polars agg-groups for dataframe

Creates an agg_groups expression.

This command requires a plugin

The polars agg-groups command resides in the polars plugin. To use this command, you must install and register nu_plugin_polars. See the Plugins chapter in the book for more information.

Signature

> polars agg-groups {flags}

Input/output types:

inputoutput
expressionexpression

Examples

Get the group index of the group by operations.

> [[group value]; [one 94] [one 95] [one 96] [two 97] [two 98] [two 99]]
                | polars into-df
                | polars group-by group
                | polars agg (polars col value | polars agg-groups)
                | polars collect
                | polars sort-by group
╭───┬───────┬───────────╮
│ # │ group │  values   │
├───┼───────┼───────────┤
│ 0 │ one   │ ╭───┬───╮ │
│   │       │ │ 0 │ 0 │ │
│   │       │ │ 1 │ 1 │ │
│   │       │ │ 2 │ 2 │ │
│   │       │ ╰───┴───╯ │
│ 1 │ two   │ ╭───┬───╮ │
│   │       │ │ 0 │ 3 │ │
│   │       │ │ 1 │ 4 │ │
│   │       │ │ 2 │ 5 │ │
│   │       │ ╰───┴───╯ │
╰───┴───────┴───────────╯