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

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

math.gamma() returns the gamma function 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 gamma function of a value
• Use math.gamma in map

Return the gamma function of a value

import "math"

math.gamma(x: 2.12)// 1.056821007887572

Use math.gamma in map

import "sampledata"
import "math"

sampledata.float()
    |> map(fn: (r) => ({r with _value: math.gamma(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	-2.4674191070057323	t1
2021-01-01T00:00:10Z	3007373.527042938	t1
2021-01-01T00:00:20Z	1399.634749015074	t1
2021-01-01T00:00:30Z	93234791408407.83	t1
2021-01-01T00:00:40Z	161558763355.0403	t1
2021-01-01T00:00:50Z	10.560583496997582	t1

_time	_value	*tag
2021-01-01T00:00:00Z	77953108609300690	t2
2021-01-01T00:00:10Z	22.94201890526749	t2
2021-01-01T00:00:20Z	0.26786612886141653	t2
2021-01-01T00:00:30Z	61513013150171220	t2
2021-01-01T00:00:40Z	4328485003.951652	t2
2021-01-01T00:00:50Z	0.9486870416779484	t2

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