---
title: math.asinh() function
description: math.asinh() returns the inverse hyperbolic sine of x.
url: https://docs.influxdata.com/flux/v0/stdlib/math/asinh/
estimated_tokens: 1415
product: Flux
version: v0
---

# math.asinh() function

-   Flux 0.22.0+
-   View InfluxDB support

`math.asinh()` returns the inverse hyperbolic sine of `x`.

##### Function type signature

```js
(x: float) => float
```

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

## Parameters

### x

(Required) Value to operate on.

## Examples

-   [Return the inverse hyperbolic sine of a value](#return-the-inverse-hyperbolic-sine-of-a-value)
-   [Use math.asinh in map](#use-mathasinh-in-map)

### Return the inverse hyperbolic sine of a value

```js
import "math"

math.asinh(x: 3.14)// 1.8618125572133835

```

### Use math.asinh in map

```js
import "math"
import "sampledata"

sampledata.float()
    |> map(fn: (r) => ({r with _value: math.asinh(x: r._value)}))
```

[](#view-example-input-and-output)

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

| _time | _value | *tag |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | -1.5213531182383162 | t1 |
| 2021-01-01T00:00:10Z | 3.0858330878095224 | t1 |
| 2021-01-01T00:00:20Z | 2.692443398164797 | t1 |
| 2021-01-01T00:00:30Z | 3.5578734234029126 | t1 |
| 2021-01-01T00:00:40Z | 3.4174904141531415 | t1 |
| 2021-01-01T00:00:50Z | 2.1940489315838474 | t1 |

| _time | _value | *tag |
| --- | --- | --- |
| 2021-01-01T00:00:00Z | 3.681985066226324 | t2 |
| 2021-01-01T00:00:10Z | 2.3065378213935075 | t2 |
| 2021-01-01T00:00:20Z | -2.0322246215338136 | t2 |
| 2021-01-01T00:00:30Z | 3.6779518317559377 | t2 |
| 2021-01-01T00:00:40Z | 3.323453049376607 | t2 |
| 2021-01-01T00:00:50Z | 1.3792134765550192 | t2 |