dfr filter for lazyframe

Filter dataframe based in expression.

Signature

> dfr filter

Examples

Filter dataframe using an expression

> [[a b]; [6 2] [4 2] [2 2]] | dfr into-df | dfr filter ((dfr col a) >= 4)
╭───┬───┬───╮
│ # │ a │ b │
├───┼───┼───┤
│ 0 │ 6 │ 2 │
│ 1 │ 4 │ 2 │
╰───┴───┴───╯