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

Pseudocode 2

Pseudocode of calculating the support count.

SUPRule(rul, Idx): calculate the support count of a rule.

Input: rul indicates an association rule; Idx indicates the

       attribute indices of each attribute.

Output: SUP1, SUP2, and SUP3 indicate the support count of

     the antecedent, the consequent and the rule,

     respectively.

 𝑋 ← the antecedent of rul, 𝑌 ← the consequent of rul;

 SUP1 ← Call SUPItem(𝑋, Idx);

 SUP2 ← Call SUPItem(𝑌, Idx);

 SUP3 ← Call SUPItem(𝑋∪ 𝑌, Idx);

 return SUP1, SUP2, SUP3;

SUPItem(Iset, Idx): calculate the support count of an itemset.

Input: Iset indicates an itemset; Idx indicates the attribute

       indices of each attribute.

Output: the support count of Iset.

  same ← Φ;

  for each item 𝑎∈ Iset in Iset

   same ← same ∩ Idx(𝑎);

  end for

  num ←|same|;

  return num;