Table 4
Statistical comparison of the performances with two simpler regression methods on the test set (the Horsehead pillar).
| Method | Max. error(a) | Mean error(a) | RMSE |
|---|---|---|---|
| dex | dex | dex | |
| XCO-factor | 3.31 | − 0.370 ± 0.011 | 0.57 |
| Random forest on CO isotopologues | 0.32 | + 0.020 ± 0.003 | 0.11 |
| Random forest on all lines | 0.26 | + 0.040 ± 0.002 | 0.09 |
| Method | Max. error(a) | Mean error(a) | RMSE |
| 10dex | 10dex | 10dex | |
| XCO-factor | ~2 × 103 | 0.426 | 3.71 |
| Random forest on CO isotopologues | 2.08 | 1.046 | 1.29 |
| Random forest on all lines | 1.82 | 1.096 | 1.23 |
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