Table 1.

Optimization and results of the soft independent modeling of class analogy (SIMCA) model of Trichosanthis Fructus samples.

Sub-Models	Labels	PCs	Calibration Set		Prediction Set
			Nright/N0	CA%	Nright/N0	CA%
1	Hebei	6	19/20	95	9/10	90
2	Shanxi	4	19/20	95	10/10	100
3	Shandong	4	17/20	85	9/10	90
4	Henan	5	18/20	90	10/10	100
5	Prepared slice	5	20/20	100	10/10	100