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tf.keras.losses.MeanSquaredError

Computes the mean of squares of errors between labels and predictions.

Inherits From: Loss

Used in the notebooks

Used in the guide Used in the tutorials

loss = square(y_true - y_pred)

Standalone usage:

y_true = [[0., 1.], [0., 0.]]
y_pred = [[1., 1.], [1., 0.]]
# Using 'auto'/'sum_over_batch_size' reduction type.
mse = tf.keras.losses.MeanSquaredError()
mse(y_true, y_pred).numpy()
0.5
# Calling with 'sample_weight'.
mse(y_true, y_pred, sample_weight=[0.7, 0.3]).numpy()
0.25
# Using 'sum' reduction type.
mse = tf.keras.losses.MeanSquaredError(
    reduction=tf.keras.losses.Reduction.SUM)
mse(y_true, y_pred).numpy()
1.0
# Using 'none' reduction type.
mse = tf.keras.losses.MeanSquaredError(
    reduction=tf.keras.losses.Reduction.NONE)
mse(y_true, y_pred).numpy()
array([0.5, 0.5], dtype=float32)

Usage with the compile() API:

model.compile(optimizer='sgd', loss=tf.keras.losses.MeanSquaredError())

reduction Type of tf.keras.losses.Reduction to apply to loss. Default value is AUTO. AUTO indicates that the reduction option will be determined by the usage context. For almost all cases this defaults to SUM_OVER_BATCH_SIZE. When used with tf.distribute.Strategy, outside of built-in training loops such as tf.keras compile and fit, using AUTO or SUM_OVER_BATCH_SIZE will raise an error. Please see this custom training tutorial for more details.
name Optional name for the instance. Defaults to 'mean_squared_error'.

Methods

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