Introduction to Data Mining

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Lesson 6.5

Association Rules: An Example

 

Consider the following dataset D.

TID  Itemsets            |D| = 4.              

           Count (2,3) = 2.

           Support(2,3) = 2/4 = 0.5.

           Support(3 Þ 2) = support(2,3) = 0.5.

           Confidence(3 Þ 2) = support(2,3)/support(3)

                                        = 0.5/0.75 = 0.67
 T100  1 3 4
 T200  2 3 5
 T300  1 2 3 5
 T400  2 5

 

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