tf.contrib.metrics.streaming_auc( predictions, labels, weights=None, num_thresholds=200, metrics_collections=None, updates_collections=None, curve='ROC', name=None )
See the guide: Metrics (contrib) > Metric
Computes the approximate AUC via a Riemann sum. (deprecated)
THIS FUNCTION IS DEPRECATED. It will be removed in a future version. Instructions for updating: Please switch to tf.metrics.auc. Note that the order of the labels and predictions arguments has been switched.
streaming_auc function creates four local variables,
false_negatives that are used to compute the AUC. To discretize the AUC curve, a linearly spaced set of thresholds is used to compute pairs of recall and precision values. The area under the ROC-curve is therefore computed using the height of the recall values by the false positive rate, while the area under the PR-curve is the computed using the height of the precision values by the recall.
This value is ultimately returned as
auc, an idempotent operation that computes the area under a discretized curve of precision versus recall values (computed using the aforementioned variables). The
num_thresholds variable controls the degree of discretization with larger numbers of thresholds more closely approximating the true AUC. The quality of the approximation may vary dramatically depending on
For best results,
predictions should be distributed approximately uniformly in the range [0, 1] and not peaked around 0 or 1. The quality of the AUC approximation may be poor if this is not the case.
For estimation of the metric over a stream of data, the function creates an
update_op operation that updates these variables and returns the
None, weights default to 1. Use weights of 0 to mask values.
predictions: A floating point
Tensorof arbitrary shape and whose values are in the range
Tensorwhose shape matches
Tensorwhose rank is either 0, or the same rank as
labels, and must be broadcastable to
labels(i.e., all dimensions must be either
1, or the same as the corresponding
num_thresholds: The number of thresholds to use when discretizing the roc curve.
metrics_collections: An optional list of collections that
aucshould be added to.
updates_collections: An optional list of collections that
update_opshould be added to.
curve: Specifies the name of the curve to be computed, 'ROC' [default] or 'PR' for the Precision-Recall-curve.
name: An optional variable_scope name.
auc: A scalar
Tensorrepresenting the current area-under-curve.
update_op: An operation that increments the
false_negativesvariables appropriately and whose value matches
labelshave mismatched shapes, or if
Noneand its shape doesn't match
predictions, or if either
updates_collectionsare not a list or tuple.
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Code samples licensed under the Apache 2.0 License.