Freeware Listing: Nonlinear
- Nonlinear SISO system analysis using simulink
- License: Freeware

Single tank nonlinear model using simuling and linearization of it to find the transfer funtion. Response ot the linear and nonlinear system comparision.
- Publisher: Ankit Shah
- Date: 18-05-2013
- Size: 31 KB
- Platform: Matlab, Scripts
- Nonlinear Control of 3 DOF PUMA Robot
- License: Freeware

Three different nonlinear control algorithms are used to control a three degree of freedom PUMA560 robot. These algorithms are: Computed Torque Control, Sliding Mode and Backstepping Control. The robot dynamics are taken from: Brian Armstrong, Oussama Khatib & Joel Burdick , 'The Explicit Dynamic Model and Inertial Parameters of the PUMA 560 Arm' , Stanford University, Artificial Intelligence Laboratory, IEEE 1986 Put the libraries lorenz3d, sfunxyz and m3dscope into your work folder of the MATLAB.
- Publisher: Abdel-Razzak
- Date: 22-01-2013
- Size: 389 KB
- Platform: Matlab, Scripts
- GUI for Generalized Nonlinear Non-analytic Chi-Square Fitting
- License: Freeware

FitChiTool provides an interface similar to the Curve Fitting Toolbox to the fitChiSquare function. This allows you to perform fits using chi-square when measurement errors are known on linear or nonlinear models. It allows allows you to perform fits with multiple independent (more than one x) variables. If measurement errors are unknown, it performs nonlinear least-squares fitting (chi-square equal to 1). To get started with FitChiTool, run the tutorial in the included HTML documentation (or run FitChiToolExample)..
- Publisher: Nathaniel Brahms
- Date: 07-05-2013
- Size: 225 KB
- Platform: Matlab, Scripts
- EASY-FIT Express
- License: Freeware

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...
- Publisher: Klaus Schittkowski
- Date: 15-03-2009
- Size: 64000 KB
- Platform: WinOther, WinVista
- EASY-OPT Express
- License: Freeware

The software system allows to solve constrained nonlinear programming problems by an efficient sequential quadratic programming (SQP) method. A nonlinear objective function is to be minimized subject to nonlinear equality or inequality constraints. The mathematical method represents the scientific state-of-the-art. Model functions are defined in a modeling language called PCOMP and are interpreted and evaluated during runtime. It is assumed that all nonlinear functions are differentiable. Gradients are computed automatically. EASY-OPT Express is particularly useful for classroom exercises of optimization courses or to become familiar with optimization routines before starting a real life implementation.
- Publisher: Klaus Schittkowski
- Date: 15-03-2009
- Size: 60268 KB
- Platform: WinOther
- APMonitor Modeling Language
- License: Freeware

The APMonitor Modeling Language is optimization software for differential and algebraic equations. It is coupled with large-scale nonlinear programming solvers for data reconciliation, real-time optimization, dynamic simulation, and nonlinear predictive control. It is available as a free web service or for commercial licensing. Try Example Optimization Problems Browse or modify example problems to start solving nonlinear programming problems with up to 10 million variables through a web-interface. Discussion Forum and Webinars Users share experiences and collaborate through an online discussion forum and regularly scheduled webinars.
- Publisher: APMonitor
- Date: 02-11-2012
- Size: 225 KB
- Platform: WinOther
- Biopsychology Nonlinear Toolbox
- License: Freeware

The Biopsychology Nonlinear Toolbox is a MATLAB toolbox that combines established analysis routines in one easy to use graphical user interface..
- Publisher: biopsynltoolbox.sourceforge.net
- Date: 26-06-2012
- Size: 17414 KB
- Platform: Linux, Mac OS X, WinOther
- JANE: Just Another Nonlinear Editor
- License: Freeware

A nonlinear video editor designed to be highly modular andextensible..
- Publisher: jane.sourceforge.net
- Date: 20-05-2012
- Size: 230 KB
- Platform: Linux, Unix
- Nonlinear Optic Tools (nlo)
- License: Freeware

NLO helps studying the nonlinear optical effects of crystals. It offers a GUI to plot the theoret. expected "maker fringes", captures images from video, retrieves data from and sends data to a LockIn, controls a stepping motor, imports and plots datase.
- Publisher: nlo.wiki.sourceforge.net
- Date: 11-06-2012
- Size: 3911 KB
- Platform: Linux, Mac OS X, WinOther
- Edge detection by nonlinear derivatives
- License: Freeware

The proposed algorithm is based on nonlinear derivatives to automatically select the best edge information. This algorithm can replace the classical derivative with the following benefits: - univocal edge localization for synthetic and real images - noise reduction with no regularization: the noise level is weaker that the noise level in the original image - better direction estimation of the gradient - can product a confident edge reference map with synthetic images - extremely efficient on salt noise OR pepper noise (this last case needs a change in the nonlinear derivatives) - still noise reduction with regularized schemes (Canny, Demigny, .
- Publisher: Olivier LALIGANT
- Date: 11-03-2013
- Size: 10 KB
- Platform: Matlab, Scripts
- Pattern formation and KPP equation
- License: Freeware

This 15-line matlab program solves the nonlinear reaction diffusion equation, called Kolmogorov-Petrovskii-Piskunov (KPP) equation to generate patterns (ribbons and rings). The numerical method is simple and program is easy to understand, and it can be extended to simulated more complex systems. The snapshot was generated by pattern(400);.
- Publisher: Xin-She Yang
- Date: 25-01-2013
- Size: 10 KB
- Platform: Matlab, Scripts
- LMFsolve.m: Levenberg-Marquardt-Fletcher algorithm for nonlinear least squares problems
- License: Freeware

The function LMFsolve.m serves for finding optimal solution of an overdetermined system of nonlinear equations in the least-squares sense. The standard Levenberg- Marquardt algorithm was modified by Fletcher and coded in FORTRAN many years ago. LMFsolve is its essentially shortened version implemented in MATLAB and complemented by setting iteration parameters as options. This part of the code has been strongly influenced by Duane Hanselman's function mmfsolve.m. Next to it, a finite difference approximation of Jacobian matrix is appended to it as a nested subfunction as well as a function for dispaying of intermediate results.
- Publisher: Miroslav Balda
- Date: 01-02-2013
- Size: 10 KB
- Platform: Matlab, Scripts
- Nonlinear F-16 Fighter Model
- License: Freeware

This ZIP file contains the nonlinear model of an F-16 fighter aircraft in MATLAB/Simulink, Both high-fidelity and low-fidelity aerodynamic data are available, taken from NASA report 1538 and "Aircraft Control and Simulation" by Lewis & Stevens. A trim function is also included. F16dyn.c and F16dynam.c contain essentially the same model, only differing in the use of quaternions vs. Euler angles. F16dynam_complex.c is updated with more general equations of motion so that cg shifts can be taken into account. F16dyn_decoupled.c created by E.R. van Oort contains a model with decoupled left and right ailerons and elevators.
- Publisher: Lars Sonneveldt
- Date: 17-04-2013
- Size: 768 KB
- Platform: Matlab, Scripts
- MATLAB interface for L-BFGS-B
- License: Freeware

L-BFGS-B is a collection of Fortran 77 routines for solving nonlinear optimization problems with bound constraints on the variables. One of the key features of the nonlinear solver is that the Hessian is not needed. I've designed an interface to the L-BFGS-B solver so that it can be called like any other function in MATLAB.
- Publisher: Peter Carbonetto
- Date: 23-02-2013
- Size: 61 KB
- Platform: Matlab, Scripts
- Golden Section Search and Davidon Fletcher Powell
- License: Freeware

Golden Section search for minimizing a nonlinear function in one dimension Davidon-Fletcher-Powell (DFP) method. This is a method to solve an unconstrained nonlinear program.
- Publisher: MEKHMOUKH Abdenour
- Date: 22-02-2013
- Size: 164 KB
- Platform: Matlab, Scripts
- Global and Non-smooth optimization toolbox
- License: Freeware

GANSO is a programming library for global and nonsmooth, nonlinear optimization. Unlike local methods (e.g., quasi-Newton), global optimization methods aim at locating the absolute minimum of a function, not the nearest stationary point. GANSO toolbox provides an interface for calling GANSO methods from Matlab. The user manual describes various optimization strategies, complete syntaxis and several examples of Matlab code..
- Publisher: Gleb Beliakov
- Date: 22-02-2013
- Size: 205 KB
- Platform: Matlab, Scripts
- Measures of Analysis of Time Series toolkit (MATS)
- License: Freeware

Measures of Analysis of Time Series (MATS) toolkit computes a number of different measures of analysis of scalar time series (linear, nonlinear and other statistical measures). It also contains pre-processing tools (transformations and standardizations), data splitting facility, resampled data generation, and visualization facilities for the time series and the computed measures. The strength of the MATS toolkit is the simultaneous operation on both multiple time series and multiple measures, allowing a range of measure specific parameters to be set as well. Help for any action is provided in html.
- Publisher: Dimitris Kugiumtzis
- Date: 18-01-2013
- Size: 3492 KB
- Platform: Matlab, Scripts
- secant method in nonlinear ode
- License: Freeware

this will find the solution of U''=k*U*U' by using taylor series 3rd order and secant method it gives an idea about the nonlinear ode method and also gives the idea of solving problem in matlab.
- Publisher: Kalyan Bhattacharjee
- Date: 10-04-2013
- Size: 10 KB
- Platform: Matlab, Scripts
- Pulse Propagation in Nonlinear Media(GUI Based Application)
- License: Freeware

This gui based application incorporates all aspects of pulse propagation in Nonlinear media.It uses the master equation for pulse propagation under slow varying envelop approximation known as General Nonlinear Schroedinger equation.This helps you simulate propagation of chirped or non-chirped super-gaussian and hyperbolic-secant pulses in any medium or multiple media placed in succession. The application has two modules.First one helps you analyse the input pulses.One can load different pulses whose temporal and spectral width gets displayed against them in the list provided.The second module helps you choose from the loaded pulse and select the media.
- Publisher: Vishal Kumar Vaibhav
- Date: 22-01-2013
- Size: 20 KB
- Platform: Matlab, Scripts
- LMFnlsq - Solution of nonlinear least squares
- License: Freeware

The function The LMFnlsq.m serves for finding optimal solution of an overdetermined system of nonlinear equations in the least-squares sense. The standard Levenberg- Marquardt algorithm was modified by Fletcher and coded in FORTRAN many years ago (see the Reference). This version of LMFnlsq is its complete MATLAB implementation complemented by setting parameters of iterations as options. This part of the code has been strongly influenced by Duane Hanselman's function mmfsolve.m. Calling of the function is rather simple and is one of the following: LMFnlsq % for help output x = LMFnlsq(Eqns,X0); x = LMFnlsq(Eqns,X0); x = LMFnlsq(Eqns,X0); x = LMFnlsq(Eqns,X0,'Name',Value,.
- Publisher: Miroslav Balda
- Date: 05-06-2013
- Size: 870 KB
- Platform: Matlab, Scripts
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