Application of Permutation Entropy in Feature Extraction for Near-Infrared Spectroscopy Noninvasive Blood Glucose Detection

Table 2

R and RMSEP of SVR model.

Method	R	RMSEC (%)
PE	0.9998	0.0346
EMD-SPA	0.9892	0.0670
SPA	0.9542	0.0846
FD	0.9293	0.1050
MI	0.8990	0.1522
Full spectra data	0.8188	0.2499