dfr n-unique
for dataframe
Counts unique values.
Signature
> dfr n-unique
Input/output types:
input | output |
---|---|
any | any |
Examples
Counts unique values
> [1 1 2 2 3 3 4] | dfr into-df | dfr n-unique
╭───┬──────────────╮
│ # │ count_unique │
├───┼──────────────┤
│ 0 │ 4 │
╰───┴──────────────╯
Creates a is n-unique expression from a column
> dfr col a | dfr n-unique
Tips: Dataframe commands were not shipped in the official binaries by default, you have to build it with --features=dataframe
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