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Feature Selection in Imbalanced Data

Author

Listed:
  • Firuz Kamalov

    (Canadian University of Dubai)

  • Fadi Thabtah

    (Manukau Institute of Technology)

  • Ho Hon Leung

    (UAE University)

Abstract

The traditional feature selection methods are not suitable for imbalanced data as they tend to be biased towards the majority class. This problem is particularly acute in the field of medical diagnostics and fraud detection where the class distribution is highly skewed. In this paper, we propose a novel filter approach using decision tree-based $$F_1$$ F 1 -score. The $$F_1$$ F 1 -score incorporates the accuracy with respect to the minority class data and hence is a good measure in the case of imbalanced data. In the proposed implementation, the $$F_1$$ F 1 -score is calculated based on a 1-dimensional decision tree classifier resulting in a fast and effective feature evaluation method. Numerical experiments confirm that the proposed method achieves robust dimensionality reduction and accuracy results. In addition, the low computational complexity of the algorithm makes it a practical choice for big data applications.

Suggested Citation

  • Firuz Kamalov & Fadi Thabtah & Ho Hon Leung, 2023. "Feature Selection in Imbalanced Data," Annals of Data Science, Springer, vol. 10(6), pages 1527-1541, December.
  • Handle: RePEc:spr:aodasc:v:10:y:2023:i:6:d:10.1007_s40745-021-00366-5
    DOI: 10.1007/s40745-021-00366-5
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    References listed on IDEAS

    as
    1. Firuz Kamalov & Fadi Thabtah, 2017. "A Feature Selection Method Based on Ranked Vector Scores of Features for Classification," Annals of Data Science, Springer, vol. 4(4), pages 483-502, December.
    2. Abdul Majeed, 2019. "Improving Time Complexity and Accuracy of the Machine Learning Algorithms Through Selection of Highly Weighted Top k Features from Complex Datasets," Annals of Data Science, Springer, vol. 6(4), pages 599-621, December.
    3. James M. Tien, 2017. "Internet of Things, Real-Time Decision Making, and Artificial Intelligence," Annals of Data Science, Springer, vol. 4(2), pages 149-178, June.
    4. Fadi Thabtah & Firuz Kamalov, 2017. "Phishing Detection: A Case Analysis on Classifiers with Rules Using Machine Learning," Journal of Information & Knowledge Management (JIKM), World Scientific Publishing Co. Pte. Ltd., vol. 16(04), pages 1-16, December.
    Full references (including those not matched with items on IDEAS)

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