polars dummies for dataframe

Creates a new dataframe with dummy variables.

This command requires a plugin

The polars dummies 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 dummies {flags}

Flags

  • --drop-first, -d: Drop first row
  • --drop-nulls, -n: Drop nulls
  • --separator, -s: Optional separator

Input/output types:

inputoutput
polars_dataframepolars_dataframe
polars_lazyframepolars_lazyframe

Examples

Create new dataframe with dummy variables from a dataframe

> [[a b]; [1 2] [3 4]] | polars into-df | polars dummies
╭───┬─────┬─────┬─────┬─────╮
│ # │ a_1 │ a_3 │ b_2 │ b_4 │
├───┼─────┼─────┼─────┼─────┤
│ 0 │   1 │   0 │   1 │   0 │
│ 1 │   0 │   1 │   0 │   1 │
╰───┴─────┴─────┴─────┴─────╯

Create new dataframe with dummy variables from a series

> [1 2 2 3 3] | polars into-df | polars dummies
╭───┬─────┬─────┬─────╮
│ # │ 0_1 │ 0_2 │ 0_3 │
├───┼─────┼─────┼─────┤
│ 0 │   1 │   0 │   0 │
│ 1 │   0 │   1 │   0 │
│ 2 │   0 │   1 │   0 │
│ 3 │   0 │   0 │   1 │
│ 4 │   0 │   0 │   1 │
╰───┴─────┴─────┴─────╯