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Topic: Curve fitting toolbox (Failure in initial user-supplied objective function evaluation)
Replies: 1   Last Post: Feb 28, 2013 4:17 AM

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kees de kapper

Posts: 71
Registered: 12/7/04
Curve fitting toolbox (Failure in initial user-supplied objective function evaluation)
Posted: Feb 28, 2013 4:09 AM
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Hi All,

a very silly question I suppose. What am I doing wrong?

X = (1:1829)';
P = 0.01*(X-923).^2 + 0.03;
opts = fitoptions('Method','NonlinearLeastSquares', 'Startpoint',[0]);
f = fittype('a*(x-923).^2+b','options',opts);
[fmodel,gof] = fit(X, P, f);

I get this error message:
||||Error using fit>iFit (line 415)
||||Not enough inputs to FITTYPE function.
||||
||||Error in fit (line 109)
||||[fitobj, goodness, output, convmsg] = iFit( xdatain, ydatain, fittypeobj, ...
||||
||||Caused by:
|||| Failure in initial user-supplied objective function evaluation. LSQCURVEFIT cannot continue.
||||
||||24 throwAsCaller( anException );

Many thanks in advance for your considerations.



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