Computes the hyperbolic cosine of a double field. The hyperbolic cosine of x is defined to be (ex + e-x)/2 where e is Euler's number.

ParameterTypeRequiredDefault ValueDescription
asstringoptional[a] _cosh The name of the output field.
fieldstringrequired   The name of the input field.

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