Chemistry Combining Elemental Profile, Stable Isotopic Ratios, and Chemometrics for Fine Classification of a Chinese Herb Licorice (Glycyrrhiza uralensis Fisch.) from 37 Producing Area

Table 3

Classification of 37 GUF geographical origins by different multiclass classification systems.

Models	Training set errors rate (%)	Prediction set accuracy (%)	Cross validation accuracy (%)
OVR-PLSDA	79.0	77.6	78.6
OVO-PLSDA	87.7	86.6	86.0
ES-PLSDA	91.5	92.9	92.3
OVR-LS-SVM	62.5	78.4	77.8
OVO-LS-SVM	70.9	88.0	87.4
ES-LS-SVM	86.3	92.1	92.0

‘a’ represents MRMCCV for PLSDA and RMSECV for LS-SVM.