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[MRG] ENH: Geometric-SMOTE implementation #882

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[MRG] ENH: Geometric-SMOTE implementation #882

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Reference Issue

Fixes #881

What does this implement/fix? Explain your changes.

Implements the Geometric SMOTE, as described in Geometric SMOTE a geometrically enhanced drop-in replacement for SMOTE by Douzas and Bacao.

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lgtm-com bot commented Dec 18, 2021

This pull request introduces 1 alert when merging fa3ffe5 into f1abf75 - view on LGTM.com

new alerts:

  • 1 for Unused import

@joaopfonseca joaopfonseca changed the title [MRG] ENH: Geometric-SMOTE implementation [WIP] ENH: Geometric-SMOTE implementation Dec 18, 2021
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codecov bot commented Dec 18, 2021 •
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Codecov Report

Merging #882 (c9945c0) into master (f1abf75) will increase coverage by 0.04%.
The diff coverage is 98.90%.

Impacted file tree graph

@@            Coverage Diff             @@
##           master     #882      +/-   ##
==========================================
+ Coverage   97.21%   97.26%   +0.04%     
==========================================
  Files          96       98       +2     
  Lines        6253     6435     +182     
  Branches      712      733      +21     
==========================================
+ Hits         6079     6259     +180     
- Misses        103      104       +1     
- Partials       71       72       +1
Impacted Files Coverage Δ
imblearn/over_sampling/_smote/geometric.py 97.84% <97.84%> (ø)
imblearn/over_sampling/__init__.py 100.00% <100.00%> (ø)
imblearn/over_sampling/_smote/__init__.py 100.00% <100.00%> (ø)
...over_sampling/_smote/tests/test_geometric_smote.py 100.00% <100.00%> (ø)

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@joaopfonseca joaopfonseca force-pushed the geometric-smote branch 2 times, most recently from b8907f6 to a2fadcc Compare December 20, 2021 08:09
@joaopfonseca joaopfonseca changed the title [WIP] ENH: Geometric-SMOTE implementation [MRG] ENH: Geometric-SMOTE implementation Dec 20, 2021
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joaopfonseca commented Dec 20, 2021 •
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@glemaitre, @chkoar I believe this is ready for revision. Some of the tests are not passing but from my understanding they are not related to the modifications in this PR.

If I may add, I just noticed imbalanced-learn's SMOTE-based over-samplers are only implementing modifications to the data selection mechanism. Geometric-SMOTE is a modification to the data generation mechanism. I hope you find this implementation useful and appropriate.

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[ENH] Add Geometric-SMOTE to imbalanced-learn
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