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 | ||
– | 0.74 | 6.83 | 6.85 | 0.70 | 7.39 | 7.41 | 1.82 | 7 |
MSC | 0.79 | 6.15 | 6.17 | 0.76 | 6.73 | 6.75 | 1.99 | 7 |
SNV | 0.74 | 6.80 | 6.82 | 0.68 | 7.73 | 7.76 | 1.73 | 7 |
1st | 0.91 | 4.07 | 4.08 | 0.85 | 5.19 | 5.21 | 2.58 | 7 |
2nd | 0.95 | 3.08 | 3.09 | 0.84 | 5.35 | 5.37 | 2.51 | 7 |
1st + MSC | 0.95 | 3.05 | 3.06 | 0.88 | 4.68 | 4.69 | 2.87 | 7 |
1st + SNV | 0.95 | 3.11 | 3.12 | 0.88 | 4.82 | 4.84 | 2.78 | 7 |
2nd + MSC | 0.93 | 3.46 | 3.47 | 0.85 | 5.23 | 5.24 | 2.57 | 5 |
2nd + SNV | 0.93 | 3.46 | 3.47 | 0.86 | 5.15 | 5.16 | 2.61 | 5 |