Is it possible to specify the upper and lower bounds for the coefficients when using the fitting function NLINFIT in the Statistic Toolbox?

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I would like to be able to specify the upper and lower bounds for coefficients in the NLINFIT function.

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 18 Oct 2013
The ability to specify the upper and lower bounds for coefficients in the NLINFIT function is not available in the Statistics Toolbox.
To work around this issue one can consider using the LSQCURVEFIT function in the Optimization Toolbox. The LSQCURVEFIT does not offer the exact same capabilities, for example: LSQCURVEFIT does not allow using a 'Weight function' like NLINFIT as an input, however, one can manually customize the objective function to include this information.

More Answers (1)

Ankit Labh
Ankit Labh on 3 Feb 2020
Hi,
May I just ask if thereis any update on eith of LSQCURVEFIT or NLINFIT(or FITNLM) which incorporatates both parater boundation and weight?
Thanks.

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