also be a MaskedArray.

Parameters
----------
data : array
    Sorted input data to median function
result : Array or MaskedArray
    Result of median function.
axis : int
    Axis along which the median was computed.

Returns
-------
result : scalar or ndarray
    Median or NaN in axes which contained NaN in the input.  If the input
    was an array, NaN will be inserted in-place.  If a scalar, either the
    input itself or a scalar NaN.
r