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

Pseudocode 1

Pseudocode of creating the attribute index.

attrIdx(𝐷, 𝐼): create the attribute index of each attribute.

Input: 𝐷 indicates the transaction database; 𝐼 indicates

        the universal itemset, namely 𝐼 contains all attributes.

Output: The attribute indices of the each attribute in 𝐼.

 for  each attribute 𝑖 in the universal itemset 𝐼

  Idx(𝑖) ←Φ;

 end for

 for  each transaction𝑇in database 𝐷

  define 𝑇 as𝑘;

  for  each attribute 𝑖 in the universal itemset 𝐼

   if  𝑖∈𝑇

    Idx(𝑖) ← Idx(𝑖)  ∪  {𝑘};

   end if

  end for

 end for

 return  Idx;