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tf.estimator.add_metrics

Creates a new tf.estimator.Estimator which has given metrics.

Aliases:

  • tf.compat.v1.estimator.add_metrics
  • tf.compat.v2.estimator.add_metrics
  • tf.estimator.add_metrics
tf.estimator.add_metrics(
    estimator,
    metric_fn
)

Defined in python/estimator/extenders.py.

Example:

  def my_auc(labels, predictions):
    auc_metric = tf.keras.metrics.AUC(name="my_auc")
    auc_metric.update_state(y_true=labels, y_pred=predictions['logistic'])
    return {'auc': auc_metric}

  estimator = tf.estimator.DNNClassifier(...)
  estimator = tf.estimator.add_metrics(estimator, my_auc)
  estimator.train(...)
  estimator.evaluate(...)

Example usage of custom metric which uses features:

  def my_auc(labels, predictions, features):
    auc_metric = tf.keras.metrics.AUC(name="my_auc")
    auc_metric.update_state(y_true=labels, y_pred=predictions['logistic'],
                            sample_weight=features['weight'])
    return {'auc': auc_metric}

  estimator = tf.estimator.DNNClassifier(...)
  estimator = tf.estimator.add_metrics(estimator, my_auc)
  estimator.train(...)
  estimator.evaluate(...)

Args:

  • estimator: A tf.estimator.Estimator object.
  • metric_fn: A function which should obey the following signature:
    • Args: can only have following four arguments in any order:
    • predictions: Predictions Tensor or dict of Tensor created by given estimator.
    • features: Input dict of Tensor objects created by input_fn which is given to estimator.evaluate as an argument.
    • labels: Labels Tensor or dict of Tensor created by input_fn which is given to estimator.evaluate as an argument.
    • config: config attribute of the estimator.
    • Returns: Dict of metric results keyed by name. Final metrics are a union of this and estimator's existing metrics. If there is a name conflict between this and estimators existing metrics, this will override the existing one. The values of the dict are the results of calling a metric function, namely a (metric_tensor, update_op) tuple.

Returns:

A new tf.estimator.Estimator which has a union of original metrics with given ones.