MATLAB Answers


Try using or tightening upper and lower bounds on coefficients.

Asked by ali alsabari on 25 Aug 2019
Latest activity Answered by Bjorn Gustavsson on 26 Aug 2019
please i need your help the attatched file is my data and i want to do matlab curve fittining using custom equation:
i got error as in the title the values in the equation based on knowledge from data itself as paramters that already know and i want to know the other coffecient of the equation .. i have tried many methods and reducing using different algorithm using command but i still get an error please help me with this

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Please refer to this.

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1 Answer

Answer by Bjorn Gustavsson on 26 Aug 2019

For arbitrary fitting tasks I personally prefer to use weighted least-square minimization using some optimization function,
if lsqnonlin doesn't work for you you could try the file exchange contributions: fminsearchbnd, minimize. That way I have more direct control of what is done.


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