δ-Tolerance Closed Frequent Itemsets. James Cheng,Yiping Ke,and Wilfred Ng ICDM ’ 06 報告者：林靜怡 2007/03/15. Introduction. Th e number of Frequent Itemsets mined is often too large Closed Frequent Itemsets and Maximal Frequent Itemsets δ -Tolerance CFIs. Introduction.
δ-Tolerance Closed Frequent Itemsets
James Cheng,Yiping Ke,and Wilfred Ng
mined is often too large
where Y is X’s smallest superset
that has the greatest frequency
(106+108+107)/3 = 107