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GUI for Generalized Nonlinear Non-analytic Chi-Square Fitting

version 1.0 (255 KB) by

Provides a Curve Fitting Toolbox-like interface for chi-square fitting



No License

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).

Comments and Ratings (6)


I am new user of Matlab. I will be very grateful if someone can let me know how I can install this tool. I have extracted the zip file but cannot find a way of making Matlab recongnise the tool.
Thank you in advance


Sourin (view profile)

Nice tool, please provide how to edit function library.

J West

J West (view profile)

The help page for FitChiTool is very useful indeed. Please can you provide some similar documentation or perhaps even a tutorial for the ModelEditor? This would make the whole package dramatically more user-friendly, and broadly useful.

Many thanks.

sandip paul

I was trying to open the GUI, but encountered following error
>> FitChiTool
??? Error: File: C:\FitChiTool\FitChiTool.m Line: 61 Column: 12
Expected a variable, function, or constant, found "&".


Very good tool. Looking forward to more functions in the future release, such as selecting range of data to fit.

shx chen

??? Index exceeds matrix dimensions.

Error in ==> ModelEditor>ModelEditor_OpeningFcn at 62
if nargin && ischar(varargin{1})

Error in ==> gui_mainfcn at 166
feval(gui_State.gui_OpeningFcn, gui_hFigure, [], guidata(gui_hFigure), varargin{:});

Error in ==> ModelEditor at 43
gui_mainfcn(gui_State, varargin{:});

MATLAB Release
MATLAB 7.1.0 (R14SP3)

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