The curve fitting tool won't open when using the cftool command or when clicking on Curve Fitting in Apps. There is also an error message.

That's my code:

xvals = (-20:1:20)';
yvals = xvals.^2;
plot(xvals,yvals,'.','MarkerSize',20)
cftool(xvals,yvals)

Which gives me an error message:

Warning: Error occurred while executing the listener callback for event FitAdded defined for class sftoolgui.FitsManager:

Dot indexing is not supported for variables of this type.

Error in sftoolgui.Figure/addToDesktopGroup

Error in sftoolgui.Figure

Error in sftoolgui.FitFigure (line 59)

this = [e-mail](sftool);

Error in sftoolgui.sftool/fitAdded (line 146)

fitFigure = sftoolgui.FitFigure(h, evt.HFitdev, []);

Error in sftoolgui.sftool>@(s,e)h.fitAdded(e) (line 83)

h.createListener(fm, 'FitAdded', @(s, e) h.fitAdded( e ) );

Error in sftoolgui.FitsManager/newFit (line 35)

notify (this, 'FitAdded', sftoolgui.FitEventData( hFitdev ));

Error in sftool_v1 (line 72)

h.HFitsManager.newFit( data );

Error in cftool>iStartSFTOOL (line 51)

application = sftool_v1( varaibles, names );

Error in cftool (line 41)

theApplication = iStartSFTOOL( varargin, names );

Error in LiveEditorEvaluationHelperE1999554706 (line 8)

cftool(xvals,yvals)

Error in matlab.internal.editor.evaluateRegions

Error in matlab.internal.editor.EvaluationOutputsService.evalRegions

Strangely, when I use the command f=fit(xvals,yvals,'poly2') it works. Why does the curve fitting toolbox doesn't open?

Answer 1

[Priyanshu Mishra]

Hi Luca,

It seems you have used script name as any of the MATLAB function. Try to rename the script (other than MATLAB keyword) and run it again.

[Alanood Alshehhi]

how to do that