Example usage for weka.associations AprioriItemSet generateRules

Introduction

In this page you can find the example usage for weka.associations AprioriItemSet generateRules.

Prototype

public ArrayList<Object>[] generateRules(double minConfidence,
        ArrayList<Hashtable<ItemSet, Integer>> hashtables, int numItemsInSet) 

Source Link

Document

Generates all rules for an item set.

Usage

From source file:cba.Apriori.java

License:Open Source License

/** 
 * Method that finds all association rules.
 *
 * @throws Exception if an attribute is numeric
 *//*from  w w w  .j a v  a2 s .  c o  m*/
private void findRulesQuickly() throws Exception {

    FastVector[] rules;

    // Build rules
    for (int j = 1; j < m_Ls.size(); j++) {
        FastVector currentItemSets = (FastVector) m_Ls.elementAt(j);
        Enumeration enumItemSets = currentItemSets.elements();
        while (enumItemSets.hasMoreElements()) {
            AprioriItemSet currentItemSet = (AprioriItemSet) enumItemSets.nextElement();
            //AprioriItemSet currentItemSet = new AprioriItemSet((ItemSet)enumItemSets.nextElement());
            rules = currentItemSet.generateRules(m_minMetric, m_hashtables, j + 1);
            for (int k = 0; k < rules[0].size(); k++) {
                m_allTheRules[0].addElement(rules[0].elementAt(k));
                m_allTheRules[1].addElement(rules[1].elementAt(k));
                m_allTheRules[2].addElement(rules[2].elementAt(k));
            }
        }
    }
}

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