Application of Layered Coding Genetic Algorithm in Optimization of Unequal Area Production Facilities Layout

Algorithm 4

Mutation operation.

	Input: f_popu, n_f
	Output: f_popu after mutation operation
(1)	Pm ⟵ Mutation probability;
(2)	for i ⟵ 1 TO N_f
(3)	if Pm > random in [0,1];
(4)	f_popu_mu ⟵ f_popu(i,:);
(5)	r4 ⟵ unidrnd(N_f, 1, 2);
(6)	while r4(1) = = r4(2)
(7)	Do r4 ⟵ unidrnd(N_f, 1, 2);
(8)	end while
(9)	f_popu_mu(1, r4(1)) ⟵ f_popu(i, r4(2));
(10)	f_popu_mu(1, r4(2)) ⟵ f_popu(i, r4(1)); f_popu(i,:) ⟵ f_popu_mu;
(11)	end if
(12)	end for