polars.rolling_corr

polars.rolling_corr(a: str | Expr, b: str | Expr, *, window_size: int, min_periods: int | None = None, ddof: int = 1) → Expr

Compute the rolling correlation between two columns/ expressions.

Parameters:

a

Column name or Expression.

b

Column name or Expression.

window_size

The length of the window.

min_periods

The number of values in the window that should be non-null before computing a result. If None, it will be set equal to window size.

ddof

Delta degrees of freedom. The divisor used in calculations is N - ddof, where N represents the number of elements.