tf.contrib.metrics.streaming_dynamic_auc

Computes the apporixmate AUC by a Riemann sum with data-derived thresholds.

tf.contrib.metrics.streaming_dynamic_auc(
    labels, predictions, curve='ROC', metrics_collections=(),
    updates_collections=(), name=None, weights=None
)

USAGE NOTE: this approach requires storing all of the predictions and labels for a single evaluation in memory, so it may not be usable when the evaluation batch size and/or the number of evaluation steps is very large.

Computes the area under the ROC or PR curve using each prediction as a threshold. This has the advantage of being resilient to the distribution of predictions by aggregating across batches, accumulating labels and predictions and performing the final calculation using all of the concatenated values.

Args
labels	A Tensor of ground truth labels with the same shape as predictions and with values of 0 or 1 whose values are castable to int64.
predictions	A Tensor of predictions whose values are castable to float64. Will be flattened into a 1-D Tensor.
curve	The name of the curve for which to compute AUC, 'ROC' for the Receiving Operating Characteristic or 'PR' for the Precision-Recall curve.
metrics_collections	An optional iterable of collections that auc should be added to.
updates_collections	An optional iterable of collections that update_op should be added to.
name	An optional name for the variable_scope that contains the metric variables.
weights	A 'Tensor' of non-negative weights whose values are castable to float64. Will be flattened into a 1-D Tensor.

Returns
auc	A scalar Tensor containing the current area-under-curve value.
update_op	An operation that concatenates the input labels and predictions to the accumulated values.

Raises
ValueError	If labels and predictions have mismatched shapes or if curve isn't a recognized curve type.