aif360.sklearn.metrics
.smoothed_base_rate¶
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aif360.sklearn.metrics.
smoothed_base_rate
(y_true, y_pred=None, *, concentration=1.0, pos_label=1, sample_weight=None)[source]¶ Compute the smoothed base rate, \(\frac{P + \alpha}{P + N + |R_Y|\alpha}\).
Parameters: - y_true (array-like) – Ground truth (correct) target values.
- y_pred (array-like, optional) – Estimated targets. Ignored.
- concentration (scalar) – Dirichlet smoothing concentration parameter \(|R_Y|\alpha\) (must be non-negative).
- pos_label (scalar, optional) – The label of the positive class.
- sample_weight (array-like, optional) – Sample weights.
Returns: float – Smoothed base rate.