math:expm1() | Data Analysis 1.143.0-1.153.3

`math:expm1()`

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).

Parameter	Type	Required	Default Value	Description
`as`	string	optional^[a]	`_expm1`	The name of the output field.
`field`^[b]	string	required		The name of the input field.
^[a]Optional parameters use their default value unless explicitly set. ^[b]The argument name `field` can be omitted.

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Omitted Argument Names
The argument name for field can be omitted; the following forms of this function are equivalent:
logscale
math:expm1("field")
and:
logscale
math:expm1(field="field")
These examples show basic structure only.