Class Activity
Customer Date Items bought
Using SPADE algorithm, find sequence rules
C1 10 Milk, Jam, Sugar
that have more than 65% confidence.
C1 20 Bread, Cookies
C1 23 Bread
First step: Create Frequent Sequences
C2 11 Apple, Sugar, Cookies
C2 17 Milk
FREQUENT SEQUENCES
C2 21 Bread, Milk, Egg, Pasta
Frequent 1-Sequences
C2 28 Bread, Cookies
A 4
C3 14 Bread, Egg, Pasta
B 2
D 4
F 4
C3 25 Bread, Milk, Cookies
Frequent 2-Sequences
AB 3
AF 3
B->A 2
BF 4
D->A 2
D->B 2
D->F 2
F->A 2
Frequent 3-Sequences
ABF 3
BF->A 2
D->BF 2
D->B->A 2
D->F->A 2
Frequent 4-Sequences
D->BF->A 2