Generalized Nonlinear Non-analytic Chi-Square Fitting
- Downloads:
- Views:
- Rating:

fitChiSquare is a generalized chi-square fitting routine for any model function when data measurement errors are known; it returns the model parameters and their uncertainties at the delta chi-square = 1 boundary (68% confidence interval). It also returns the chi-square and degrees of freedom (dof) of the fit. The goodness-of-fit may be estimated by comparing chi-square/dof to 1 (<1 is a good fit; >>1 indicates a poor fit). Alternatively, it returns the fit and measurement errors when the model is known - see ErrorUnknown option.
Type "help fitChiSquare" or see the header for usage.
This function calculates the data variance from reported measurement errors, then calculates the chi-square fit. Then the function finds the projection of the delta chi^2 = 1 contour onto each parameter. In the case that the parameter uncertainties are normally distributed, the delta chi^2 = 1 method gives the 68% confidence limit for the parameters. Monte Carlo or investigations of many data sets should be used to confirm the parameter uncertainties are normally distributed.
Note that when used solely as a model fitter, fitChiSquare will generally run more slowly than fminsearch or lsqnonlin. If you are only interested in data optimization, it is recommended that you use one of the built-in functions.
If one encounters the following error message:
Unexpected termination flag 0 in non-estimating variable
minimization during uncertainty estimation
this is because the non-varying parameter minimization routine has encountered its iteration or evaluation limit. Raise UncOptions.MaxFunEvals or UncOptions.MaxIter and try again.
Note: If the user can not use lsqnonlin (i.e., the optimization toolbox is not installed), the program will use the built-in function fminsearch instead. This may reduce the robustness of the calculation.
References:
1. W.H. Press, B.P. Flannery, S.A. Teukolsky, W.T. Vetterling. Numerical Recipes; The Art of Scientific Computing. (Cambridge University Press: Cambridge). 1986.
2. P.R. Bevington, D.K. Robinson. Data Reduction and Error Analysis for the Physical Sciences. (McGraw-Hill: New York). 1992.
Free download from Shareware Connection - fitChiSquare is a generalized chi-square fitting routine for any model function when data measurement errors are known
Version: 1.0 | Size: 41 KB | Platform: Matlab, Scripts
Released Date: 13-05-2013 | Rating: 0 | Title: Generalized Nonlinear Non-analytic Chi-Square Fitting
Author Url: http://www.mathworks.com
Program Info Url: http://www.mathworks.com
Download Url: http://www.mathworks.com/matlabcentral/fx_files/9592/2/fitChiSquare.zip
Fast interpolation - This function performs interpolation faster than MATLAB's "interp1" function
GUI for Generalized Nonlinear Non-analytic Chi-Square Fitting - 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.
Multivalued function interpolation - When interpolating a multivalued function (more than one y for each x)
Fast 2-dimensional interpolation - This function performs 2-dimensional interpolation similar to MATLAB's built-in function interp2 with a considerable speed advantage.
loadOptions - Often one desires to write a function that takes a large number of optional arguments
SimpleTest
WordPress Auto Poster Plugin
Professional Simulink Audio Equalizer
PHP Print / Echo
Ends Smart Form
Output buffering, and how it can change your life
ScriptCase - PHP Code Generator
Advanced Istaller for Java
Wind Turbine Model
FORMfields - The PHP Framework
C to C++ Converter
C++ Compiler
RTFGen - the PHP RTF generator
Cumulative Mann-Kendall trend test
Affiliate Programs
Animation
Auctions
Audio Systems
Banner Rotation
Blog
Bulletin Boards & Forums
Business & Enterprise
Buttons
Calendars & Events
Charts & Graphs
Chat
Classified Ad Managers
Communication
Harmonic Distortion Measurement Vhdl Routine
Nonlinear Function Curve Fitting
Window Api Square Function
Data Generation Routine
Freeware Data Fitting
GUI for Generalized Nonlinear Non-analytic Chi-Square Fitting - 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.
StatFi 2007 - StatFi is a highly affordable statistical package that brings complex statistical and analytical calculations into Microsoft Excel. Unlike the functions that are built into Excel, StatFi provides reliable, repeatable results of the data analysis.
StatFi 2008 - StatFi is a highly affordable statistical package that brings complex statistical and analytical calculations into Microsoft Excel. Unlike the functions that are built into Excel, StatFi provides reliable, repeatable results of the data analysis.
LAB Fit Curve Fitting Software - Curve fitting (fit), nonlinear regression, treatment of data, basic statistics, error propagation, 2D and 3D graphs, confidence band, uncertainty, error bars, extrapolation, chi-square, correlation coefficient tests, covariance matrix, math tools.
Durbin - In the analysis of designed experiments, the Friedman test is the most common non-parametric test for complete block designs.
Shareware Connection periodically updates pricing and software information of 'Generalized Nonlinear Non-analytic Chi-Square Fitting' from company source 'Nathaniel Brahms' , so some information may be slightly out-of-date. You should confirm all information before relying on it. Software piracy is theft, Using 'Generalized Nonlinear Non-analytic Chi-Square Fitting' crack, password, serial numbers, registration codes, key generators is illegal and prevent future development of Generalized Nonlinear Non-analytic Chi-Square Fitting.
SlimCleaner - Nearly all PC users need to use various utilities to enhance performance of their laptop or desktop from time to time. Windows inbuilt utilities can serve the purpose but when you can find more capable third party apps at low or zero cost, why ...
CyberGhost VPN - There are so many ways available to browse the web nowadays. You can use a plethora of devices and pick from various service providers to get online. However, tech savvy users resort to additional measures to access the internet without being ...
PureSync Personal - When you use computers, there is no way you can escape using specialized third party software. These need to be used for various needs including office productivity, web access, taking back-up and ensuring proper synchronization across multiple ...
Plants vs. Zombies 2 - These days there are lot of tower defense games on offer. Coming from the stable of Electronics Arts, which is one of the leading companies in the gaming arena, Plant vs. Zombies is a decent game particularly if you are interested in garden ...
Menu Uninstaller Ultra - For every Windows user it becomes necessary to remove some programs after prolonged usage. It can be necessary to free up disk space or the app may not simply suit the needs any more. Whatever is the reason, you need to uninstall third party apps ...
Skitch - Skitch is a user friendly and lightweight image capturing app for OS X that has been in the scene for quite some time. After its purchase by Evernote, the nifty Mac screen-capture tool has undergone some changes. You can still perform tasks with ...
HWiNFO32 - While Windows ships with its inbuilt utilities and there are command prompts to diagnose hardware and software components, these may not be feasible for all users. To learn about exact hardware and software configuration in a computer, either ...
Norton Security with Backup - Symantec is an old time player in PC security and its various security suites with Norton brand name are used all over the world. With time, Norton security apps have been tweaked to consume fewer resources and they come with several bells and ...
PC Wizard 2012 - Average computer users use their laptops and desktops to run productivity applications, watch movies, browse web and perform other computing needs. However, seasoned users think beyond these and they need to find out in depth information about ...
Windows Live Family Safety - Using parental control applications has become a necessity for those people who have tech savvy kids and computers at home. In fact, you should use such software even if your kid is not tech savvy. Needless to say, children depend on internet for ...
