data : array-like
Input data, as a sequence or (subclass of) ndarray.
Masked arrays and TimeSeries objects are also accepted.
The input array should be 1D or 2D at most.
If the input array is 2D, the function is applied on each column.
span : int
Time periods. The smoothing factor is 2/(span + 1)
tol : {1e-6, float}, optional
Tolerance for the definition of the mask. When data contains masked
values, this parameter determines what points in the result should be
masked. Values in the result that would not be “significantly”
impacted (as determined by this parameter) by the masked values are
left unmasked.
dtype : dtype, optional
Data type of the result.
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