/** Clone function */
public Itemset clone() {
Itemset d = new Itemset(this.clas);
for (int i = 0; i < this.itemset.size(); i++) d.add((itemset.get(i)).clone());
d.clas = this.clas;
d.support = this.support;
d.supportRule = this.supportRule;
d.per = this.per;
d.hits = this.hits;
d.misses = this.misses;
return (d);
}
