dataframe

Cumulative calculation for a series.

Signature

> polars cumulative {flags} (type)

Flags

• --reverse, -r: Reverse cumulative calculation

Parameters

• type: rolling operation

Input/output types:

input	output
any	any

Examples

Cumulative sum for a series

> [1 2 3 4 5] | polars into-df | polars cumulative sum
╭───┬──────────────────╮
│ # │ 0_cumulative_sum │
├───┼──────────────────┤
│ 0 │                1 │
│ 1 │                3 │
│ 2 │                6 │
│ 3 │               10 │
│ 4 │               15 │
╰───┴──────────────────╯

Cumulative sum for a series in reverse order

> [1 2 3 4 5] | polars into-df | polars cumulative sum --reverse
╭───┬──────────────────╮
│ # │ 0_cumulative_sum │
├───┼──────────────────┤
│ 0 │               15 │
│ 1 │               14 │
│ 2 │               12 │
│ 3 │                9 │
│ 4 │                5 │
╰───┴──────────────────╯