pub fn rolling_var<T>(
values: &[T],
window_size: usize,
min_periods: usize,
center: bool,
weights: Option<&[f64]>,
params: Option<RollingFnParams>,
) -> PolarsResult<ArrayRef>
pub fn rolling_var<T>(
values: &[T],
window_size: usize,
min_periods: usize,
center: bool,
weights: Option<&[f64]>,
params: Option<RollingFnParams>,
) -> PolarsResult<ArrayRef>