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

Table 3

R and RMSEP of PLSR model.

Method	R	RMSEC (%)
PE	0.9897	0.0468
EMD-SPA	0.9688	0.0822
SPA	0.9321	0.1045
FD	0.9089	0.1276
MI	0.8880	0.1601
Full spectra data	0.8076	0.2519