math:expm1() Query Function

Calculates e^x - 1. For values of x close to 0, the exact sum of expm1(x) + 1 is much closer to the true result of e^x than exp(x).

Parameters

Name

Type

Required

Default

Description

field

string

Yes

The name of the input field.

as

string

No

_expm1

The name of the output field.

The implied parameter is field.