EASY-FIT Express

Developer's DescriptionBy Klaus SchittkowskiPerform constrained nonlinear parameter estimation, data, curve and surface fitting.The software system solves constrained nonlinear parameter estimation problems. Synonyms are data fitting, nonlinear regression, parameter identification, curve and surface fitting. The numerical methods are based on highly efficient Gauss-Newton-SQP algorithms.Model functions are defined in a modeling language called PCOMP and are interpreted and evaluated during runtime.