TABLE 2.

Statistics of accuracy (%) of various features of each sub-band before and after binary gray wolf optimization (BGWO).

BGWO	Feature	Sub-band
		SB1	SB2	SB3	SB4	SB5
Before	2dif	57.81	58.2	58.59	57.81	59.38
	2ndif	58.98	58.59	60.16	57.42	56.64
	HC	55.86	61.33	58.59	59.37	58.59
	HM	55.86	55.47	56.64	57.03	56.25
	Sampen	57.42	58.21	57.42	59.77	57.03
	Average	57.186	58.36	58.28	58.28	57.578
	Std	1.34	2.08	1.34	1.22	1.34
After	2dif	63.67	63.28	61.72	61.36	62.11
	2ndif	67.58	64.45	66.41	63.28	62.11
	HC	60.94	63.67	61.33	63.67	65.62
	HM	61.33	61.72	62.25	62.25	63.28
	Sampen	63.28	61.33	62.11	63.28	60.55
	Average	63.36	62.89	62.764	62.768	62.734
	Std	2.64	1.32	2.07	0.95	1.88

Bold values means the maximum accuracy of each sub-band.