The RG package provides a way to define a region of the complex plane. This is used in various eigensolvers to specify where the wanted eigenvalues are located.
| Beginner - Basic usage | RGCreate | RGSetFromOptions | RGView |
| RGDestroy | RGType | |
| Intermediate - Setting options for algorithms and data structures | RGCheckInside | RGGetComplement | RGSetComplement |
| RGComputeContour | RGGetType | RGSetType |
| Advanced - Setting more advanced options and customization | RGAppendOptionsPrefix | RGGetOptionsPrefix | RGRegisterAll |
| RGEllipseGetParameters | RGIntervalGetEndpoints | RGRegister |
| RGEllipseSetParameters | RGIntervalSetEndpoints | RGSetOptionsPrefix |
| Developer - Interfaces intended primarily for library developers, not for typical applications programmers | RGFinalizePackage | RGInitializePackage |
| No deprecated routines | ||