dfr mean
for expression
Creates a mean expression for an aggregation or aggregates columns to their mean value
Signature
> dfr mean
Input/output types:
input | output |
---|---|
any | any |
Examples
Mean value from columns in a dataframe
> [[a b]; [6 2] [4 2] [2 2]] | dfr into-df | dfr mean
╭───┬──────┬──────╮
│ # │ a │ b │
├───┼──────┼──────┤
│ 0 │ 4.00 │ 2.00 │
╰───┴──────┴──────╯
Mean 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 mean)
╭───┬─────┬──────╮
│ # │ a │ b │
├───┼─────┼──────┤
│ 0 │ one │ 3.00 │
│ 1 │ two │ 1.00 │
╰───┴─────┴──────╯
Tips: Dataframe commands were not shipped in the official binaries by default, you have to build it with --features=dataframe
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