dfr max
for expression
Creates a max expression or aggregates columns to their max value
Signature
> dfr max {flags}
Input/output types:
input | output |
---|---|
any | any |
Examples
Max value from columns in a dataframe
> [[a b]; [6 2] [1 4] [4 1]] | dfr into-df | dfr max
╭───┬───┬───╮
│ # │ a │ b │
├───┼───┼───┤
│ 0 │ 6 │ 4 │
╰───┴───┴───╯
Max aggregation for a group-by
> [[a b]; [one 2] [one 4] [two 1]]
| dfr into-df
| dfr group-by a
| dfr agg (dfr col b | dfr max)
╭───┬─────┬───╮
│ # │ a │ b │
├───┼─────┼───┤
│ 0 │ one │ 4 │
│ 1 │ two │ 1 │
╰───┴─────┴───╯
Tips: Dataframe commands were not shipped in the official binaries by default, you have to build it with --features=dataframe
flag