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Discussion on Class Imbalance Problem RRS feed

  • Question

  • What is Cost-sensitive learning method is the perspective of class imbalance.?
    How a Cost-sensitive learning method is good to solve class imbalance problems instead of sampling techniques.?
    Saturday, February 1, 2020 9:39 PM

All replies

  • Hi,

    Class imbalance occurs when the classes are not represented equally in a classification problem. Cost-Sensitive Learning is an approach that can be used to combat this class imbalance, where we introduce the weights of the classes into the cost function by giving higher weight to minority class and lower weight to majority class. In general, Cost-Sensitive Learning approach would be a preferred approach, but you may also consider other sampling techniques where necessary. Hope this helps. Thanks.

    Here are some useful references that you can check out:

    Practical tips for class imbalance in binary classification

    Weiss, Gary & McCarthy, Kate & Zabar, Bibi. (2007). Cost-Sensitive Learning vs. Sampling: Which is Best for Handling Unbalanced Classes with Unequal Error Costs?. 35-41.


    Regards,

    GiftA-MSFT.

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    Tuesday, February 4, 2020 11:56 PM
    Moderator