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Topic: Non-linear optimization
Replies: 32   Last Post: Mar 8, 2013 2:22 AM

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Bruno Luong

Posts: 8,845
Registered: 7/26/08
Re: Non-linear optimization
Posted: Mar 6, 2013 5:31 PM
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"Matt J" wrote in message <kh8dvs$imu$1@newscl01ah.mathworks.com>...

>
> But yes, the above is equivalent to minimizing F(x). That's what we want. Now, however, you can feed f(x) to LSQNONLIN and run its Levenberg-Marquardt routine.


And in what sense this contortion supposes to do any good?

The Gauss-Newton approximation of the square-root will certainly less accurate than working with F directly. Especially when the lower-bound is careless chosen.

Bruno



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