Table 4 Prediction modeling results of nicotine content in cigars.

Target	Characteristic band selection	Model	Training sets			Test sets
Target	Characteristic band selection	Model	Rc²	RMSEC	RMSECV	Rp²	RMSEP	RPD
Nicotine	UVE	PLSR	0.749	0.095	0.080	0.673	0.101	1.690
		BP	0.762	0.081	0.079	0.744	0.088	1.930
		RF	0.882	0.086	0.067	0.681	0.097	1.648
		SVM	0.766	0.093	0.102	0.664	0.090	1.705
	CARS	PLSR	0.876	0.068	0.067	0.643	0.127	1.673
		BP	0.721	0.044	0.063	0.797	0.078	2.182
		RF	0.909	0.059	0.059	0.757	0.064	1.945
		SVM	0.797	0.087	0.087	0.784	0.078	1.977
	SPA	PLSR	0.723	0.090	0.100	0.671	0.097	1.636
		BP	0.767	0.094	0.088	0.546	0.117	1.459
		RF	0.888	0.065	0.057	0.749	0.085	1.895
		SVM	0.758	0.095	0.095	0.733	0.098	1.562

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