Description: Weighted F1 score is a metric used to evaluate the performance of supervised learning models, especially in contexts where classes are imbalanced. This measure combines precision and recall into a single value, providing a balance between both. Precision refers to the proportion of true positives over the total predicted positives, while recall measures the proportion of true positives over the total actual positive cases. The weighted F1 score takes into account the number of instances in each class, meaning that larger classes have a greater impact on the final result. This is crucial in applications where some classes are much more frequent than others, as it prevents the model from being biased towards the dominant classes. The weighted F1 score is particularly useful in multi-class classification problems, where a fair assessment of the model’s performance across all classes is sought, not just the most represented ones. In summary, this metric is essential for obtaining a more comprehensive view of a model’s effectiveness, allowing researchers and professionals to optimize their algorithms more effectively.
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