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 | ||
– | 0.91 | 4.09 | 4.10 | 0.89 | 4.45 | 4.47 | 3.01 | 8 |
MSC | 0.91 | 4.11 | 4.12 | 0.89 | 4.54 | 4.55 | 2.96 | 7 |
SNV | 0.91 | 4.00 | 4.02 | 0.89 | 4.56 | 4.58 | 2.94 | 8 |
1st | 0.92 | 3.70 | 3.72 | 0.89 | 4.51 | 4.52 | 2.98 | 6 |
2nd | 0.91 | 4.06 | 4.07 | 0.77 | 6.49 | 6.50 | 2.07 | 4 |
1st + MSC | 0.94 | 3.42 | 3.43 | 0.87 | 4.83 | 4.84 | 2.78 | 5 |
1st + SNV | 0.96 | 2.77 | 2.78 | 0.88 | 4.62 | 4.63 | 2.91 | 7 |
2nd + MSC | 0.88 | 4.74 | 4.75 | 0.71 | 7.29 | 7.31 | 1.84 | 3 |
2nd + SNV | 0.87 | 4.69 | 4.70 | 0.71 | 7.23 | 7.25 | 1.86 | 3 |