| Calibration dataset with fivefold validation | Calibration dataset | Validation dataset | Entire dataset | ||
---|---|---|---|---|---|---|
Model 3 (with DAS and SLW) | Without feature reduction | R2 | 0.87 | 0.88 | 0.92 | 0.90 |
RMSE | 54.40 | 51.56 | 45.61 | 49.59 | ||
RPD | 2.77 | 2.93 | 3.56 | 3.09 | ||
With feature ‘Hue’ reduction | R2 | 0.87 | 0.88 | 0.92 | 0.90 | |
RMSE | 54.29 | 51.46 | 45.41 | 49.49 | ||
RPD | 2.78 | 2.93 | 3.58 | 3.10 |