Attribute Index and Uniform Design Based Multiobjective Association Rule Mining with Evolutionary Algorithm

Table 3

An example of crossover of variable length and positions.

(a) Before crossover

𝐶1	𝐴1	𝐴2	𝐴3	𝐴4	𝐴5	𝐴6	𝐴7	𝐴8	𝐴9	𝐴10
pos1		2		4			7	8		10
𝐶2	𝐵1	𝐵2	𝐵3	𝐵4	𝐵5	𝐵6	𝐵7	𝐵8	𝐵9	𝐵10
pos2	1		3	4		6		8

(b) After crossover

𝐶1	𝐴1	𝐵1	𝐴3	𝐵3	𝐴5	𝐴6	𝐵4	𝐵6	𝐴9	𝐵8
pos1		*		*			*	*		*
𝐶2	𝐴2	𝐵2	𝐴4	𝐴7	𝐵5	𝐴8	𝐵7	𝐴10	𝐵9	𝐵10
pos2	*		*	*		*		*