Table 2.

Parameter setting of algorithms

Parameter	Value
K parameter for KNN classifier	5
$\propto$ parameter for fitness function	0.99
Number of search agents	10
Maximum number of iterations	100
a of BGWO	from 2 to 0
$\omega$ of BPSO	from 0.9 to 0.2
C1 and C2 parameters for velocity of BPSO	2.0