Table 6.
Confusion matrix of SIMCA based on each species PCA models using Savitzky-Golay 2^nd derivative preprocessed spectra.

Actual species	Larch	Red pine	Korean pine	Cedar	Cypress	Precision (%)
Predicted species
Larch	152	0	0	0	0	100.00
Red pine	0	139	1	0	0	99.29
Korean pine	2	0	135	0	0	98.54
Cedar	0	0	0	165	0	100.00
Cypress	0	0	0	0	139	100.00
Unclassified	37	52	41	33	32	-
Multi－classified	9	9	23	2	29	-
Total (ea)	200	200	200	200	200	-
Recall (%)	76.00	69.50	67.50	82.50	69.50	-
Accuracy (%)	73.00