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

Function Traits: FieldComputationFunction

ParameterTypeRequiredDefaultDescription
asstringoptional_arctan The name of the output field.
field[a]stringrequired  The name of the input field.

[a] The argument name field can be omitted.

The parameter name for field can be omitted; the following forms are equivalent:

logscale
math:arctan("value")

and:

logscale
math:arctan(field="value")