Figure 4.
PCA of mean values for the 1900 absorbance values of FT-NIR spectra for the seven maturity levels of “Autumn Royal” grape: 11° (AR11), 12° (AR12), 13.3° (AR133), 13.8° (AR138), 14° (AR14), 16° (AR16), and 18° (AR18) Brix.
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