Open Access
Table A.2
Confusion matrix, precision, and recall for the direct selection method with undersampling (Sect. 5.4).
| Predicted class: | |||||||
|---|---|---|---|---|---|---|---|
| Confusion matrix: | Galaxy | QSOhighZ | QSOlowZ | Star | other | TOTAL | |
| True class: | Galaxy | 21622 | 41 | 793 | 807 | 6853 | 30116 |
| QSOhighZ | 1 | 362 | 13 | 5 | 1 | 382 | |
| QSOlowZ | 67 | 346 | 2598 | 18 | 225 | 3254 | |
| Star | 183999 | 32456 | 8528 | 5371001 | 1199 | 5597183 | |
| other | 113 | 2 | 18 | 0 | 301 | 434 | |
| TOTAL | 205802 | 33207 | 11950 | 5371831 | 8579 | 5631369 | |
| True class: | Precision: | Galaxy | QSOhighZ | QSOlowZ | Star | other | |
| Galaxy | 10.5% | 0.1% | 6.6% | 0.0% | 79.9% | ||
| QSOhighZ | 0.0% | 1.1% | 0.1% | 0.0% | 0.0% | ||
| QSOlowZ | 0.0% | 1.0% | 21.7% | 0.0% | 2.6% | ||
| Star | 89.4% | 97.7% | 71.4% | 100.0% | 14.0% | ||
| other | 0.1% | 0.0% | 0.2% | 0.0% | 3.5% | ||
| TOTAL | 100% | 100% | 100% | 100% | 100% | ||
| True class: | Recall: | Galaxy | QSOhighZ | QSOlowZ | Star | other | TOTAL |
| Galaxy | 71.8% | 0.1% | 2.6% | 2.7% | 22.8% | 100% | |
| QSOhighZ | 0.3% | 94.8% | 3.4% | 1.3% | 0.3% | 100% | |
| QSOlowZ | 2.1% | 10.6% | 79.8% | 0.6% | 6.9% | 100% | |
| Star | 3.3% | 0.6% | 0.2% | 96.0% | 0.0% | 100% | |
| other | 26.0% | 0.5% | 4.1% | 0.0% | 69.4% | 100% | |
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