sklearn.metrics.roc_auc_score¶
- sklearn.metrics.roc_auc_score(y_true, y_score)¶
Compute Area Under the Curve (AUC) from prediction scores
Note: this implementation is restricted to the binary classification task.
Parameters : y_true : array, shape = [n_samples]
True binary labels.
y_score : array, shape = [n_samples]
Target scores, can either be probability estimates of the positive class, confidence values, or binary decisions.
Returns : auc : float
See also
- average_precision_score
- Area under the precision-recall curve
- roc_curve
- Compute Receiver operating characteristic (ROC)
References
[R147] Wikipedia entry for the Receiver operating characteristic Examples
>>> import numpy as np >>> from sklearn.metrics import roc_auc_score >>> y_true = np.array([0, 0, 1, 1]) >>> y_scores = np.array([0.1, 0.4, 0.35, 0.8]) >>> roc_auc_score(y_true, y_scores) 0.75