docs-v2/content/flux/v0/stdlib/math/cbrt.md

title	description	menu	weight
math.cbrt() function	`math.cbrt()` returns the cube root of x.	flux_v0_ref name parent identifier math.cbrt math math/cbrt	101

math.cbrt() returns the cube root of x.

Function type signature

(x: float) => float

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

Parameters

x

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

Examples

• Return the cube root of a value
• Use math.cbrt in map

Return the cube root of a value

import "math"

math.cbrt(x: 1728.0)// 12.0

Use math.cbrt in map

import "math"
import "sampledata"

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

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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	-1.296638256974172	t1
2021-01-01T00:00:10Z	2.2185755003939347	t1
2021-01-01T00:00:20Z	1.9442962850073848	t1
2021-01-01T00:00:30Z	2.5977297737212623	t1
2021-01-01T00:00:40Z	2.478753275547562	t1
2021-01-01T00:00:50Z	1.6423582966480554	t1

_time	_value	*tag
2021-01-01T00:00:00Z	2.7076145363999617	t2
2021-01-01T00:00:10Z	1.7065491319882757	t2
2021-01-01T00:00:20Z	-1.5536162529769295	t2
2021-01-01T00:00:30Z	2.703972205402708	t2
2021-01-01T00:00:40Z	2.402081527496116	t2
2021-01-01T00:00:50Z	1.2298089464641	t2

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