Interpreting calibration curves to determine which model is performing well can be done by assessing how close the curves are to the ideal calibration line (the diagonal line from bottom-left to top-right, y=x).
Here are some key observations you can make from calibration curves:
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Near the Diagonal Line (Ideal Calibration): If a model's calibration curve for a particular class closely follows the diagonal line (y=x), it indicates that the predicted probabilities are well-calibrated. In other words, when the curve is close to the diagonal, the model's predicted probabilities are reliable and reflect the true class distribution.
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Above the Diagonal Line: When the calibration curve is above the diagonal line, it suggests that the model is overconfident. This means that when the model predicts a high probability for a class, it's more likely to be correct, but it may also indicate that the model is less cautious in making predictions.
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Below the Diagonal Line: Conversely, when the calibratio