constrained least square fitting

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Naresh
Naresh 2011-6-19
Hey
I need some help with constrained least squares. I have a vector A(mx1). I need to fit a degree n-polynomial f with a constraint that the f(1)=f(m). I am acquainted with matlab but never done curve fitting and some lead will be great help.
Thanks
  2 个评论
Walter Roberson
Walter Roberson 2011-6-19
How strict does the tolerance have to be on f(1)=f(m) ? If they must be exactly equal, that can be difficult to achieve due to standard round-off error issues.
Naresh
Naresh 2011-6-19
round off errors are ok. I dont need very high precision.

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回答（2 个）

Oleg Komarov
Oleg Komarov 2011-6-19
You can use lsqnonneg or if you have the Optimization TB then Least Squares (Model Fitting) Algorithms
Naresh
Naresh 2011-6-19
fmincon worked.
Thanks for the inputs. (cant use toolbox as such.. need to run several iterations..)

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