Table 4 Universal PLS models for Capirona, Bolaina and Pashaco.

From: Classification of Amazonian fast-growing tree species and wood chemical determination by FTIR and multivariate analysis (PLS-DA, PLS)

Compound

Cellulose

Hemicellulose

Lignin

Region

FP

Full

FP

Full

FP

Full

LV

4

6

5

6

6

6

\({R}_{c}^{2}\)

0.89

0.91

0.78

0.83

0.78

0.84

RMSEC

3.06

2.75

2.14

1.86

0.93

0.78

\({R}_{p}^{2}\)

0.92

0.91

0.78

0.83

0.72

0.80

RMSEP

2.52

2.73

2.15

1.89

1.02

0.816

RPD

3.13

3.43

2.16

2.46

1.91

2.27

RMSEC/RMSEP

1.21

1.007

0.995

0.98

0.911

0.955

\({R}_{c}^{2}\)/\({R}_{p}^{2}\)

0.93

0.998

0.999

1.004

1.08

1.05

  1. FP fingerprint region (1800–850 cm−1), FULL full spectra region (3700–850 cm−1), LV latent variable, \({R}_{c}^{2}\) and \({R}_{p}^{2}\) coefficient of determination of calibration and prediction, respectively, RMSEC and RMSEP root mean squared error of calibration and prediction, respectively, RPD ratio of performance to deviation.
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