Rolling.
count
The rolling count of any non-NaN observations inside the window.
Returned object type is determined by the caller of the rolling calculation.
See also
Series.rolling
Calling object with Series data.
DataFrame.rolling
Calling object with DataFrames.
DataFrame.count
Count of the full DataFrame.
Examples
>>> s = pd.Series([2, 3, np.nan, 10]) >>> s.rolling(2).count() 0 1.0 1 2.0 2 1.0 3 1.0 dtype: float64 >>> s.rolling(3).count() 0 1.0 1 2.0 2 2.0 3 2.0 dtype: float64 >>> s.rolling(4).count() 0 1.0 1 2.0 2 2.0 3 3.0 dtype: float64