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451Confusion Matrix Fundamentals
452Accuracy: When It Works and When It Fails
453Precision: Measuring Positive Prediction Quality
454Recall (Sensitivity): Measuring Positive Detection Rate
455Specificity and True Negative Rate
456F1 Score: Harmonic Mean of Precision and Recall
457F-Beta Score: Weighted Precision-Recall Trade-off
458Class-Specific vs Macro vs Micro Averaging
459Weighted Averaging for Imbalanced Classes
460ROC Curve: Visualizing Classifier Performance
461AUC-ROC: Area Under the ROC Curve
462Precision-Recall Curve for Imbalanced Data
463Average Precision and AUC-PR
464Cohen's Kappa: Agreement Beyond Chance
465Matthews Correlation Coefficient
466Log Loss (Cross-Entropy Loss)
467Brier Score for Probability Calibration
468Choosing Metrics Based on Cost Functions
469Mean Absolute Error (MAE)
470Mean Squared Error (MSE) and RMSE
471R² Score (Coefficient of Determination)
472Adjusted R² for Model Comparison
473Mean Absolute Percentage Error (MAPE)
474Huber Loss and Robust Metrics
475Median Absolute Error
476Quantile Loss for Probabilistic Predictions
477Residual Analysis and Diagnostic Plots
478Domain-Specific Metrics and Business Objectives
479Ranking Problems vs Classification Problems
480Receiver Operating Characteristic (ROC) Curve
481Area Under ROC Curve (AUC-ROC)
482Precision-Recall Curve
483Area Under Precision-Recall Curve (AP)
484Brier Score for Probabilistic Calibration
485Log Loss (Cross-Entropy)
486Mean Average Precision at K (MAP@K)
487Normalized Discounted Cumulative Gain (NDCG)
488Mean Reciprocal Rank (MRR)
489Calibration Plots and Reliability Diagrams
490Expected Calibration Error (ECE)

451Confusion Matrix Fundamentals
452Accuracy: When It Works and When It Fails
453Precision: Measuring Positive Prediction Quality
454Recall (Sensitivity): Measuring Positive Detection Rate
455Specificity and True Negative Rate
456F1 Score: Harmonic Mean of Precision and Recall
457F-Beta Score: Weighted Precision-Recall Trade-off
458Class-Specific vs Macro vs Micro Averaging
459Weighted Averaging for Imbalanced Classes
460ROC Curve: Visualizing Classifier Performance
461AUC-ROC: Area Under the ROC Curve
462Precision-Recall Curve for Imbalanced Data
463Average Precision and AUC-PR
464Cohen's Kappa: Agreement Beyond Chance
465Matthews Correlation Coefficient
466Log Loss (Cross-Entropy Loss)
467Brier Score for Probability Calibration
468Choosing Metrics Based on Cost Functions
469Mean Absolute Error (MAE)
470Mean Squared Error (MSE) and RMSE
471R² Score (Coefficient of Determination)
472Adjusted R² for Model Comparison
473Mean Absolute Percentage Error (MAPE)
474Huber Loss and Robust Metrics
475Median Absolute Error
476Quantile Loss for Probabilistic Predictions
477Residual Analysis and Diagnostic Plots
478Domain-Specific Metrics and Business Objectives
479Ranking Problems vs Classification Problems
480Receiver Operating Characteristic (ROC) Curve
481Area Under ROC Curve (AUC-ROC)
482Precision-Recall Curve
483Area Under Precision-Recall Curve (AP)
484Brier Score for Probabilistic Calibration
485Log Loss (Cross-Entropy)
486Mean Average Precision at K (MAP@K)
487Normalized Discounted Cumulative Gain (NDCG)
488Mean Reciprocal Rank (MRR)
489Calibration Plots and Reliability Diagrams
490Expected Calibration Error (ECE)

Lesson 471 of 3,538·11. Model Evaluation MetricsPro lesson

R² Score (Coefficient of Determination)

Master R² as the proportion of variance explained by the model, its range from negative infinity to 1, and interpretation pitfalls.

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