pandas.api.indexers.FixedForwardWindowIndexer¶
- class pandas.api.indexers.FixedForwardWindowIndexer(index_array=None, window_size=0, **kwargs)[source]¶
Creates window boundaries for fixed-length windows that include the current row.
Examples
>>> df = pd.DataFrame({'B': [0, 1, 2, np.nan, 4]}) >>> df B 0 0.0 1 1.0 2 2.0 3 NaN 4 4.0
>>> indexer = pd.api.indexers.FixedForwardWindowIndexer(window_size=2) >>> df.rolling(window=indexer, min_periods=1).sum() B 0 1.0 1 3.0 2 2.0 3 4.0 4 4.0
Methods
get_window_bounds([num_values, min_periods, ...])Computes the bounds of a window.