Expanding

Expanding window operations for cumulative calculations.

Example

import pandasCore as pd

s = pd.Series([1, 2, 3, 4, 5])
s.expanding().mean()  # [1.0, 1.5, 2.0, 2.5, 3.0]
s.expanding().sum()   # [1, 3, 6, 10, 15]

Parameters

Parameter	Type	Default	Description
min_periods	int	1	Minimum observations needed
center	bool	False	Set labels at center
axis	int	0	Axis to expand on

Methods

Same aggregation methods as Rolling:

• count(), sum(), mean(), median()

• var(), std(), min(), max()

• corr(), cov(), skew(), kurt()

• apply(), agg(), quantile(), sem(), rank()