xarray.Dataset.rolling_exp

Dataset.rolling_exp(window: Optional[Mapping[Hashable, int]] = None, window_type: str = 'span', **window_kwargs)

Exponentially-weighted moving window. Similar to EWM in pandas

Requires the optional Numbagg dependency.

Parameters
windowA single mapping from a dimension name to window value,

optional

dimstr

Name of the dimension to create the rolling exponential window along (e.g., time).

windowint

Size of the moving window. The type of this is specified in window_type

window_typestr, one of [‘span’, ‘com’, ‘halflife’, ‘alpha’],

default ‘span’

The format of the previously supplied window. Each is a simple numerical transformation of the others. Described in detail: https://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.ewm.html

**window_kwargsoptional

The keyword arguments form of window. One of window or window_kwargs must be provided.