Table 3.

Parameter setting.

Parameter	Value
k-value of KNN	5
Number of populations	20
Number of iterations	100
Problem dimensions	Number of features in the used dataset
Data search domain	[0 1]
Repetition of runs	25
No of babysitters in DMO	3
No of peep in DMO	2
α	1
τ	1
β	0.1
Pheromone in PSO	0.2
B constant in WOA	1
Initial value of chaotic	0.7
Iteration number in chaotic	500