Table 10.

Classification accuracy of Dataset II with/without feature selection.

Features			DR	NDR	EMAi1	EMAi2	EMAi3	EMAd1	EMAd2	EMAd3
without selection	COS	Dimension	16	16	16	16	16	16	16	16
		1	61.00	26.00	73.17	98.67	65.00	61.17	69.67	85.00
		2	85.17	98.67	67.17	83.33	84.50	54.00	62.83	67.67
		3	90.33	91.83	10.00	37.17	89.33	27.33	58.50	79.50
		4	6.67	17.33	40.67	59.50	67.67	1.33	5.83	15.00
		5	46.17	58.17	30.83	23.83	27.50	23.33	55.50	40.67
		6	7.17	70.50	2.50	10.83	9.50	39.83	8.00	3.67
		Average	49.42	60.42	37.39	52.22	57.25	34.50	43.39	48.58
	COR	1	53.00	25.50	73.33	98.83	65.50	60.83	70.67	83.00
		2	85.17	98.83	67.67	83.83	83.83	54.33	63.17	68.67
		3	90.17	90.17	6.33	29.50	86.33	27.33	45.67	78.67
		4	5.17	14.83	43.67	58.17	67.67	0.83	4.50	11.50
		5	51.83	59.83	32.17	22.67	24.00	20.67	51.50	34.67
		6	12.00	69.17	4.17	13.17	11.33	50.33	9.67	3.67
		Average	49.56	59.72	37.89	51.03	56.44	35.72	40.86	46.69
with selection	COS	Dimension	13	16	7	13	8	7	11	12
		1	47.17	26.00	75.00	87.50	82.00	52.50	77.83	82.50
		2	92.00	98.67	67.17	84.33	90.17	53.00	66.00	79.33
		3	85.83	91.83	31.83	32.83	75.33	31.67	58.67	76.50
		4	31.67	17.33	16.50	71.33	43.00	1.50	30.50	20.00
		5	93.67	58.17	88.17	49.33	62.83	41.00	70.00	47.00
		6	76.33	70.50	19.67	29.50	59.67	43.67	47.17	62.00
		Average	71.11	60.42	49.72	59.14	68.83	37.22	58.36	61.22
	COR	Dimension	13	9	7	10	8	16	11	12
		1	41.00	51.00	73.33	92.17	85.83	60.83	74.00	79.50
		2	92.67	99.17	72.33	87.50	91.17	54.33	64.00	79.33
		3	86.67	98.67	24.17	60.50	59.33	27.33	44.83	76.67
		4	31.33	0.00	9.50	5.33	43.67	0.83	16.00	9.33
		5	93.17	30.33	81.83	43.33	65.33	20.67	69.00	42.17
		6	81.33	95.67	37.17	52.83	91.00	50.33	47.17	60.33
		Average	71.03	62.47	49.72	56.94	72.72	35.72	52.50	57.89

Note: 1, ethanol; 2, ethylene; 3, ammonia; 4, acetaldehyde; 5, acetone; 6, toluene.