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.
Parameters
x
(Required) Magnitude to use in the operation.
y
(Required) Sign to use in the operation.
Examples
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)}))
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