Frequent Itemsets and Association rules Association Rules Computation Model -(2) The true cost of mining disk-resident data is usually the number of disk l/os In practice, association-rule algorithms read the data in passes - all baskets read in turn Thus, we measure the cost by the number of passes an algorithm takesFrequent Itemsets and Association Rules 17 Computation Model – (2) ▪ The true cost of mining disk-resident data is usually the number of disk I/O’ s. ▪ In practice, association-rule algorithms read the data in passes – all baskets read in turn. ▪ Thus, we measure the cost by the number of passes an algorithm takes. Association Rules