Table 9.

Accuracy of different classifiers for six stimuli combinations (in %) using the best feature pairs.

best feature set	classifiers	NaCl 5 ml versus 10 ml	NaCl 5 ml versus H2SO4	NaCl 5 ml versus O3	NaCl 10 ml versus O3	NaCl 10 ml versus H2SO4	O3 versus H2SO4	average accuracy (%)
F4–F5 (IQR-variance)	LDA	56.61	62.61	82.53	81.57	69.24	85.09	72.94
	QDA	57.78	61.62	82.24	86.06	64.69	87.49	73.31
	Diaglinear	63.17	53.8	82.7	83.47	62.06	80.33	70.92
	Diagquadratic	60.34	58.43	82	86.08	73.19	81.98	73.67
	Mahalanobis	62.17	50.23	80.24	92.07	53.64	78.91	69.54
F4–F6 (IQR-average spectral power)	LDA	56.88	65.87	71.61	70.06	67.94	81.27	68.94
	QDA	57.82	57.01	73.89	81	65.19	78.48	68.9
	Diaglinear	63.19	54.59	68.67	78.16	64.92	71.39	66.82
	Diagquadratic	58.11	60.57	79.19	75.70	67.96	79.66	68.31
	Mahalanobis	62.61	52.99	62.72	79.62	58.08	60.84	63.20