modin.pandas.Resampler.mean

Resampler.mean(numeric_only: bool = False, *args: Any, **kwargs: Any) → Union[DataFrame, Series][source]

Compute mean of resample bins.

Parameters:

  • numeric_only (bool, default False) – Include only float, int, boolean columns.

  • engine (str, default None) – This parameter is ignored in Snowpark pandas. The execution engine will always be Snowflake.

  • engine_kwargs (dict, default None) – This parameter is ignored in Snowpark pandas. The execution engine will always be Snowflake.

Returns:

Computed mean of values within each resample bin.

Return type:

Series or DataFrame

Examples

For Series:

>>> lst1 = pd.date_range('2020-01-01', periods=4, freq='1D')
>>> ser1 = pd.Series([1, 2, 3, 4], index=lst1)
>>> ser1
2020-01-01    1
2020-01-02    2
2020-01-03    3
2020-01-04    4
Freq: None, dtype: int64
Copy
>>> ser1.resample('2D').mean()
2020-01-01    1.5
2020-01-03    3.5
Freq: None, dtype: float64
Copy
>>> lst2 = pd.date_range('2020-01-01', periods=4, freq='S')
>>> ser2 = pd.Series([1, 2, np.nan, 4], index=lst2)
>>> ser2
2020-01-01 00:00:00    1.0
2020-01-01 00:00:01    2.0
2020-01-01 00:00:02    NaN
2020-01-01 00:00:03    4.0
Freq: None, dtype: float64
Copy
>>> ser2.resample('2S').mean()
2020-01-01 00:00:00    1.5
2020-01-01 00:00:02    4.0
Freq: None, dtype: float64
Copy

For DataFrame:

>>> df1 = pd.DataFrame(
... {'A': [1, 1, 2, 1, 2], 'B': [np.nan, 2, 3, 4, 5]},
... index=pd.date_range('2020-01-01', periods=5, freq='1D'))
>>> df1
            A    B
2020-01-01  1  NaN
2020-01-02  1  2.0
2020-01-03  2  3.0
2020-01-04  1  4.0
2020-01-05  2  5.0
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>>> df1.resample('2D').mean()
              A    B
2020-01-01  1.0  2.0
2020-01-03  1.5  3.5
2020-01-05  2.0  5.0
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>>> df1.resample('2D')['B'].mean()
2020-01-01    2.0
2020-01-03    3.5
2020-01-05    5.0
Freq: None, Name: B, dtype: float64
Copy
>>> df2 = pd.DataFrame(
... {'A': [1, 2, 3, np.nan], 'B': [np.nan, np.nan, 3, 4]},
... index=pd.date_range('2020-01-01', periods=4, freq='1S'))
>>> df2
                       A    B
2020-01-01 00:00:00  1.0  NaN
2020-01-01 00:00:01  2.0  NaN
2020-01-01 00:00:02  3.0  3.0
2020-01-01 00:00:03  NaN  4.0
Copy
>>> df2.resample('2S').mean()
                       A    B
2020-01-01 00:00:00  1.5  NaN
2020-01-01 00:00:02  3.0  3.5
Copy
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