dask.dataframe.rolling.Rolling.mean

Rolling.mean()[source]

Calculate the rolling mean.

This docstring was copied from pandas.core.window.rolling.Rolling.mean.

Some inconsistencies with the Dask version may exist.

Parameters
*args

For NumPy compatibility and will not have an effect on the result.

enginestr, default None (Not supported in Dask)
  • 'cython' : Runs the operation through C-extensions from cython.

  • 'numba' : Runs the operation through JIT compiled code from numba.

  • None : Defaults to 'cython' or globally setting compute.use_numba

    New in version 1.3.0.

engine_kwargsdict, default None (Not supported in Dask)
  • For 'cython' engine, there are no accepted engine_kwargs

  • For 'numba' engine, the engine can accept nopython, nogil and parallel dictionary keys. The values must either be True or False. The default engine_kwargs for the 'numba' engine is {'nopython': True, 'nogil': False, 'parallel': False}

    New in version 1.3.0.

**kwargs

For NumPy compatibility and will not have an effect on the result.

Returns
Series or DataFrame

Return type is the same as the original object.

See also

pandas.Series.rolling

Calling rolling with Series data.

pandas.DataFrame.rolling

Calling rolling with DataFrames.

pandas.Series.mean

Aggregating mean for Series.

pandas.DataFrame.mean

Aggregating mean for DataFrame.

Notes

See Numba engine and Numba (JIT compilation) for extended documentation and performance considerations for the Numba engine.

Examples

The below examples will show rolling mean calculations with window sizes of two and three, respectively.

>>> s = pd.Series([1, 2, 3, 4])  
>>> s.rolling(2).mean()  
0    NaN
1    1.5
2    2.5
3    3.5
dtype: float64
>>> s.rolling(3).mean()  
0    NaN
1    NaN
2    2.0
3    3.0
dtype: float64