人工智能与数据挖掘教学课件lect413

1、10/21/2021bupt-ai&dm110/21/2021bupt-ai&dm2indicates the certainty of this association rule.indicates the usefulness of an association rule. 10/21/2021bupt-ai&dm310/21/2021bupt-ai&dm410/21/2021bupt-ai&dm510/21/2021bupt-ai&dm610/21/2021bupt-ai&dm710/21/2021bupt-ai&dm810/21/2021bupt-ai&dm9transaction i

2、ditems bought2000a,b,c1000a,c4000a,d5000b,e,fcustomerbuys diapercustomerbuys bothcustomerbuys beer10/21/2021bupt-ai&dm10transaction id items bought2000a,b,c1000a,c4000a,d5000b,e,ffrequent itemset supporta75%b50%c50%a,c50%min. support 50%min. confidence 50%10/21/2021bupt-ai&dm1110/21/2021bupt-ai&dm12

3、tid items100 1 3 4200 2 3 5300 1 2 3 5400 2 5database ditemset sup.1223334153itemset sup.12233353scan dc1l1itemset1 21 31 52 32 53 5itemset sup1 211 321 512 322 533 52itemset sup1 322 322 533 52l2c2c2scan dc3l3itemset2 3 5scan ditemset sup2 3 5210/21/2021bupt-ai&dm1310/21/2021bupt-ai&dm1410/21/2021b

4、upt-ai&dm1510/21/2021bupt-ai&dm16min-support = 20%min-confidence =70%10/21/2021bupt-ai&dm17table 3.3 a subset of the credit card promotion databasemagazinewatchlife insurancecredit cardpromotionpromotionpromotioninsurancesexyesnononomaleyesyesyesnofemalenonononomaleyesyesyesyesmaleyesnoyesnofemaleno

5、nononofemaleyesnoyesyesmalenoyesnonomaleyesnononomaleyesyesyesnofemale10/21/2021bupt-ai&dm18table 3.4 single-item sets si ngl esi ngl e- -i tem setsi tem sets n um ber of i tem sn um ber of i tem s m agazi ne prom oti on = yes 7 w atch prom oti on = yes 4 w atch prom oti on = n o 6 li fe i nsurance

6、prom oti on = yes 5 li fe i nsurance prom oti on = n o 5 c redi t c ard i nsurance = n o 8 sex = m al e 6 sex = fem al e 4 min support = 410/21/2021bupt-ai&dm19table 3.5 two-item setstwo-item setsnumber of itemsmagazine promotion = yes & watch promotion = no4magazine promotion = yes & life insurance

7、 promotion = yes5magazine promotion = yes & credit card insurance = no5magazine promotion = yes & sex = male4watch promotion = no & life insurance promotion = no4watch promotion = no & credit card insurance = no5watch promotion = no & sex = male4life insurance promotion = no & credit card insurance = no5life insurance promotion = no & sex = male4credit card insurance = no & sex = male4credit card insurance = no & sex = female4frequent three-item sets:10/21/2021bupt-ai&dm2010/21/2021bupt-ai&dm2110/21/2021bupt-ai&dm2210/21/2021bupt-ai&dm2310/21/2021bupt-ai&dm2410/21/2021bupt-ai&dm25tid dat