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

Parameters

x

(Required) Magnitude to use in the operation.

y

(Required) Sign to use in the operation.

Examples

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

Return the copysign of two columns

import "math"

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

Use math.copysign in map

import "math"

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