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Improvement of the Individual structure #45
Description
The Individual structure should be modified to facilitate future updates (regression, multi-class, etc.). Ideally, metric-specific substructures/enums should be created, encompassing the current individual.auc, individual.specificity, individual.sensitivity and individual.metrics with different subtypes (BinaryClassification, Regression, etc.), for example, in a single subfield individual.metrics.
This modification is also necessary to enable, among other things, the addition of a direction to the AUC, which is currently impossible (or would require a dirty code).
Activity
fix: improve determinism in ACO and Individual evaluate functions
fix: convert Individual.features from HashMap to BTreeMap for full de…
eprifti commentedon Mar 24, 2026
Partially addressed in commit 8200176
The most critical structural change has been made:
Done:
Individual.featuresconverted fromHashMap<usize, i8>toBTreeMap<usize, i8>compute_hash()(no longer needs BTreeMap conversion)Remaining (original issue scope):
Metrics { BinaryClassification { auc, sensitivity, specificity, ... }, Regression { spearman, mse, ... } }The metrics refactor is the remaining work — it's needed to enable regressions (#15) with Spearman correlation as a fitness function.
feat: refactor Individual metrics into ClassificationMetrics struct
eprifti commentedon Mar 24, 2026
Completed in PR #58. Individual metrics refactored into ClassificationMetrics struct. All 756 tests pass.