CFTool fitting fails -- Undefined function or variable 'cfit'

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Stephanie D
Stephanie D 2012-9-16
评论： Nanje Gowda Appanna 2022-6-22
I am trying to fit my data using the cftool GUI. I am able to load data, but when I hit fitting and click "new fit" I get this error:
??? Undefined function or variable 'cfit'.
Error in ==> cftool.fit.constructorhelper at 16 h.fit=cfit;
Error in ==> cftool.fit.fit at 16 h = constructorhelper(cftool.fit,varargin{:});
Error in ==> cftoolnewfit at 7 hFit = cftool.fit;
Error in ==> cfswitchyard at 14 [varargout{1:nargout}]=feval(action,varargin{:});
MATLAB Listener error in Fitting.
I just bought this toolbox (I have R2011a) and I was loading my own data, but then I just attempted with an example provided by matlab (load census) and it still does not work.
I tried to follow this thread: http://www.mathworks.com/matlabcentral/newsreader/view_thread/170613
but it doesn't work for me. Or if someone has a more detailed answer to that solution maybe that would help.
Any suggestions would help.
Stephanie
  1 个评论
Star Strider
Star Strider 2012-9-17
I suggest you look through Download, Installation, Activation & Startup Troubleshooting, or if that doesn't solve your problem, contact MathWorks Support. It seems likely that something went wrong in your installation process, since some of Curve Fitting Toolbox functions show up and others don't.

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回答（1 个）

Stephanie D
Stephanie D 2012-9-18
编辑：Stephanie D 2012-9-18
So to answer my own question in case this happens to anyone else... it was an issue with my installation/setup.
I was setting the path to only the curvefit/cftoolgiu folder after inital installation, so I think what was going wrong was that I wasn't doing all the subfolders of the curvefit toolbox--
under file-->set path--> click on "add with subfolders" and then select the curvefit folder (in toolbox folder), click okay. It will do all the subfolders in the curvefit folder. I only included the subfolders in the curvefit folder and removed the inner folders of the subfolders (if that makes sense).
Type "ver" into the main Matlab command line, you should see "Curve Fit toolbox" in your list of toolboxes, which wasn't showing up until after I seemed to fix it.
One thing Matlab doesn't seem to instruct on is that after installing a toolbox, you have to "set path..." to that new toolbox folder to "activate" the toolbox after installation (for those out there who are new to Matlab).
Hopefully this helps to anyone with this error in the future

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