$ArcTan2

Inverse tangent of ratio of arguments

Most Sirius $functions have been deprecated in favor of Object Oriented methods. There is currently no direct OO equivalent for the $ArcTan2 function.

The $ArcTan2 function returns the arctangent (in radians) of the ratio of two arguments — x divided by y. If the second argument is 0 (or omitted), an error message is printed and a 0 is returned.

Syntax

%num = $ArcTan2(x,y)

See the SIRFUNC EXEC parameter for an explanation of when this high-performance, high-precision version of the IBM mathematical function from the Sirius Mods is used, as opposed to the version of the $function in the Model 204 FUND or FUNDLE CSECT.