dfr n-unique
for dataframe
Counts unique values.
WARNING
Dataframe commands were not shipped in the official binaries by default, you have to build it with --features=dataframe
flag
Signature
> dfr n-unique {flags}
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