polars n-unique
For dataframe.
Counts unique values.
warning This command requires a plugin The
polars n-uniquecommand resides in thepolarsplugin. To use this command, you must install and registernu_plugin_polars. See the Plugins chapter in the book for more information.
Command Type
plugin
Signature
> polars n-unique {flags}
Input/output types:
| input | output |
|---|---|
| polars_expression | polars_expression |
| polars_selector | polars_expression |
| polars_dataframe | polars_dataframe |
| polars_lazyframe | polars_lazyframe |
Examples
Counts unique values
> [1 1 2 2 3 3 4] | polars into-df | polars n-unique
╭───┬──────────────╮
│ # │ count_unique │
├───┼──────────────┤
│ 0 │ 4 │
╰───┴──────────────╯
Creates a is n-unique expression from a column
> polars col a | polars n-unique
Ported from nushell/nushell.github.io. Copyright (c) 2021 Nushell Project. MIT License.