dfr filter-with
for dataframe or lazyframe
Filters dataframe using a mask or expression as reference.
Signature
> dfr filter-with {flags} (mask or expression)
Parameters
mask or expression
: boolean mask used to filter data
Input/output types:
input | output |
---|---|
any | any |
Examples
Filter dataframe using a bool mask
> let mask = ([true false] | dfr into-df);
[[a b]; [1 2] [3 4]] | dfr into-df | dfr filter-with $mask
╭───┬───┬───╮
│ # │ a │ b │
├───┼───┼───┤
│ 0 │ 1 │ 2 │
╰───┴───┴───╯
Filter dataframe using an expression
> [[a b]; [1 2] [3 4]] | dfr into-df | dfr filter-with ((dfr col a) > 1)
╭───┬───┬───╮
│ # │ a │ b │
├───┼───┼───┤
│ 0 │ 3 │ 4 │
╰───┴───┴───╯
Tips: Dataframe commands were not shipped in the official binaries by default, you have to build it with --features=dataframe
flag