nonlinear curve-fitting: weight vector

2012 2 21
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更新时间：2018 1 22
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hi I am working on a multiobjective procedure using the 'lsqcurvefit' (Levenberg-Marquardt algorithm): I would like to use a weight vector during risolution of the best fit in order to force the best fit function following the last inputs in a better way instead of the first ones. How can I?

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Richard Willey
Richard Willey 2012-2-21

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nlinfit in Statistics Toolbox
  1. Uses Levenberg-Marquardt under the hood
  2. Allows you to input a vector of weights
See http://www.mathworks.com/help/toolbox/stats/nlinfit.html

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Tom Lane
Tom Lane 2012-2-21
编辑：Tom Lane 2018-1-22
The use of weights is actually not supported directly in nlinfit, but there is a demo about how to do that. You might use the same technique with lsqcurvefit if you prefer.
https://www.mathworks.com/help/stats/examples/weighted-nonlinear-regression.html
anna
anna 2012-2-22
Dear guys,
many many thanks for your reply.
It works perfectly!!!
I have modified my script by using the same technique reported in the last link for the “nlinfit”.

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