Function polars_lazy::dsl::functions::cum_fold_exprs
source · pub fn cum_fold_exprs<F, E>(
acc: Expr,
f: F,
exprs: E,
include_init: bool
) -> Exprwhere
F: 'static + Fn(Series, Series) -> Result<Option<Series>, PolarsError> + Send + Sync + Clone,
E: AsRef<[Expr]>,
Available on crate feature
dtype-struct
only.Expand description
Accumulate over multiple columns horizontally / row wise.