---
title: experimental.skew() function
description: >
  `experimental.skew()` returns the skew of non-null values in the `_value` column for each
  input table as a float.
menu:
  flux_v0_ref:
    name: experimental.skew
    parent: experimental
    identifier: experimental/skew
weight: 101
flux/v0/tags: [transformations, aggregates]
introduced: 0.107.0
---

<!------------------------------------------------------------------------------

IMPORTANT: This page was generated from comments in the Flux source code. Any
edits made directly to this page will be overwritten the next time the
documentation is generated. 

To make updates to this documentation, update the function comments above the
function definition in the Flux source code:

https://github.com/influxdata/flux/blob/master/stdlib/experimental/experimental.flux#L911-L911

Contributing to Flux: https://github.com/influxdata/flux#contributing
Fluxdoc syntax: https://github.com/influxdata/flux/blob/master/docs/fluxdoc.md

------------------------------------------------------------------------------->

`experimental.skew()` returns the skew of non-null values in the `_value` column for each
input table as a float.



##### Function type signature

```js
(<-tables: stream[{A with _value: float}]) => stream[{A with _value: float}]
```

{{% caption %}}
For more information, see [Function type signatures](/flux/v0/function-type-signatures/).
{{% /caption %}}

## Parameters

### tables

Input data. Default is piped-forward data (`<-`).




## Examples

### Return the skew of input tables

```js
import "experimental"
import "sampledata"

sampledata.float()
    |> experimental.skew()

```

{{< expand-wrapper >}}
{{% expand "View example input and output" %}}

#### Input data

| _time                | *tag | _value  |
| -------------------- | ---- | ------- |
| 2021-01-01T00:00:00Z | t1   | -2.18   |
| 2021-01-01T00:00:10Z | t1   | 10.92   |
| 2021-01-01T00:00:20Z | t1   | 7.35    |
| 2021-01-01T00:00:30Z | t1   | 17.53   |
| 2021-01-01T00:00:40Z | t1   | 15.23   |
| 2021-01-01T00:00:50Z | t1   | 4.43    |

| _time                | *tag | _value  |
| -------------------- | ---- | ------- |
| 2021-01-01T00:00:00Z | t2   | 19.85   |
| 2021-01-01T00:00:10Z | t2   | 4.97    |
| 2021-01-01T00:00:20Z | t2   | -3.75   |
| 2021-01-01T00:00:30Z | t2   | 19.77   |
| 2021-01-01T00:00:40Z | t2   | 13.86   |
| 2021-01-01T00:00:50Z | t2   | 1.86    |


#### Output data

| *tag | _value               |
| ---- | -------------------- |
| t1   | -0.30467248990094525 |

| *tag | _value               |
| ---- | -------------------- |
| t2   | -0.11050153536874797 |

{{% /expand %}}
{{< /expand-wrapper >}}