User Guide

• 1. Introduction
  • 1.1. API’s of imbalanced-learn samplers
  • 1.2. Problem statement regarding imbalanced data sets
• 2. Over-sampling
  • 2.1. A practical guide
    • 2.1.1. Naive random over-sampling
    • 2.1.2. From random over-sampling to SMOTE and ADASYN
    • 2.1.3. Ill-posed examples
    • 2.1.4. SMOTE variants
  • 2.2. Mathematical formulation
    • 2.2.1. Sample generation
    • 2.2.2. Multi-class management
• 3. Under-sampling
  • 3.1. Prototype generation
  • 3.2. Prototype selection
    • 3.2.1. Controlled under-sampling techniques
      • 3.2.1.1. Mathematical formulation
    • 3.2.2. Cleaning under-sampling techniques
      • 3.2.2.1. Tomek’s links
      • 3.2.2.2. Edited data set using nearest neighbours
      • 3.2.2.3. Condensed nearest neighbors and derived algorithms
      • 3.2.2.4. Instance hardness threshold
• 4. Combination of over- and under-sampling
• 5. Ensemble of samplers
  • 5.1. Classifier including inner balancing samplers
    • 5.1.1. Bagging classifier
    • 5.1.2. Forest of randomized trees
    • 5.1.3. Boosting
• 6. Miscellaneous samplers
  • 6.1. Custom samplers
  • 6.2. Custom generators
    • 6.2.1. TensorFlow generator
    • 6.2.2. Keras generator
• 7. Metrics
  • 7.1. Classification metrics
    • 7.1.1. Sensitivity and specificity metrics
    • 7.1.2. Additional metrics specific to imbalanced datasets
    • 7.1.3. Macro-Averaged Mean Absolute Error (MA-MAE)
    • 7.1.4. Summary of important metrics
  • 7.2. Pairwise metrics
    • 7.2.1. Value Difference Metric
• 8. Common pitfalls and recommended practices
  • 8.1. Data leakage
• 9. Dataset loading utilities
  • 9.1. Imbalanced datasets for benchmark
  • 9.2. Imbalanced generator
• 10. Developer guideline
  • 10.1. Developer utilities
    • 10.1.1. Validation Tools
    • 10.1.2. Deprecation
    • 10.1.3. Testing utilities
  • 10.2. Making a release
    • 10.2.1. Major release
    • 10.2.2. Bug fix release
• 11. References

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1. Introduction