polars n-unique for dataframe
Counts unique values.
Signature
> polars n-unique {flags}
Input/output types:
| input | output |
|---|---|
| polars_expression | 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
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https://www.nushell.sh/commands/docs/polars_n-unique.html
