# jax.numpy.nanmean#

jax.numpy.nanmean(a, axis=None, dtype=None, out=None, keepdims=False, where=None)[source]#

Compute the arithmetic mean along the specified axis, ignoring NaNs.

LAX-backend implementation of `numpy.nanmean()`.

Original docstring below.

Returns the average of the array elements. The average is taken over the flattened array by default, otherwise over the specified axis. float64 intermediate and return values are used for integer inputs.

For all-NaN slices, NaN is returned and a RuntimeWarning is raised.

Parameters:
• a (array_like) â€“ Array containing numbers whose mean is desired. If a is not an array, a conversion is attempted.

• axis ({int, tuple of int, None}, optional) â€“ Axis or axes along which the means are computed. The default is to compute the mean of the flattened array.

• dtype (data-type, optional) â€“ Type to use in computing the mean. For integer inputs, the default is float64; for inexact inputs, it is the same as the input dtype.

• keepdims (bool, optional) â€“

If this is set to True, the axes which are reduced are left in the result as dimensions with size one. With this option, the result will broadcast correctly against the original a.

If the value is anything but the default, then keepdims will be passed through to the mean or sum methods of sub-classes of ndarray. If the sub-classes methods does not implement keepdims any exceptions will be raised.

• where (array_like of bool, optional) â€“ Elements to include in the mean. See ~numpy.ufunc.reduce for details.

• out (None)

Returns:

m â€“ If out=None, returns a new array containing the mean values, otherwise a reference to the output array is returned. Nan is returned for slices that contain only NaNs.

Return type:

ndarray, see dtype parameter above