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Data Mining Association Rules for Making Knowledgeable Decisions
Abstract
This chapter describes two techniques used to explore frequent large itemsets in the database. In the first technique called “closed directed graph approach,” the algorithm scans the database once making a count on possible 2-itemsets from which only the 2-itemsets with a minimum support are used to form the closed directed graph which explores possible frequent large itemsets in the database. In the second technique, dynamic hashing algorithm, large 3-itemsets are generated at an earlier stage which reduces the size of the transaction database after trimming and the cost of later iterations will be less. Furthermore the authors hope that these techniques help researchers not only to understand about generating frequent large itemsets, but also assist with the understanding of finding association rules among transactions within relational databases.
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