125 lines
3.2 KiB
Markdown
125 lines
3.2 KiB
Markdown
---
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title: math.sin() function
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description: >
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`math.sin()` returns the sine of the radian argument `x`.
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menu:
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flux_v0_ref:
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name: math.sin
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parent: math
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identifier: math/sin
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weight: 101
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---
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<!------------------------------------------------------------------------------
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IMPORTANT: This page was generated from comments in the Flux source code. Any
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edits made directly to this page will be overwritten the next time the
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documentation is generated.
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To make updates to this documentation, update the function comments above the
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function definition in the Flux source code:
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https://github.com/influxdata/flux/blob/master/stdlib/math/math.flux#L1994-L1994
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Contributing to Flux: https://github.com/influxdata/flux#contributing
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Fluxdoc syntax: https://github.com/influxdata/flux/blob/master/docs/fluxdoc.md
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------------------------------------------------------------------------------->
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`math.sin()` returns the sine of the radian argument `x`.
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##### Function type signature
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```js
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(x: float) => float
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```
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{{% caption %}}
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For more information, see [Function type signatures](/flux/v0/function-type-signatures/).
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{{% /caption %}}
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## Parameters
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### x
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({{< req >}})
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Radian value to use in the operation.
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## Examples
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- [Return the sine of a radian value](#return-the-sine-of-a-radian-value)
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- [Use math.sin in map](#use-mathsin-in-map)
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### Return the sine of a radian value
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```js
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import "math"
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math.sin(x: 3.14)// 0.0015926529164868282
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```
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### Use math.sin in map
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```js
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import "math"
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import "sampledata"
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sampledata.float()
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|> map(fn: (r) => ({r with _value: math.sin(x: r._value)}))
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```
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{{< expand-wrapper >}}
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{{% expand "View example input and output" %}}
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#### Input data
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| _time | *tag | _value |
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| -------------------- | ---- | ------- |
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| 2021-01-01T00:00:00Z | t1 | -2.18 |
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| 2021-01-01T00:00:10Z | t1 | 10.92 |
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| 2021-01-01T00:00:20Z | t1 | 7.35 |
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| 2021-01-01T00:00:30Z | t1 | 17.53 |
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| 2021-01-01T00:00:40Z | t1 | 15.23 |
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| 2021-01-01T00:00:50Z | t1 | 4.43 |
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| _time | *tag | _value |
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| -------------------- | ---- | ------- |
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| 2021-01-01T00:00:00Z | t2 | 19.85 |
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| 2021-01-01T00:00:10Z | t2 | 4.97 |
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| 2021-01-01T00:00:20Z | t2 | -3.75 |
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| 2021-01-01T00:00:30Z | t2 | 19.77 |
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| 2021-01-01T00:00:40Z | t2 | 13.86 |
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| 2021-01-01T00:00:50Z | t2 | 1.86 |
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#### Output data
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| _time | _value | *tag |
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| -------------------- | ------------------- | ---- |
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| 2021-01-01T00:00:00Z | -0.8201039476213742 | t1 |
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| 2021-01-01T00:00:10Z | -0.9971456224759652 | t1 |
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| 2021-01-01T00:00:20Z | 0.8756667135928823 | t1 |
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| 2021-01-01T00:00:30Z | -0.9686047952311415 | t1 |
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| 2021-01-01T00:00:40Z | 0.4599716480084409 | t1 |
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| 2021-01-01T00:00:50Z | -0.9603924882355435 | t1 |
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| _time | _value | *tag |
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| -------------------- | ------------------- | ---- |
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| 2021-01-01T00:00:00Z | 0.8417108384451784 | t2 |
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| 2021-01-01T00:00:10Z | -0.9670013802437661 | t2 |
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| 2021-01-01T00:00:20Z | 0.5715613187423438 | t2 |
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| 2021-01-01T00:00:30Z | 0.7958705732618963 | t2 |
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| 2021-01-01T00:00:40Z | 0.9618345122584524 | t2 |
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| 2021-01-01T00:00:50Z | 0.9584712830789142 | t2 |
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{{% /expand %}}
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{{< /expand-wrapper >}}
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