COP 6726: New Directions in Database Systems

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Presentation transcript:

COP 6726: New Directions in Database Systems Eclat (Practice)

Input Assume that min_support = 3 Transaction Ordered Items 1 a, c, d, f, g, I, m, p 2 a, b, c, f, l, m, o 3 b, f, h, j, o 4 b, c, k, p, s 5 a, c, e, f, l, m, n, p

Input Assume that min_support = 3 Transaction Ordered Items 1 a, c, d, f, g, I, m, p 2 a, b, c, f, l, m, o 3 b, f, h, j, o 4 b, c, k, p, s 5 a, c, e, f, l, m, n, p Count 1-Item 4 c, f 3 a, m, p, b 2 l, o 1 d, g, I, h, j, k, s, e, n

Input Assume that min_support = 3 Transaction Ordered Items 1 a, c, d, f, g, I, m, p 2 a, b, c, f, l, m, o 3 b, f, h, j, o 4 b, c, k, p, s 5 a, c, e, f, l, m, n, p 1 2 3 4 5 a ○ b c f m p Count 1-Item 4 c, f 3 a, m, p, b

1-itemset Assume that min_support = 3 a:3 b:3 c:4 f:4 m:3 p:3 1 2 3 4 5 a ○ b c f m p

1-itemset Assume that min_support = 3 a:3 b:3 c:4 f:4 m:3 p:3 1 2 3 4 ac:3 af:3 am:3 ap:2 bc:2 bf:1 bm:1 bp:1 cf:3 cm:3 cp:3 fm:3 fp:2 mp:2 1 2 3 4 5 a ○ b c f m p

2-itemset Assume that min_support = 3 a:3 b:3 c:4 f:4 m:3 p:3 1 2 3 4 ac:3 af:3 am:3 ap:2 bc:2 bf:1 bm:1 bp:1 cf:3 cm:3 cp:3 fm:3 fp:2 mp:2 acf:3 acm:3 afm:3 cfm:3 cfp:2 cmp:2 1 2 3 4 5 a ○ b c f m p

2-itemset Assume that min_support = 3 a:3 b:3 c:4 f:4 m:3 p:3 1 2 3 4 ac:3 af:3 am:3 ap:2 bc:2 bf:1 bm:1 bp:1 cf:3 cm:3 cp:3 fm:3 fp:2 mp:2 acf:3 acm:3 afm:3 cfm:3 cfp:2 cmp:2 acfm:3 1 2 3 4 5 a ○ b c f m p