nushell/docs/commands/dfr_is-null.md
Justin Ma c0a1d18e3d
update #4455, regenerate commands' docs and update make_docs script (#4586)
* feat: update #4455, regenerate commands' docs

* chore: update make_docs script
2022-02-21 11:26:00 -06:00

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---
title: dfr is-null
layout: command
version: 0.59.0
---
Creates mask where value is null
## Signature
```> dfr is-null ```
## Examples
Create mask where values are null
```shell
> let s = ([5 6 0 8] | dfr to-df);
let res = ($s / $s);
$res | dfr is-null
```