Table 2.

Sensitivity and specificity for the test set obtained by PCA-LDA varying with the sample selection method (RS: random selection; KS: Kennard-Stone; MLM: Morais-Lima-Martin) applied in datasets 1–6

Dataset	Sample selection method	Sensitivity (%)	Specificity (%)
1	RS	69	88
	KS	69	98
	MLM	74	78
2	RS	79	63
	KS	79	80
	MLM	81	80
3	RS
	Class 1	83	87
	Class 2	79	89
	Class 3	89	100
	KS
	Class 1	94	97
	Class 2	100	92
	Class 3	84	100
	MLM
	Class 1	94	92
	Class 2	95	95
	Class 3	84	100
4	RS
	Class 1	96	100
	Class 2	100	100
	Class 3	85	98
	Class 4	88	95
	KS
	Class 1	100	100
	Class 2	100	100
	Class 3	90	98
	Class 4	88	97
	MLM
	Class 1	100	100
	Class 2	100	100
	Class 3	95	98
	Class 4	88	99
5	RS	94	88
	KS	94	95
	MLM	94	91
6	RS	70	70
	KS	72	84
	MLM	72	89