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

title	description	menu	weight
math.nextafter() function	`math.nextafter()` returns the next representable float value after `x` towards `y`.	flux_v0_ref name parent identifier math.nextafter math math/nextafter	101

math.nextafter() returns the next representable float value after x towards y.

Function type signature

(x: float, y: float) => float

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Parameters

x

({{< req >}}) x-value to use in the operation.

y

({{< req >}}) y-value to use in the operation.

Examples

• Return the next possible float value
• Use math.nextafter in map

Return the next possible float value

import "math"

math.nextafter(x: 1.23, y: 4.56)// 1.2300000000000002

Use math.nextafter in map

import "math"

data
    |> map(fn: (r) => ({_time: r._time, _value: math.nextafter(x: r.t1, y: r.t2)}))

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Input data

_time	t1	t2
2021-01-01T00:00:00Z	-2.18	19.85
2021-01-01T00:00:10Z	10.92	4.97
2021-01-01T00:00:20Z	7.35	-3.75
2021-01-01T00:00:30Z	17.53	19.77
2021-01-01T00:00:40Z	15.23	13.86
2021-01-01T00:00:50Z	4.43	1.86

Output data

_time	_value
2021-01-01T00:00:00Z	-2.1799999999999997
2021-01-01T00:00:10Z	10.919999999999998
2021-01-01T00:00:20Z	7.349999999999999
2021-01-01T00:00:30Z	17.530000000000005
2021-01-01T00:00:40Z	15.229999999999999
2021-01-01T00:00:50Z	4.429999999999999

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