Parametric Rough Sets with Application to Granular Association Rule Mining

Table 1

A many-to-many entity-relationship system.

(a) Customer

CID	Name	Age	Gender	Married	Country	Income	NumCars
𝑐1	Ron	20–29	Male	No	USA	60 k–69 k	0-1
𝑐2	Michelle	20–29	Female	Yes	USA	80 k–89 k	0-1
𝑐3	Shun	20–29	Male	No	China	40 k–49 k	0-1
𝑐4	Yamago	30–39	Female	Yes	Japan	80 k–89 k	2
𝑐5	Wang	30–39	Male	Yes	China	90 k–99 k	2

(b) Product

PID	Name	Country	Category	Color	Price
𝑝1	Bread	Australia	Staple	Black	1–9
𝑝2	Diaper	China	Daily	White	1–9
𝑝3	Pork	China	Meat	Red	1–9
𝑝4	Beef	Australia	Meat	Red	10–19
𝑝5	Beer	France	Alcohol	Black	10–19
𝑝6	Wine	France	Alcohol	White	10–19

(c) Buys

CID⧵PID	𝑝1	𝑝2	𝑝3	𝑝4	𝑝5	𝑝6
𝑐1	1	1	0	1	1	0
𝑐2	1	0	0	1	0	1
𝑐3	0	1	0	0	1	1
𝑐4	0	1	0	1	1	0
𝑐5	1	0	0	1	1	1