Description: Weighted Average Recall (WAR) is a metric used in supervised learning to evaluate the performance of a classification model. This metric focuses on the model’s ability to recover relevant instances, considering the relative importance of each class in the dataset. Unlike simple recall, which calculates the true positive rate without accounting for class distribution, WAR assigns a weight to each class, allowing for a more balanced evaluation in situations where classes are unevenly represented. This is particularly relevant in classification problems with imbalanced datasets, where a model might achieve high overall accuracy but fail to identify the less represented classes. WAR is calculated by averaging the recall rates of each class, multiplied by their corresponding weight, providing a more comprehensive view of the model’s performance. This metric is essential to ensure that models are not only accurate but also fair and effective in identifying all classes, especially in critical applications such as fraud detection or medical diagnosis, where the consequences of overlooking a class can be significant.
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