Apriori algorithm-difference between A->B and B->A application rule

Question

what is the difference between A->B and B->A application rule..

if transaction database is like this ,

T1 Bread, Jelly, Butter

T2 Bread, Butter

T3 Bread, Butter, Milk

T4 Beer, Bread

T5 Beer, Milk

how to calculate support and confidence of bread->butter and butter->bread ..?

please help me guys..

Answer 1

which will calculate the Support factor and confidence factor for you. you can read more about that in here.