polars horizontal

For expression.

warning This command requires a plugin The polars horizontal 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.

Command Type

plugin

Signature

> polars horizontal {flags} (type) ...rest

Flags

• --nulls, -n: If set, null value in the input will lead to null output.

Parameters

• type: Horizontal operation. Values of all, any, min, max, sum, and mean are accepted.
• ...rest: Expression(s) that define the lazy group-by.

Input/output types:

Examples

Horizontal sum across two columns (ignore nulls by default)

> [[a b]; [1 2] [2 3] [3 4] [4 5] [5 null]]
                    | polars into-df
                    | polars select (polars horizontal sum a b)
                    | polars collect
╭───┬─────╮
│ # │ sum │
├───┼─────┤
│ 0 │   3 │
│ 1 │   5 │
│ 2 │   7 │
│ 3 │   9 │
│ 4 │   5 │
╰───┴─────╯

Horizontal sum across two columns while accounting for nulls

> [[a b]; [1 2] [2 3] [3 4] [4 5] [5 null]]
                    | polars into-df
                    | polars select (polars horizontal sum a b --nulls)
                    | polars collect
╭───┬─────╮
│ # │ sum │
├───┼─────┤
│ 0 │   3 │
│ 1 │   5 │
│ 2 │   7 │
│ 3 │   9 │
│ 4 │     │
╰───┴─────╯

Ported from nushell/nushell.github.io. Copyright (c) 2021 Nushell Project. MIT License.