Research Article
Multivariate Calibration and Model Integrity for Wood Chemistry Using Fourier Transform Infrared Spectroscopy
Figure 3
Coefficients by wavenumber for PCR and PLS for lignin prediction (a) when raw spectra were processed and (b) when a first-derivative pretreatment was processed. PC numbers 6, 2, 2, and 1 were chosen for PCR-raw, PLS-raw, PCR-derivative, and PLS derivative, respectively ().
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