Table 2.

Results of feature selection by the optimization algorithms.

Algorithm	Measurement indicator
	fitavg	Std	fitBest	fitworst
ChOA [22]	0.215	0.009	0.194	0.308
BBO [23]	0.597	0.034	0.351	0.640
LS [24]	0.085	0.009	0.041	0.062
WHO	0.037	0.005	0.039	0.051