tf.keras.metrics.Poisson

Computes the Poisson metric between y_true and y_pred.

Inherits From: MeanMetricWrapper, Mean, Metric

Formula:

metric = y_pred - y_true * log(y_pred)

name (Optional) string name of the metric instance.
dtype (Optional) data type of the metric result.

Examples:

Standalone usage:

m = keras.metrics.Poisson()
m.update_state([[0, 1], [0, 0]], [[1, 1], [0, 0]])
m.result()
0.49999997
m.reset_state()
m.update_state([[0, 1], [0, 0]], [[1, 1], [0, 0]],
               sample_weight=[1, 0])
m.result()
0.99999994

Usage with compile() API:

model.compile(optimizer='sgd',
              loss='mse',
              metrics=[keras.metrics.Poisson()])

dtype

variables

Methods

add_variable

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add_weight

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from_config

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get_config

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Return the serializable config of the metric.

reset_state

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Reset all of the metric state variables.

This function is called between epochs/steps, when a metric is evaluated during training.

result

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Compute the current metric value.

Returns
A scalar tensor, or a dictionary of scalar tensors.

stateless_reset_state

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stateless_result

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stateless_update_state

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update_state

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Accumulate statistics for the metric.

__call__

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Call self as a function.