dfr unique
for [dataframe or lazyframe](/commands/categories/dataframe or lazyframe.md)
Returns unique values from a dataframe.
WARNING
Dataframe commands were not shipped in the official binaries by default, you have to build it with --features=dataframe
flag
Signature
> dfr unique {flags}
Flags
--subset, -s {any}
: Subset of column(s) to use to maintain rows (lazy df)--last, -l
: Keeps last unique value. Default keeps first value (lazy df)--maintain-order, -k
: Keep the same order as the original DataFrame (lazy df)
Input/output types:
input | output |
---|---|
any | any |
Examples
Returns unique values from a series
> [2 2 2 2 2] | dfr into-df | dfr unique
╭───┬───╮
│ # │ 0 │
├───┼───┤
│ 0 │ 2 │
╰───┴───╯
Creates a is unique expression from a column
> col a | unique