MATLAB: How to remove the data-type error in lsqcurvefit

Question

Hello,

I am using MATLAB version R2006b.

I have a doubt in the optimization function "LSQCURVEFIT".

I have written the argument in command window as:

S = lsqcurvefit(@optim, kro, Cdata, ydata)

where "S" is a optim function input argument variable as:

function F = optim(S,Cdata);

Please note that both Cdata and ydata that I am supplying are double type arrays.

When I am running the lsqcurvefit command in command window the error that is coming is:

**LSQCURVEFIT cannot continue because user supplied objective function failed with the following error: Undefined function or method 'S' for input arguments of type 'double'.

Error in ==> lsqcurvefit at 182 [x,Resnorm,FVAL,EXITFLAG,OUTPUT,LAMBDA,JACOB] = …**

Please help how should I resolve this issue ?

Answer 1

It looks like the issue might be in the optim function in the use of the input variable S. Can you make a simple call to optim without receiving the error?