Mining Strong Association Rules in Transaction DBs
Measurement of rule strength in a transaction DB.
A ® B [support, confidence]
We are often interested in only strong associations, i.e.
support ³ min_sup and confidence ³ min_conf.
tire Ù auto_accessories ® auto_services [2%, 80%].
#_of_trans_containing_all_the_items_in A È B
#_of_trans_that_contain_both A and B