math.acosh() function

<!------------------------------------------------------------------------------ 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/math/math.flux#L160-L160 Contributing to Flux: https://github.com/influxdata/flux#contributing Fluxdoc syntax: https://github.com/influxdata/flux/blob/master/docs/fluxdoc.md ------------------------------------------------------------------------------->

math.acosh() returns the inverse hyperbolic cosine of x.

Function type signature

{{% caption %}} For more information, see Function type signatures. {{% /caption %}}

Parameters

x

({{< req >}}) Value to operate on.

x should be greater than 1. If less than 1 the operation will return NaN.

Examples

• Return the inverse hyperbolic cosine of a value
• Use math.acosh in map

Return the inverse hyperbolic cosine of a value

Use math.acosh in map

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

Input data

_time	*tag	_value
2021-01-01T00:00:00Z	t1	-0.21800000000000003
2021-01-01T00:00:10Z	t1	1.092
2021-01-01T00:00:20Z	t1	0.735
2021-01-01T00:00:30Z	t1	1.7530000000000001
2021-01-01T00:00:40Z	t1	1.5230000000000001
2021-01-01T00:00:50Z	t1	0.443

_time	*tag	_value
2021-01-01T00:00:00Z	t2	1.9850000000000003
2021-01-01T00:00:10Z	t2	0.497
2021-01-01T00:00:20Z	t2	-0.375
2021-01-01T00:00:30Z	t2	1.977
2021-01-01T00:00:40Z	t2	1.3860000000000001
2021-01-01T00:00:50Z	t2	0.18600000000000003

Output data

_time	_value	*tag
2021-01-01T00:00:00Z	NaN	t1
2021-01-01T00:00:10Z	0.42572984537574377	t1
2021-01-01T00:00:20Z	NaN	t1
2021-01-01T00:00:30Z	1.1608966388962805	t1
2021-01-01T00:00:40Z	0.9827177940622978	t1
2021-01-01T00:00:50Z	NaN	t1

_time	_value	*tag
2021-01-01T00:00:00Z	1.308254013849232	t2
2021-01-01T00:00:10Z	NaN	t2
2021-01-01T00:00:20Z	NaN	t2
2021-01-01T00:00:30Z	1.3035758471451702	t2
2021-01-01T00:00:40Z	0.8525776257667146	t2
2021-01-01T00:00:50Z	NaN	t2

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