Characterization of Biochar Properties Affected by Different Pyrolysis Temperatures Using Visible-Near-Infrared Spectroscopy

Table 5

Influence of the number of principal components (PCs) on the discrimination accuracy of biochar types using principal components—linear discriminant analysis (PC-LDA) models in calibration and prediction.

Number of PCs used in PC-LDA models	Discrimination accuracy of biochar types
	Calibration	Prediction
6	100%	90.5%
5	100%	88.1%
4	100%	95.2%
3	95.3%	90.5%
2	88%	88.1%