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.

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Luca Mastrangelo
Luca Mastrangelo 2020-2-24
评论： Alanood Alshehhi 2022-5-9
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 = this@sftoolgui.Figure(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?

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回答（1 个）

Priyanshu Mishra
Priyanshu Mishra 2020-2-27
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.

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