dfr col for expression

Creates a named column expression.

Signature

> dfr col {flags} (column name)

Parameters

• column name: Name of column to be used

Input/output types:

input	output
any	any

Examples

Creates a named column expression and converts it to a rsh object

> dfr col a | dfr into-rsh
╭───────┬────────╮
│ expr  │ column │
│ value │ a      │
╰───────┴────────╯

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