math.lgamma() function
math.lgamma() returns the natural logarithm and sign (-1 or +1) of math.gamma(x:x).
Function type signature
(x: float) => {sign: int, lgamma: float}
For more information, see Function type signatures.
Parameters
x
(Required) Value to operate on.
Examples
Return the natural logarithm and sign of a gamma function
import "math"
math.lgamma(x: 3.14)// {lgamma: 0.8261387047770286, sign: 1}
Use math.lgamma in map
import "sampledata"
import "math"
sampledata.float()
|> map(
fn: (r) => {
result = math.lgamma(x: r._value)
return {r with lgamma: result.lgamma, sign: result.sign}
},
)
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