promql/functions.go
func funcLn(vals []Value, args Expressions, enh *EvalNodeHelper) Vector {
	return simpleFunc(vals, enh, math.Log)
}
func funcLn(vals []Value, args Expressions, enh *EvalNodeHelper) Vector {
	return simpleFunc(vals, enh, math.Log)
}
func funcLn ( vals [ ] Value , args Expressions , enh * EvalNodeHelper ) Vector { return simpleFunc ( vals , enh , math . Log ) }
// === ln(Vector ValueTypeVector) Vector ===
=== ln ( Vector ValueTypeVector ) Vector ===