Calculates the arc tangent of a value; the returned angle is in the range -π/2 through π/2.

ParameterTypeRequiredDefaultDescription
asstringoptional[a]_arctan The name of the output field.
field[b]stringrequired  The name of the input field.

[a] Optional parameters use their default value unless explicitly set

[b] The argument name field can be omitted.

Omitted Argument Names

The argument name for field can be omitted; the following forms of this function are equivalent:

logscale
math:arctan("field")

and:

logscale
math:arctan(field="field")

These examples show basic structure only; full examples are provided below.