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).


Name Type Required Default Description
field string Yes The name of the input field.
as string No _expm1 The name of the output field.

field is the unnamed parameter.