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Table 3
Standard deviation of the differences, residual mean square, mean squared error, and coefficient of determination between the PCA-derived abundances of the training stars and those measured in the corresponding primaries.
| [X/H] | ntraining | n(PCs) | σ | RMS | RMSE | R2 |
|---|---|---|---|---|---|---|
| Fe | 16 | 14 | 0.04 | 0.03 | 0.00 | 0.99 |
| C | 15 | 13 | 0.03 | 0.03 | 0.00 | 0.99 |
| Na | 16 | 14 | 0.05 | 0.05 | 0.00 | 0.98 |
| Mg | 16 | 14 | 0.12 | 0.11 | 0.01 | 0.86 |
| Al | 13 | 11 | 0.05 | 0.05 | 0.00 | 0.93 |
| Si | 16 | 14 | 0.07 | 0.07 | 0.00 | 0.93 |
| Ca | 16 | 14 | 0.12 | 0.11 | 0.01 | 0.83 |
| ScII | 16 | 14 | 0.05 | 0.05 | 0.00 | 0.98 |
| TiI | 16 | 14 | 0.06 | 0.06 | 0.00 | 0.94 |
| V | 16 | 14 | 0.12 | 0.12 | 0.01 | 0.79 |
| CrI | 16 | 14 | 0.04 | 0.04 | 0.00 | 0.99 |
| Mn | 16 | 14 | 0.07 | 0.06 | 0.00 | 0.97 |
| Co | 16 | 14 | 0.02 | 0.02 | 0.00 | 0.99 |
| Ni | 16 | 14 | 0.05 | 0.05 | 0.00 | 0.97 |
| Zn | 16 | 14 | 0.09 | 0.08 | 0.01 | 0.96 |
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