# Software Listing: Nonlinear Curve Fit

**Auto2Fit**- License: Shareware
- Price: 149

Auto2Fit is a robust, flexible, easiest-to-use regression, curve fit, global optimization, equation solving and parameter estimation program by using Evolution Algorithms (EAs). It is especially useful for the complicated jobs that are hard or impossible to be solved by regular/traditional approaches. Application Areas: Auto2Fit can be used in the areas such as: 1. Regression and Curve Fit: linear, nonlinear, multi-nonlinear with no limitations on variable and parameter number 2. Global Optimization: find the maximal/minimal value of any function. The function may be nonlinear, non-continues, non derivable.

**Publisher:**CPC-X Software**Date:**15-04-2004**Size:**1950 KB

**Platform:**Win2000, WinOther

**Data Curve Fit Creator Add-in**- License: Shareware
- Price: 79.95

Data Curve Fit Creator Add-in is an easy-to-use data analysis add-in for Microsoft Excel. It adds curve fitting, interpolation, and data smoothing functions to Excel. Curve fitting functions include polynomial fits and a versatile local regression (loess) function. Interpolations include linear, cubic spline, bessel and monotonic \'constrained\' splines, as well as a \'flexible spline\' that allows you to specify the slope at each data point. Cubic spline function coefficients and slope can also be returned. Data smoothing functions include moving average, median filter, and a Gaussian smoothing filter.

**Publisher:**SRS1 Software, LLC**Date:**11-05-2018**Size:**7087 KB

**Platform:**Win2000, WinXP, Win7 x32, Win7 x64, Windows 8, Windows 10, WinServer, WinOther, Windows2000, Windows2003, Windows Server 2012, Windows Tablet PC Edition 2005, Windows Media Center Edition 2005, WinVista, Windows Vista, WinVista x64

**Sicyon Lite calculator**- License: Freeware
- Price: 0.00

Sicyon is all-in-one freeware tool for every researcher and engineer. The core of Sicyon is an expression (VBScript/JScript) calculator with features as: estimate a function using variables, user-defined functions and Sicyon objects; plot/tabulate a function; solve an equation, minimums, maximums and definite integral of a function; fit a function over data set; sophisticated units converter; database reader with various physical and chemical constants; matrix operations; set of plugin tools.

Features:

- calculate the value of a math expression using variables and user-defined functions.

**Publisher:**SpecLabs**Date:**19-02-2006**Size:**5020 KB

**Platform:**Win2000, Windows Server, WinOther

**Visual Fitting**- License: Shareware
- Price: 80

Math tool for linear, nonlinear curve fitting and surface fitting. 1. Implement curve fitting and graphing of linear models and nonlinear models. 2. Implement surface fitting and graphing of any binary function models. 3. 4d data fitting and graphing. 4. Polynomial fitting and graphing. 5. Excel-like data editor is easy to use. 6. Ability to move, zoom in, zoom out and rotate the graphs in plot area. 7. Ability to save graphs as bmp file..

**Publisher:**GraphNow**Date:**21-09-2013**Size:**2500 KB

**Platform:**Win2000, Win7 x32, Win7 x64, Windows Server, WinOther, WinVista, WinVista x64

**CHEMIX School**- License: Shareware
- Price: 19

CHEMIX School is an educational tool for learning chemistry. It is geared toward college-level chemistry, but is also appropriate for high-school students, chemists, and teachers. It is equipped with a periodic table containing history, 19 physical properties + number of stable isotopes, abundance, atomic mass, spin, resonance frequencies, relative receptivity, magnetic moment, quadropole moment and magnetogyric ratio for all stable isotopes. Also included are physical properties of more than 2500 unstable isotopes such as: atomic mass, half-life, decay modes, decay energy, particle energy, particle intensities,spin and magnetic moment including decay trees for 600 decays.

**Publisher:**Arne Standnes**Date:**26-05-2017**Size:**1482 KB

**Platform:**Win2000, WinXP, Win7 x32, Win7 x64, Windows 8, Windows 10, WinServer, WinOther, WinVista, WinVista x64

**DataFitting**- License: Shareware
- Price: 15.00

DataFitting is a powerful statistical analysis program that performs linear and nonlinear regression analysis (i.e. curve fitting). DataFitting determines the values of parameters for an equation, whose form you specify, that cause the equation to best fit a set of data values. DataFitting can handle linear, polynomial, exponential, and general nonlinear functions. DataFitting performs true nonlinear regression analysis, it does not transform the function into a linear form. As a result, it can handle functions that are impossible to linearize such as: y = (a - c) * exp(-b * x) + c Quickly Find the Best Equations that Describe Your Data: DataFitting gives students, teachers, engineers, researchers and other professionals the power to find the ideal model for even the most complex data, by putting a large number of equations at...

**Publisher:**Institute of Mathematics and Statistics**Date:**11-04-2015**Size:**2990 KB

**Platform:**Win2000, Win7 x32, Win98, WinOther, WinVista, WinXP, Other

**Weighted Nonlinear Curve Fit Script with Plotter**- License: Shareware

This weighted nonlinear fit script fulfills the requirements of physicists, chemists and other quantative scientists, who need a fitting script for the everyday use. This script fits and creates nice plots with results and data automatically printed in a legend. It saves much time compared to using origin or other fitting programs. It uses built in minimization routines to obtain the best guess for the fit variables. The error is determined by adding some value x (depending on how many variables are fitted) to the minimum chi^2 value and finding the value of the respective fitting variable so that chi^2 is equal to min(chi^2)+x.

**Publisher:**Jannick**Date:**15-02-2013**Size:**10 KB

**Platform:**Matlab, Scripts

**Regression Analysis - CurveFitter**- License: Shareware
- Price: 15.00

CurveFitter program performs statistical regression analysis to estimate the values of parameters for linear, multivariate, polynomial, exponential and nonlinear functions. The regression analysis determines the values of the parameters that cause the function to best fit the observed data that you provide. This process is also called curve fitting. Fit thousands of data into your equations in seconds: Curvefitter gives scientists, researchers and engineers the power to find the ideal model for even the most complex data, including equations that might never have been considered. You can build equation set which can include a wide array of linear and nonlinear models for any application.

**Publisher:**Institute of Mathematics and Statistics**Date:**07-07-2013**Size:**3148 KB

**Platform:**Win2000, Win7 x32, WinOther, WinVista

**Regression Analysis - DataFitting**- License: Shareware
- Price: 15.00

DataFitting is a powerful statistical analysis program that performs linear and nonlinear regression analysis (i.e. curve fitting). DataFitting determines the values of parameters for an equation, whose form you specify, that cause the equation to best fit a set of data values. DataFitting can handle linear, polynomial, exponential, and general nonlinear functions.

DataFitting performs true nonlinear regression analysis, it does not transform the function into a linear form. As a result, it can handle functions that are impossible to linearize such as:

y = (a - c) * exp(-b * x) + c

Quickly Find the Best Equations that Describe Your Data:

DataFitting gives students, teachers, engineers, researchers and other professionals the power to find the ideal model for even the most complex data, by putting...

**Publisher:**Institute of Mathematics and Statistics**Date:****Size:**3010 KB

**Platform:**Win2000, Win7 x32, WinOther, WinVista

**CurveFitter**- License: Shareware
- Price: 15.00

CurveFitter performs statistical regression analysis to estimate the values of parameters for linear, multivariate, polynomial, exponential and nonlinear functions. The regression analysis determines the values of the parameters that cause the function to best fit the observed data that you provide. This process is also called curve fitting. Fit thousands of data into your equations in seconds: CurveFitter gives scientists, researchers and engineers the power to find the ideal model for even the most complex data, including equations that might never have been considered. You can build equation set which can include a wide array of linear and nonlinear models for any application.

**Publisher:**Institute of Mathematics and Statistics**Date:**12-02-2017**Size:**3131 KB

**Platform:**Win2000, Win7 x32, Win7 x64, Win98, WinOther, WinVista, WinVista x64, WinXP, Other

**Fityk for Windows**- License: Freeware
- Price: 0.00

Fityk [fi:tik] is a program for data processing and nonlinear curve fitting.

It is primarily used

* by scientists who analyse data from powder diffraction, chromatography, photoluminescence and photoelectron spectroscopy, infrared and Raman spectroscopy, and other experimental techniques,

* to fit peaks bell-shaped functions (Gaussian, Lorentzian, Voigt, Pearson VII, bifurcated Gaussian, EMG, Doniach-Sunjic, etc.),

but any functions can be fitted to any 2D (x,y) data.

More dlT*

Features

* intuitive graphical interface (and also command line interface),

* support for many data file formats, thanks to the xylib library,

* dozens of built-in functions and support for user-defined functions,

* equality constraints,

* modelling error of the x...

**Publisher:**Marcin Wojdyr**Date:****Size:**3205 KB

**Platform:**WinOther

**Visual Fitting Pro**- License: Shareware

Visual Fitting Pro is a comprehensive and reliable software that helps you to easily implement linear and nonlinear curve fitting.

By using Visual Fitting Pro you have the possibility to create 2D curves in order to visualize the fitting models, move, zoom in or zoom out the graphs in plot area, as well as to save graphs as BMP files.

.

**Publisher:**GraphNow**Date:**

**Platform:**Windows 7, Windows 8, WinOther, WinVista

**DataScene**- License: Shareware
- Price: 219

DataScene is a data graphing, animation, and analysis software package. It allows the user to easily plot 2D & 3D graphs (Area, Bar, Pie, Line, Surface, Ploar, and more) with scientific, financial, and statistical data, to manipulate, print, and export high quality graphs, to analyze data with various mathematical methods (fitting curves, calculating statics, FFT, and more), to create graph animations for presentations, classes, and web pages, and to chart and process real-time data sources. * Plotting 39 types of graphs with brilliant graph quality. * 3D canvas for most graph types. * A wide variety of highly customizable graphical elements: transparent color, solid brush, gradient brush, image brush, hatch brush with 56 textures, shadow, visual aspect settings, etc.

**Publisher:**CyberWit, Inc.**Date:**22-09-2009**Size:**45130 KB

**Platform:**Win2000, Windows Server, Windows Vista, WinOther

**Sicyon**- License: Freeware
- Price: 0.00

Sicyon = expression calculator + constant database + units converter + solver + curve-fit. Sicyon = freeware scientific (VBScript/JScript) calculator + database + units conv. + solver. Sicyon is a freeware sci/eng all-in-one software tool - expression calculator, database, units convertor, solver.

**Publisher:**Teodor Krastev**Date:**20-10-2009**Size:**2969 KB

**Platform:**Win2000, WinOther

**DataScene Lite**- License: Shareware
- Price: 129.00

DataScene Lite is a data graphing and data analysis software package. It allows the user to easily plot brilliant 2D & 3D graphs (Area, Bar, Pie, Line, Surface, Polar, and more) with scientific, financial, and statistical data, to manipulate, print, and export high quality graphs, to analyze data with various mathematical methods (fitting curves, calculating statics, FFT, and more). DataScene Lite is an ideal tool for scientific graphing and office uses. Please check homepage for the feature matrix of different Editions of DatScene. Feature Highlits: * Plotting 39 types of graphs (Area, Bar, Pie, Line, Surface, Polar, and more) with brilliant graph quality.

**Publisher:**CyberWit, Inc.**Date:**02-09-2012**Size:**45128 KB

**Platform:**WinOther

**LAB Fit Curve Fitting Software**- License: Shareware
- Price: 60

LAB Fit is a software for Windows developed for treatment and analysis of experimental data. At LABFit program you are able to: 1) Treat similar data (grouped and ungrouped dataset, one or two samples); 2) Treat non-similar data; 3) Determine propagated error (error propagation up to eight independent variables); 4) Plot 2D and 3D graph (normal, parametric, imported dataset, contour of maps); 5) Execute math calculations (system of linear equations, roots of function, non-linear equation, ordinary differential equation - ODE up to fifth order, system of differential equations - up to five first order ODE, calculator, etc); 6) Extract data (x;y) from a 2D graph (digitizing); 7) Curve Fit (nonlinear regression - least squares method, Levenberg-Marquardt algorithm - with almost 500 functions at the library, with 1 and 2 independent...

**Publisher:**Wilton Pereira da Silva**Date:**22-01-2007**Size:**3398 KB

**Platform:**Unix, Win2000, WinOther

**Easy CurveFit**- License: Shareware
- Price: 39.95

"Easy CurveFit" is a very easy tool to fit curve. Only three steps you should do, and you'll get the fitting curve and the needed parameters. The models include linear and nonlinear. Regressions: 1. Linear Fit, y=a+bx; 2. Quadratic Fit, y=a+bx+cx^2; 3. Compound Fit, y=ab^x; 4. Logatithmic Fit, y=a+b*ln(x); 5. Exponential Fit, y=a*exp(bx); 6. Power Fit, y=a*x^b; 7. Inverse Fit, y=a+b/x; 8. hyperbola Fit, y=ax/(b+x); 9. Geometric Fit, y=ax^(bx); 10. Geometric Fit, y=ax^(b/x);.

**Publisher:**HAN**Date:**13-08-2012**Size:**544 KB

**Platform:**WinOther

**CurveExpert Basic**- License: Shareware
- Price: 45.00

CurveExpert Basic is a comprehensive curve fitting system for Windows. XY data can be modelled using a toolbox of linear regression models, nonlinear regression models, interpolation, or splines. Over 30 models are built-in, but custom regression models may also be defined by the user. Full-featured graphing capability allows thorough examination of the curve fit. The process of finding the best fit can be automated by letting CurveExpert compare your data to each model to choose the best curve. CurveExpert Basic was designed to be simple but powerful, so that all users can obtain a model for their data quickly and easily.

**Publisher:**Daniel G. Hyams**Date:**03-08-2012**Size:**1126 KB

**Platform:**WinOther

**CurveExpert Professional**- License: Shareware
- Price: 70.00

CurveExpert Professional is a cross-platform solution for curve fitting and data analysis. Data can be modelled using a toolbox of linear regression models, nonlinear regression models, smoothing methods, or various kinds of splines. Over 60 models are built-in, but custom regression models may also be defined by the user. Full-featured publication-quality graphing capability allows thorough examination of the curve fit. The process of finding the best fit can be automated by letting CurveExpert compare your data to each model to choose the best curve. The software is designed with the purpose of generating high quality results and output while saving your time in the process.

**Publisher:**Daniel G. Hyams**Date:**25-05-2012**Size:**21299 KB

**Platform:**WinOther

**dose_response**- License: Freeware
- Price: 0.00

Inputs: 1. a 1 dimensional array of drug concentrations 2. the corresponding m x n array of responses Algorithm: generate a set of initial coefficients including the Hill coefficient fit the data to the 4 parameter dose-response curve using nonlinear least squares Output: a matrix of the 4 parameters results[m,1]=min results[m,2]=max results[m,3]=ec50 results[m,4]=Hill coefficient.

**Publisher:**Carlos Evangelista**Date:**07-03-2013**Size:**10 KB

**Platform:**Matlab, Scripts