docs-v2/content/flux/v0/stdlib/universe/highestaverage.md

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---
title: highestAverage() function
description: >
`highestAverage()` calculates the average of each input table and returns the
highest `n` averages.
menu:
flux_v0_ref:
name: highestAverage
parent: universe
identifier: universe/highestAverage
weight: 101
flux/v0/tags: [transformations, selectors]
introduced: 0.7.0
---
<!------------------------------------------------------------------------------
IMPORTANT: This page was generated from comments in the Flux source code. Any
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To make updates to this documentation, update the function comments above the
function definition in the Flux source code:
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Contributing to Flux: https://github.com/influxdata/flux#contributing
Fluxdoc syntax: https://github.com/influxdata/flux/blob/master/docs/fluxdoc.md
------------------------------------------------------------------------------->
`highestAverage()` calculates the average of each input table and returns the
highest `n` averages.
**Note:** `highestAverage()` drops empty tables.
##### Function type signature
```js
(<-tables: stream[A], n: int, ?column: string, ?groupColumns: [string]) => stream[B] where A: Record, B: Record
```
{{% caption %}}
For more information, see [Function type signatures](/flux/v0/function-type-signatures/).
{{% /caption %}}
## Parameters
### n
({{< req >}})
Number of records to return.
### column
Column to evaluate. Default is `_value`.
### groupColumns
List of columns to group by. Default is `[]`.
### tables
Input data. Default is piped-forward data (`<-`).
## Examples
### Return the highest table average from a stream of tables
```js
import "sampledata"
sampledata.int()
|> highestAverage(n: 1, groupColumns: ["tag"])
```
{{< expand-wrapper >}}
{{% expand "View example input and output" %}}
#### Input data
| _time | _value | *tag |
| -------------------- | ------- | ---- |
| 2021-01-01T00:00:00Z | -2 | t1 |
| 2021-01-01T00:00:10Z | 10 | t1 |
| 2021-01-01T00:00:20Z | 7 | t1 |
| 2021-01-01T00:00:30Z | 17 | t1 |
| 2021-01-01T00:00:40Z | 15 | t1 |
| 2021-01-01T00:00:50Z | 4 | t1 |
| _time | _value | *tag |
| -------------------- | ------- | ---- |
| 2021-01-01T00:00:00Z | 19 | t2 |
| 2021-01-01T00:00:10Z | 4 | t2 |
| 2021-01-01T00:00:20Z | -3 | t2 |
| 2021-01-01T00:00:30Z | 19 | t2 |
| 2021-01-01T00:00:40Z | 13 | t2 |
| 2021-01-01T00:00:50Z | 1 | t2 |
#### Output data
| tag | _value |
| ---- | ----------------- |
| t2 | 8.833333333333334 |
{{% /expand %}}
{{< /expand-wrapper >}}