Class imbalance ratio

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Definition

The class imbalance ratio test allows you to set a threshold on the ratio between the number of rows from the most common class and the least common class.

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Taxonomy

• Category: Integrity.
• Task types: Tabular classification, text classification.
• Availability: development.

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Why it matters

• Class imbalance can significantly impact the performance of predictive models.
• Measuring the class imbalance ratio helps select more appropriate evaluation metrics.
• Awareness of the extent of class imbalance guides the choice of model and data preprocessing techniques.
• While class imbalance is inherent to certain problems, it is important to continuously measure the class imbalance ratio to ensure that it does not go out of control.

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Related

• Dealing with class imbalance, part 1 and part 2.