math.copysign() function

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

Function type signature
(x: float, y: float) => float
For more information, see Function type signatures.



(Required) Magnitude to use in the operation.


(Required) Sign to use in the operation.


Return the copysign of two columns

import "math"

math.copysign(x: 1.0, y: 2.0)

Use math.copysign in map

import "math"

    |> map(fn: (r) => ({_time: r._time, _value: math.copysign(x: r.x, y: r.y)}))

View example input and output

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