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math.sqrt() function

content/flux/v0/stdlib/math/sqrt.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#L2100-L2100 Contributing to Flux: https://github.com/influxdata/flux#contributing Fluxdoc syntax: https://github.com/influxdata/flux/blob/master/docs/fluxdoc.md ------------------------------------------------------------------------------->

math.sqrt() returns the square root of x.

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

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

Parameters

x

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

Examples

Return the square root of a value

js
import "math"

math.sqrt(x: 4.0)// 2.0

Use math.sqrt in map

js
import "math"
import "sampledata"

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

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

Input data

_time*tag_value
2021-01-01T00:00:00Zt1-2.18
2021-01-01T00:00:10Zt110.92
2021-01-01T00:00:20Zt17.35
2021-01-01T00:00:30Zt117.53
2021-01-01T00:00:40Zt115.23
2021-01-01T00:00:50Zt14.43
_time*tag_value
2021-01-01T00:00:00Zt219.85
2021-01-01T00:00:10Zt24.97
2021-01-01T00:00:20Zt2-3.75
2021-01-01T00:00:30Zt219.77
2021-01-01T00:00:40Zt213.86
2021-01-01T00:00:50Zt21.86

Output data

_time_value*tag
2021-01-01T00:00:00ZNaNt1
2021-01-01T00:00:10Z3.304542328371661t1
2021-01-01T00:00:20Z2.711088342345192t1
2021-01-01T00:00:30Z4.186884283091665t1
2021-01-01T00:00:40Z3.9025632602175713t1
2021-01-01T00:00:50Z2.1047565179849186t1
_time_value*tag
2021-01-01T00:00:00Z4.455333881989093t2
2021-01-01T00:00:10Z2.2293496809607953t2
2021-01-01T00:00:20ZNaNt2
2021-01-01T00:00:30Z4.446346815083142t2
2021-01-01T00:00:40Z3.722902093797257t2
2021-01-01T00:00:50Z1.3638181696985856t2

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