Expanding.
min
Calculate the expanding minimum.
Under Review.
Returned object type is determined by the caller of the expanding calculation.
See also
Series.expanding
Calling object with a Series.
DataFrame.expanding
Calling object with a DataFrame.
Series.min
Similar method for Series.
DataFrame.min
Similar method for DataFrame.
Examples
Performing a rolling minimum with a window size of 3.
>>> s = pd.Series([4, 3, 5, 2, 6]) >>> s.rolling(3).min() 0 NaN 1 NaN 2 3.0 3 2.0 4 2.0 dtype: float64