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

title	description	menu	weight
math.tanh() function	`math.tanh()` returns the hyperbolic tangent of `x`.	flux_v0_ref name parent identifier math.tanh math math/tanh	101

math.tanh() returns the hyperbolic tangent 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 hyperbolic tangent of a value
• Use math.tanh in map

Return the hyperbolic tangent of a value

import "math"

math.tanh(x: 1.23)// 0.8425793256589296

Use math.tanh in map

import "math"
import "sampledata"

sampledata.float()
    |> map(fn: (r) => ({r with _value: math.tanh(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	-0.9747656786413226	t1
2021-01-01T00:00:10Z	0.9999999993453058	t1
2021-01-01T00:00:20Z	0.9999991741504578	t1
2021-01-01T00:00:30Z	0.9999999999999988	t1
2021-01-01T00:00:40Z	0.9999999999998819	t1
2021-01-01T00:00:50Z	0.9997161301684341	t1

_time	_value	*tag
2021-01-01T00:00:00Z	1	t2
2021-01-01T00:00:10Z	0.9999035900383996	t2
2021-01-01T00:00:20Z	-0.9988944427261528	t2
2021-01-01T00:00:30Z	1	t2
2021-01-01T00:00:40Z	0.9999999999981702	t2
2021-01-01T00:00:50Z	0.9526788436890776	t2

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