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

title	description	menu	weight
math.exp() function	`math.exp()` returns `e**x`, the base-e exponential of `x`.	flux_v0_ref name parent identifier math.exp math math/exp	101

math.exp() returns e**x, the base-e exponential 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 base-e exponential of a value
• Use math.exp in map

Return the base-e exponential of a value

import "math"

math.exp(x: 21.0)// 1.3188157344832146e+09

Use math.exp in map

import "sampledata"
import "math"

sampledata.float()
    |> map(fn: (r) => ({r with _value: math.exp(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	0.11304153064044985	t1
2021-01-01T00:00:10Z	55270.798943169066	t1
2021-01-01T00:00:20Z	1556.1965278371533	t1
2021-01-01T00:00:30Z	41037629.64620374	t1
2021-01-01T00:00:40Z	4114385.297453036	t1
2021-01-01T00:00:50Z	83.93141691026881	t1

_time	_value	*tag
2021-01-01T00:00:00Z	417585553.5730289	t2
2021-01-01T00:00:10Z	144.02688737091955	t2
2021-01-01T00:00:20Z	0.023517745856009107	t2
2021-01-01T00:00:30Z	385480050.5181745	t2
2021-01-01T00:00:40Z	1045493.9383645338	t2
2021-01-01T00:00:50Z	6.423736771429135	t2

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