fit function - Incorrect number or types of inputs or outputs for function fit.

I'm trying to fit data into a function, and it was failing. So to understand it, it've tried the matlab example, and it give me the same error:

Incorrect number or types of inputs or outputs for function fit.

So i'm a bit lost because even the example is failing...

[Stephen23]

Please show us the output of this command:

which fit -all

/MATLAB/toolbox/curvefit/curvefit/fit.m
/MATLAB/toolbox/mbc/mbcdesign/@contwostage/fit.m   % contwostage method
/MATLAB/toolbox/mbc/mbcdesign/@conbase/fit.m       % conbase method
/MATLAB/toolbox/mbc/mbcdesign/@conswitch/fit.m     % conswitch method
/MATLAB/toolbox/mbc/mbcmodels/@localmod/fit.m      % localmod method
/MATLAB/toolbox/mbc/mbcmodels/@localmulti/fit.m    % localmulti method
/MATLAB/toolbox/mbc/mbcmodels/@xregmodel/fit.m     % xregmodel method
/MATLAB/toolbox/stats/stats/@gmdistribution/fit.m  % gmdistribution method

Also: tell us what MATLAB version you are using, and whether you have a license for the Curve Fitting Toolbox.

[Kevin]

Hi Stephen, thanks for answering first.So here's what i got from the cmd. For the Curve Fitting Toolbox, i've asked for a trial last week, so i expect it to be fine. I'm on 2024b.

Answer 1

[Stephen23]

@Kevin: you do not have FIT from the Curve Fitting Toolbox listed. Check your licenses online:

https://www.mathworks.com/help/matlab/matlab_env/manage-your-licenses.html

[Kevin]

Hi Stephen, thanks for noticing. I must had made a mistake as i thought i downloaded it. Thanks, and sorry for the disturbance.