polars is-null
For dataframe.
Creates mask where value is null.
warning This command requires a plugin The
polars is-nullcommand resides in thepolarsplugin. To use this command, you must install and registernu_plugin_polars. See the Plugins chapter in the book for more information.
Command Type
plugin
Signature
> polars is-null {flags}
Input/output types:
| input | output |
|---|---|
| polars_expression | polars_expression |
| polars_selector | polars_expression |
| polars_dataframe | polars_dataframe |
| polars_lazyframe | polars_lazyframe |
Examples
Create mask where values are null
> let s = ([5 6 0 8] | polars into-df);
let res = ($s / $s);
$res | polars is-null
╭───┬─────────╮
│ # │ is_null │
├───┼─────────┤
│ 0 │ false │
│ 1 │ false │
│ 2 │ true │
│ 3 │ false │
╰───┴─────────╯
Creates a is null expression from a column
> polars col a | polars is-null
Ported from nushell/nushell.github.io. Copyright (c) 2021 Nushell Project. MIT License.