# pandas.core.window.Expanding.std¶

Calculate expanding standard deviation.

Normalized by N-1 by default. This can be changed using the ddof argument.

- param ddof
- int, default 1
Delta Degrees of Freedom. The divisor used in calculations is

`N - ddof`

, where`N`

represents the number of elements. *args, **kwargs For NumPy compatibility. No additional arguments are used.

- return
Series or DataFrame Returns the same object type as the caller of the expanding calculation.

Warning

This feature is currently unsupported by Intel Scalable Dataframe Compiler