Example usage for weka.associations ItemSet support

Introduction

In this page you can find the example usage for weka.associations ItemSet support.

Prototype

public int support() 

Source Link

Document

Outputs the support for an item set.

Usage

From source file:cba.RuleItem.java

License:Open Source License

/**
 * Constructs a new RuleItem if the support of the given rule is above the support threshold.
 * @param premise the premise//from  w  w  w. jav  a 2 s .c o m
 * @param consequence the consequence
 * @param instances the instances
 * @param genTime the time of generation of the current premise and consequence
 * @param minRuleCount the support threshold
 * @param m_midPoints the mid points of the intervals
 * @param m_priors the estimated priori probabilities (in a hashtable)
 * @return a RuleItem if its support is above the threshold, null otherwise
 */
public RuleItem generateRuleItem(ItemSet premise, ItemSet consequence, Instances instances, int genTime,
        int minRuleCount, double[] m_midPoints, Hashtable m_priors) {
    ItemSet rule = new ItemSet(instances.numInstances());
    rule.m_items = new int[(consequence.m_items).length];
    System.arraycopy(premise.m_items, 0, rule.m_items, 0, (premise.m_items).length);
    for (int k = 0; k < consequence.m_items.length; k++) {
        if (consequence.m_items[k] != -1)
            rule.m_items[k] = consequence.m_items[k];
    }
    for (int i = 0; i < instances.numInstances(); i++)
        rule.upDateCounter(instances.instance(i));
    int ruleSupport = rule.support();
    if (ruleSupport > minRuleCount) {
        RuleItem newRule = new RuleItem(premise, consequence, genTime, ruleSupport, m_midPoints, m_priors);
        return newRule;
    }
    return null;
}

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