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

Pseudocode 7

Pseudocode of the mutate operator.

population  mutate(pop, 𝑝_𝑚)

Input: pop indicates the population; 𝑝_𝑚 indicates

       the probability of mutation.

Output: offspring indicates the offspring after mutatation.

 offspring ← Φ;

 for  ∀ chrom ∈ pop

  𝑟 ← generate a random;

  if  𝑟 < 𝑝_𝑚

   chrom2  ←  mut(chrom, 𝑝_𝑚);

   while  not isvalid(chrom2)

    chrom2  ←  mut(chrom, 𝑝_𝑚);

   end while

   offspring ← offspring ∪ chrom2;

  end if

 end for

 return  offspring;