国科大数据挖掘刘莹第二次作业

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1.Consider the data set shown in Table 1(min_sup = 60%, min_conf=70%). (a)Find all frequent itemsets using Apriori by treating each transaction ID as a market basket. (b)Use the results in part (a) to compute the confidence for the association rules {a, b}{c} and {c}{a, b}. Is confidence a symmetric measure? (c)List all of the strong association rules (with support s and confidence c) matching the following metarule(规则), where X is a variable representing customers, and itemi denotes variables representing items (e.g. “A”, “B”, etc.): Table 1. Example of market basket transactions. TID Items-bought T1 {A, D, B, C} T2 {D, A, C, E, B} T3 {A, B, E} T4 {A, B, D}

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