Pairwise Ranking Selector #138
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Pull request overview
This PR introduces three new algorithm selection methods based on pairwise ranking: APPS (Automatic Parallel Portfolio Selector), HARRIS (Hybrid Ranking and Regression Forests), and RPC (Ranking by Pairwise Comparison). These selectors expand the library's capabilities for algorithm portfolio selection and ranking-based approaches.
Key Changes:
- Implementation of three novel selector classes with distinct selection strategies
- Comprehensive test coverage for all three selectors with parametrized tests
- Four example scripts demonstrating practical usage and evaluation scenarios
Reviewed changes
Copilot reviewed 9 out of 9 changed files in this pull request and generated 9 comments.
Show a summary per file
| File | Description |
|---|---|
asf/selectors/parallel_portfolio_selector.py |
Implements APPS selector using bootstrap ensembles and Gaussian distribution overlap for parallel portfolio selection |
asf/selectors/hybrid_decision_tree.py |
Implements HARRIS selector combining regression and ranking losses in decision tree ensembles |
asf/selectors/rpc_selector.py |
Implements RPC selector using pairwise binary classification and Copeland scoring |
asf/selectors/__init__.py |
Exports the three new selector classes for public API |
test/selectors/test_selectors.py |
Adds comprehensive tests for all three selectors including edge cases and parameter variations |
examples/selection/17_parallel_portfolio.py |
Demonstrates APPS usage with synthetic data and various p_intersection values |
examples/selection/18_harris_selector.py |
Shows HARRIS functionality with different lambda parameters |
examples/selection/19_rpc_selector.py |
Illustrates RPC for both single selection and parallel portfolios |
examples/selection/20_apps_aslib_eval.py |
Provides cross-validation evaluation of APPS on ASlib benchmarks |
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Codecov Report❌ Patch coverage is @@ Coverage Diff @@
## main #138 +/- ##
==========================================
+ Coverage 84.22% 84.79% +0.56%
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Files 87 90 +3
Lines 6943 7281 +338
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+ Hits 5848 6174 +326
- Misses 1095 1107 +12
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