Prediction performance metrics28 days ago
1. Why use several prediction metrics? | 2. Example data | 3. Start by looking at the predictions | 4. Calculate individual metrics | 4.1 RMSE: overall error magnitude | [\mathrm | 4.2 Bias: systematic overprediction or underprediction | [\mathrm | 5. A particularly important distinction: r2() versus R2() | 5.1 Lowercase r2() | [r^2 | 5.2 Uppercase R2() | [R^2 | 5.3 Correlation is not agreement | 6. Compare several models at once | 7. Categories of prediction performance metrics | 8. Core metrics | 9. Extended metrics | 9.1 Extended metric reference | 10. Quantile predictions | 11. How should metrics be combined? | 12. Related and redundant metrics | [\mathrm | 13. Missing values and special cases | 14. Practical recommendations | 15. References | 16. Next steps