Calculates ex -
1
. For values of x close to 0, the exact sum of
expm1(x) + 1
is much closer to the true
result of ex
than exp(x)
.
Function Traits: FieldComputationFunction
Parameter | Type | Required | Default | Description |
---|---|---|---|---|
as | string | optional | _expm1 | The name of the output field. |
field [a] | string | required | The name of the input field. | |
The parameter name for field
can be omitted; the following forms are equivalent:
logscale
math:expm1("value")
and:
logscale
math:expm1(field="value")