EASY-FIT Express 1.0 free download Solves constrained nonlinear parameter estimation problems (nonlinear regression, data, curve and surface fitting) and computes statistical analysis data, e.g., confidence intervals   
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EASY-FIT Express 1.0    View screenshot )


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Solves constrained nonlinear parameter estimation problems (nonlinear regression, data, curve and surface fitting) and computes statistical analysis data, e.g., confidence intervals

Updated Sep 13, 2011 19:57:36
Size64000 kb
LicenceFreeware
StatusNew Release
LanguagesEnglish
OSWindows XP
Homepageai7.uni-bayreuth.de
AuthorKlaus Schittkowski
EASY-FIT Express 1.0 free download Solves constrained nonlinear parameter estimation problems (nonlinear regression, data, curve and surface fitting) and computes statistical analysis data, e.g., confidence intervals

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Description:
   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.

   General: Arbitrary fitting criteria depending on parameters to be estimated, additional nonlinear equality or inequality constraints, and optionally on a second independent model variable

   Numerical routines: Gauss-Newton-type SQP methods, automatic differentiation, alternative norms (sum of absolute values, maximum of absolute values), confidence intervals for estimated parameters, correlation and covariance matrix, identification of significance levels for estimated parameters

   User interface: 'Find' and 'Filter' commands, extensive report and graphics facilities, also for Gnuplot, 3D plots for two model variables (surface fitting), in- and output of data from and to text or Excel files

   Limitations: 30 fitting criteria and data sets, 100 model variables, 2,000 time values, 3,000 experimental data, 200 linear or nonlinear constraints

   Modeling language (PCOMP) : Highly flexible statements depending on parameters to be estimated, tabulated data, splines, linear and piecewise constant interpolation

   Implementation: Numerical routines in Fortran executable outside of the GUI, GUI in VBA, Microsoft Access 2007 run-time version included, database with 240 examples, Windows XP or Vista (contact the author for Win 2K version)
Short tags:
data fitting, curve fitting, surface fitting, system identification, optimal design, parameter estimation, nonlinear regression
System Requirements:
MS Access 2007 runtime version, included
Free Download now  Free Download EASY-FIT Express 1.0 from ai7.uni-bayreuth.de

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Home > Software > Education > Mathematics > download now EASY-FIT Express

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