Print statistics about the algorithm execution to the console.
void	processTransaction(int[] transaction) Process a transaction (add it to the tree and update itemsets
void	processTransactionFromFile(java.lang.String input) Run the algorithm by loading the transactions from an input file.
void	setDecayRate(double b, double h) Set the decay rate

Methods inherited from class java.lang.Object

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

Constructor Detail

Algo_estDec

public Algo_estDec(double mins)

Constructor

Parameters:

mins - minimum support

Method Detail

processTransactionFromFile

public void processTransactionFromFile(java.lang.String input)
                                throws java.io.FileNotFoundException,
                                       java.io.IOException

Run the algorithm by loading the transactions from an input file.

Parameters:

input - the input file path

output - the output file path for saving the result

mins - the minsup threshold as a double value in [0, 1]

Throws:

java.io.FileNotFoundException - if error opening the input file

java.io.IOException - if error reading/writing files

performMining_saveResultToFile

public void performMining_saveResultToFile(java.lang.String outputPath)
                                    throws java.io.IOException

Mine recent frequent itemsets from the current tree and save the result to a file

Parameters:

outputPath - the output file path

Throws:

java.io.IOException

performMining_saveResultToMemory

public java.util.Hashtable<java.util.List<java.lang.Integer>,java.lang.Double> performMining_saveResultToMemory()
                                                                                                         throws java.io.IOException

Mine recent frequent itemsets from the current tree and save the result to memory

Parameters:

outputPath - the output file path

Returns:

Throws:

java.io.IOException

processTransaction

public void processTransaction(int[] transaction)

Process a transaction (add it to the tree and update itemsets

Parameters:

transaction - an array of integers

setDecayRate

public void setDecayRate(double b,
                         double h)

Set the decay rate

Parameters:

b - decay base

h - decay-base life

printStats

public void printStats()

Print statistics about the algorithm execution to the console.