Nonlinear Fitting

There is no selection in Curve Fitting Toolbox that the property of the plot could be changed, for example, log plot, loglog plot. This is useful expecially when you are fitting a log or exponential curve. Help included. Platforms: Matlab

The Ezyfit toolbox for Matlab enables the user to perform simple curve fitting of one-dimensional data using arbitrary (non linear) fitting functions.It will add a new menu to the MATLAB interface, which will make it more easily to write ser-defined fit equations, make interactive selections or... Platforms: Matlab

RealPaver is a modeling language for solving mixed-integer nonlinear constraint systems. Platforms: *nix

NLopt is a free/open-source library for nonlinear optimization, providing a common interface for a number of different free optimization routines available online as well as original implementations of various other algorithms. Its features include: * Callable from C, C++, Fortran, GNU Octave,... Platforms: *nix

ODEcalc for Windows: An Ordinary Differential Equation (ODE) Calculator! State your equation and boundary or initial value conditions and it solves your problem. Plots solution y and derivative ydot versus x. Solves most Boundary Value Problems (BVP) and Initial Value Problems (IVP) for... Platforms: Windows, Windows 8, Windows 7, Windows Server

SimplexNumerica is an object-oriented numerical data analyzer, plot and presentation program. SimplexNumerica is proving to be extremely popular among scientists. Ergonomic programming using the newest Windows programming guidelines with toolbars, context dialogs and interactive diagrams... Platforms: Windows

Powerful tool for nonlinear constrained optimization.You have an object, which should be improved by optimum coordination of several parameters, and its mathematical model, computing efficiency index depending on these parameters. Using IOSO NS GT, you can quickly and efficiently solve non-linear... Platforms: Windows

The GLT Chaos screen saver displays interesting patterns based on a nonlinear quadratic iterated function. Platforms: Windows

GMT is an open source collection of ~60 tools for manipulating geographic and Cartesian data sets (including filtering, trend fitting, gridding, projecting, etc.) and producing Encapsulated PostScript File (EPS) illustrations ranging from simple x-y plots via contour maps to artificially... Platforms: *nix

Scrinchy is a tiny HTTP multitasking webserver that I wrote for my own purposes, but which is also a fitting response to the now fairly bloated Apache. Its name derives from an obscure English verb "to scrinch" which generally means to willfully compress a thing which is not very large into a... Platforms: *nix

WDSolve is a black box solver for nonlinear hyperbolic partial differential equations. WDSolve is based on the Wave Digital method, leading to explicit finite difference schemes with superior stability properties. Platforms: Windows

Census is a project manager specially designed for population pharmacokinetic and pharmacodynamic analysis using the nonlinear mixed-effect modelling application NONMEM. NONMEM is a powerful tool that will help you with nonlinear mixed-effect modelling and simulation of pharmacokinetic and... Platforms: Windows

mtpile is a specialized program that has been designed in order to compute the displacements, shear forces, bending moments and soil reactions, allowing for the nonlinear behavior of both the soil and the pile. Now you are offered an accessible and handy tool to calculate displacements. Platforms: Windows

TreeFitter is designed as an accessible and handy application for parsimony-based tree fitting. TreeFitter is a CLi-based tool that can be used for analyzing problems in historical biogeography, coevolution, and in species tree - gene tree fitting. Platforms: Windows

A powerful combination of basic biostatistics, curve fitting and scientific graphing in one comprehensive program. More than 100,000 scientists in over 100 countries rely on Prism to analyze, graph and present their scientific data. What makes Prism the program of choice for many of the world's... Platforms: Mac

A modern, interactive, Mac OS X Universal graphing application, providing: - A rich variety of graph types with numerous styles of data representation - Real-time, two-way interaction with data, enabling simultaneous data visualization and graphing from multiple worksheets - Exploratory tools... Platforms: Mac

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... Platforms: Windows

The DynaFit application was developed to perform nonlinear least-squares regression of chemical kinetic, enzyme kinetic, or ligand-receptor binding data. The experimental data can be either initial reaction velocities in dependence on the concentration of varied species (e.g., inhibitor... Platforms: Windows

The CDN WinTool allows the fitting of many important Windows settings which would be modifiable, otherwise, only complex about the Registry. Many of these options make your everyday work with the system quicker, lighter, more sure and more individual. The areas covered by the CDN WinTool enclose... Platforms: Windows

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 numerical code is called NLPQL, which is... Platforms: Windows