math.copysign() function

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math.copysign() returns a value with the magnitude x and the sign of y.

Function type signature

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

Parameters

x

({{< req >}}) Magnitude to use in the operation.

y

({{< req >}}) Sign to use in the operation.

Examples

• Return the copysign of two columns
• Use math.copysign in map

Return the copysign of two columns

Use math.copysign in map

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Input data

_time	x	y
2021-01-01T00:00:00Z	1.2	3.9
2021-01-01T01:00:00Z	2.4	-4.2
2021-01-01T02:00:00Z	3.6	5.3
2021-01-01T03:00:00Z	4.8	-6.8
2021-01-01T04:00:00Z	5.1	7.5

Output data

_time	_value
2021-01-01T00:00:00Z	1.2
2021-01-01T01:00:00Z	-2.4
2021-01-01T02:00:00Z	3.6
2021-01-01T03:00:00Z	-4.8
2021-01-01T04:00:00Z	5.1

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