dataframe

Cast a column to a different dtype.

WARNING

Dataframe commands were not shipped in the official binaries by default, you have to build it with --features=dataframe flag

Signature

> dfr cast {flags} (dtype) (column)

Parameters

• dtype: The dtype to cast the column to
• column: The column to cast. Required when used with a dataframe.

Input/output types:

input	output
any	any

Examples

Cast a column in a dataframe to a different dtype

> [[a b]; [1 2] [3 4]] | dfr into-df | dfr cast u8 a | dfr schema
╭───┬─────╮
│ a │ u8  │
│ b │ i64 │
╰───┴─────╯

Cast a column in a lazy dataframe to a different dtype

> [[a b]; [1 2] [3 4]] | dfr into-df | dfr into-lazy | dfr cast u8 a | dfr schema
╭───┬─────╮
│ a │ u8  │
│ b │ i64 │
╰───┴─────╯

Cast a column in a expression to a different dtype

> [[a b]; [1 2] [1 4]] | dfr into-df | dfr group-by a | dfr agg [ (dfr col b | dfr cast u8 | dfr min | dfr as "b_min") ] | dfr schema