dfr arg-min for dataframe

Return index for min value in series.

Signature

> dfr arg-min

Examples

Returns index for min value

> [1 3 2] | dfr into-df | dfr arg-min
╭───┬─────────╮
│ # │ arg_min │
├───┼─────────┤
│ 0 │       0 │
╰───┴─────────╯