# tf.nn.sufficient_statistics

tf.nn.sufficient_statistics(
x,
axes,
shift=None,
keep_dims=False,
name=None
)


Defined in tensorflow/python/ops/nn_impl.py.

See the guide: Neural Network > Normalization

Calculate the sufficient statistics for the mean and variance of x.

These sufficient statistics are computed using the one pass algorithm on an input that's optionally shifted. See: https://en.wikipedia.org/wiki/Algorithms_for_calculating_variance#Computing_shifted_data

#### Args:

• x: A Tensor.
• axes: Array of ints. Axes along which to compute mean and variance.
• shift: A Tensor containing the value by which to shift the data for numerical stability, or None if no shift is to be performed. A shift close to the true mean provides the most numerically stable results.
• keep_dims: produce statistics with the same dimensionality as the input.
• name: Name used to scope the operations that compute the sufficient stats.

#### Returns:

Four Tensor objects of the same type as x:

• the count (number of elements to average over).
• the (possibly shifted) sum of the elements in the array.
• the (possibly shifted) sum of squares of the elements in the array.
• the shift by which the mean must be corrected or None if shift is None.