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math.nextafter() function

content/flux/v0/stdlib/math/nextafter.md

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<!------------------------------------------------------------------------------ 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#L1741-L1741 Contributing to Flux: https://github.com/influxdata/flux#contributing Fluxdoc syntax: https://github.com/influxdata/flux/blob/master/docs/fluxdoc.md ------------------------------------------------------------------------------->

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

Function type signature
js
(x: float, y: float) => float

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

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

js
import "math"

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


Use math.nextafter in map

js
import "math"

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

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

Input data

_timet1t2
2021-01-01T00:00:00Z-2.1819.85
2021-01-01T00:00:10Z10.924.97
2021-01-01T00:00:20Z7.35-3.75
2021-01-01T00:00:30Z17.5319.77
2021-01-01T00:00:40Z15.2313.86
2021-01-01T00:00:50Z4.431.86

Output data

_time_value
2021-01-01T00:00:00Z-2.1799999999999997
2021-01-01T00:00:10Z10.919999999999998
2021-01-01T00:00:20Z7.349999999999999
2021-01-01T00:00:30Z17.530000000000005
2021-01-01T00:00:40Z15.229999999999999
2021-01-01T00:00:50Z4.429999999999999

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