polars append for dataframe

Appends a new dataframe.

This command requires a plugin

The polars append command resides in the polars plugin. To use this command, you must install and register nu_plugin_polars. See the Plugins chapter in the book for more information.

Signature

> polars append {flags} (other)

Flags

  • --col, -c: append as new columns instead of rows

Parameters

  • other: other dataframe to append

Input/output types:

inputoutput
anyany

Examples

Appends a dataframe as new columns

> let a = ([[a b]; [1 2] [3 4]] | polars into-df);
    $a | polars append $a
╭───┬───┬───┬─────┬─────╮
│ # │ a │ b │ a_x │ b_x │
├───┼───┼───┼─────┼─────┤
│ 0 │ 1 │ 2 │   1 │   2 │
│ 1 │ 3 │ 4 │   3 │   4 │
╰───┴───┴───┴─────┴─────╯

Appends a dataframe merging at the end of columns

> let a = ([[a b]; [1 2] [3 4]] | polars into-df); $a | polars append $a --col
╭───┬───┬───╮
│ # │ a │ b │
├───┼───┼───┤
│ 0 │ 1 │ 2 │
│ 1 │ 3 │ 4 │
│ 2 │ 1 │ 2 │
│ 3 │ 3 │ 4 │
╰───┴───┴───╯