tf.contrib.metrics.auc_using_histogram( boolean_labels, scores, score_range, nbins=100, collections=None, check_shape=True, name=None )
AUC computed by maintaining histograms.
Rather than computing AUC directly, this Op maintains Variables containing
histograms of the scores associated with
False labels. By
comparing these the AUC is generated, with some discretization error.
See: "Efficient AUC Learning Curve Calculation" by Bouckaert.
This AUC Op updates in
O(batch_size + nbins) time and works well even with
large class imbalance. The accuracy is limited by discretization error due
to finite number of bins. If scores are concentrated in a fewer bins,
accuracy is lower. If this is a concern, we recommend trying different
numbers of bins and comparing results.
boolean_labels: 1-D boolean
Tensor. Entry is
Trueif the corresponding record is in class.
scores: 1-D numeric
Tensor, same shape as boolean_labels.
, same dtype as
scores. The min/max values of score that we expect. Scores outside range will be clipped.
nbins: Integer number of bins to use. Accuracy strictly increases as the number of bins increases.
collections: List of graph collections keys. Internal histogram Variables are added to these collections. Defaults to
check_shape: Boolean. If
True, do a runtime shape check on the scores and labels.
name: A name for this Op. Defaults to "auc_using_histogram".
Tensor. Fetching this converts internal histograms to auc value.
Op, when run, updates internal histograms.