From: Prediction model of the hardness of waterlogged archaeological wood based on NIR spectroscopy
Mathematical treatment | Calibration set | Validation set | Factors | |||||
---|---|---|---|---|---|---|---|---|
R2c | RMSEC | SEC | R2v | RMSECV | SECV | RPD | ||
– | 0.68 | 7.57 | 7.59 | 0.62 | 8.39 | 8.42 | 1.60 | 7 |
MSC | 0.70 | 7.42 | 7.44 | 0.62 | 8.32 | 8.35 | 1.61 | 7 |
SNV | 0.68 | 7.66 | 7.69 | 0.59 | 8.61 | 8.64 | 1.56 | 7 |
1st | 0.88 | 4.69 | 4.70 | 0.82 | 5.72 | 5.74 | 2.34 | 8 |
2nd | 0.88 | 4.76 | 4.77 | 0.81 | 5.87 | 5.89 | 2.29 | 5 |
1st + MSC | 0.93 | 3.55 | 3.56 | 0.84 | 5.40 | 5.42 | 2.48 | 9 |
1st + SNV | 0.94 | 3.33 | 3.34 | 0.85 | 5.30 | 5.32 | 2.53 | 10 |
2nd + MSC | 0.82 | 5.74 | 5.76 | 0.80 | 6.13 | 6.15 | 2.19 | 2 |
2nd + SNV | 0.80 | 6.01 | 6.03 | 0.79 | 6.16 | 6.18 | 2.18 | 1 |