xarray.DataArray.rolling_exp¶

DataArray.rolling_exp(window=None, window_type='span', **window_kwargs)

Exponentially-weighted moving window. Similar to EWM in pandas

Requires the optional Numbagg dependency.

Parameters
• window (A 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_type (str, 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_kwargs (optional) – The keyword arguments form of window. One of window or window_kwargs must be provided.