polars.Expr.cumsum¶
- Expr.cumsum(reverse: bool = False) polars.internals.expr.Expr ¶
Get an array with the cumulative sum computed at every element.
- Parameters
- reverse
Reverse the operation.
Notes
Dtypes in {Int8, UInt8, Int16, UInt16} are cast to Int64 before summing to prevent overflow issues.