Table 3.
Statistical parameterd of the established PLS-R models for moisture content. CV denotes cross-validated models, whereas TV refers to test set validated regressions.
| Spectrometer | State of the Cheese | R2 (CV) | RMSECV/% | PC (CV) | R2 (TV) | RMSEP/% | Bias (TV) | PC (TV) | RPD |
|---|---|---|---|---|---|---|---|---|---|
| NIRFlex N-500 | Whole pieces | 0.9598 | 1.2239 | 3 | 0.9376 | 1.0960 | 0.0408 | 3 | 5.597 |
| Grated cheese | 0.9873 | 0.6868 | 3 | 0.9561 | 0.9337 | −0.1843 | 3 | 6.697 | |
| SCiO | Whole pieces | 0.9659 | 1.0407 | 2 | 0.9394 | 1.1357 | −0.3763 | 2 | 4.341 |
| Grated cheese | 0.9637 | 1.0400 | 2 | 0.9327 | 1.7147 | 0.1297 | 2 | 3.208 |
R2—Coefficient of determination; RMSECV—Root mean square error of cross validation; PC—Principle component; RMSEP—Root mean square error of prediction; RPD—Ratio of performance to deviation.