Called by the generic function Atan(x) when x is of type Workspace.
WORKSPACE_ARCTAN() w1=Workspace atan(w)
The default procedure definition and the calculation of errors for this procedure is shown below.
PROCEDURE workspace_arctan; PARAMETERS w1=workspace; RESULT wres wres = w1 wres.y = arctan(w1.y) wres.e = w1.e / sqrt( 1 - w1.y^2 ) ENDPROCEDURE