sem(self, ddof: 'int' = 1, *args, **kwargs)
A minimum of one period is required for the calculation.
Delta Degrees of Freedom. The divisor used in calculations is N - ddof
, where N
represents the number of elements.
For NumPy compatibility and will not have an effect on the result.
For NumPy compatibility and will not have an effect on the result.
Return type is the same as the original object with np.float64
dtype.
Calculate the rolling standard error of mean.
pandas.DataFrame.rolling
Calling rolling with DataFrames.
pandas.DataFrame.sem
Aggregating sem for DataFrame.
pandas.Series.rolling
Calling rolling with Series data.
pandas.Series.sem
Aggregating sem for Series.
>>> s = pd.Series([0, 1, 2, 3])See :
... s.rolling(2, min_periods=1).sem() 0 NaN 1 0.707107 2 0.707107 3 0.707107 dtype: float64
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