[Retracted] Advanced Cognitive Algorithm for Biomedical Data Processing: COVID-19 Pattern Recognition as a Case Study

Algorithm 1

The butterfly optimization algorithm (BOA).

	Input ⟵ Total number of iteration (Tmax), population size (N), objective function f(x), control parameter (a), switch probability (p), sensory modality (c), and the power exponent (a).
	Output ⟵ Optimal solution
(1)	Begin
(2)	For t = 1: Tmax
(3)	For i = 1: N
(4)	For j = 1: d
(5)	Update the fragrance of current search agent by Equation:
(6)	End for
(7)	End for
(8)	Find the best f
(9)	For i = 1: N
(10)	For j = 1: d
(11)	Set a random number r in [0,1]
(12)	If r < p, then
(13)	Move toward best position by Equations ,
(14)	Else
(15)	Move randomly using Equations ,
(16)	End if
(17)	End for
(18)	End for
(19)	Update the value of c and the power exponent a.
(20)	End for
(21)	End