Evaluation metrics and uncertainty · MLD-0980
R-squared
A regression score comparing residual squared error with a reference variation around the target mean.
Original reference page · detailed expansion pending. Original definitions, examples, notes and citations are preserved below. New examples are illustrative, not benchmark results.
Original example
Compare fit against a mean-prediction baseline.
Original caveat
Out-of-sample R² can be negative.
Context and aliases
Level: Intermediate. Stages: Evaluation · Research.
Tags: ML · DL · SLM · LLM.
Aliases: R² · coefficient of determination.
Related concepts
Concepts linking here
Original references
- scikit-learn: cross-validation ↗ · Reference link
- Google Machine Learning Glossary ↗ · Consulted
- scikit-learn: evaluation metrics ↗ · Reference link
- Original reference URL ↗