pandas.core.window.Rolling.aggregate¶
-
Rolling.
aggregate
(arg, *args, **kwargs)[source]¶ Aggregate using one or more operations over the specified axis.
Parameters: func : function, string, dictionary, or list of string/functions
Function to use for aggregating the data. If a function, must either work when passed a Series/DataFrame or when passed to Series/DataFrame.apply. For a DataFrame, can pass a dict, if the keys are DataFrame column names.
Accepted combinations are:
- string function name.
- function.
- list of functions.
- dict of column names -> functions (or list of functions).
*args
Positional arguments to pass to func.
**kwargs
Keyword arguments to pass to func.
Returns: - aggregated : Series/DataFrame
Notes
agg is an alias for aggregate. Use the alias.
A passed user-defined-function will be passed a Series for evaluation.
Examples
>>> df = pd.DataFrame(np.random.randn(10, 3), columns=['A', 'B', 'C']) >>> df A B C 0 -2.385977 -0.102758 0.438822 1 -1.004295 0.905829 -0.954544 2 0.735167 -0.165272 -1.619346 3 -0.702657 -1.340923 -0.706334 4 -0.246845 0.211596 -0.901819 5 2.463718 3.157577 -1.380906 6 -1.142255 2.340594 -0.039875 7 1.396598 -1.647453 1.677227 8 -0.543425 1.761277 -0.220481 9 -0.640505 0.289374 -1.550670
>>> df.rolling(3).sum() A B C 0 NaN NaN NaN 1 NaN NaN NaN 2 -2.655105 0.637799 -2.135068 3 -0.971785 -0.600366 -3.280224 4 -0.214334 -1.294599 -3.227500 5 1.514216 2.028250 -2.989060 6 1.074618 5.709767 -2.322600 7 2.718061 3.850718 0.256446 8 -0.289082 2.454418 1.416871 9 0.212668 0.403198 -0.093924
>>> df.rolling(3).agg({'A':'sum', 'B':'min'}) A B 0 NaN NaN 1 NaN NaN 2 -2.655105 -0.165272 3 -0.971785 -1.340923 4 -0.214334 -1.340923 5 1.514216 -1.340923 6 1.074618 0.211596 7 2.718061 -1.647453 8 -0.289082 -1.647453 9 0.212668 -1.647453