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Thread Subject:
lsqnonlin function

Subject: lsqnonlin function

From: Toan Cao

Date: 16 May, 2013 21:06:09

Message: 1 of 3

Hello everyone,

I am using "lsqnonlin" function for optimization. In this function, i solve the problem with Levenberg-Marquard algorithm. In order to terminate the optimization process, TolFun and TolX criteria are used. However, I do not know how TolFun and TolX are computed for Levenberg-Marquardt algorithm ? Are they computed using 2-norm ? Are they absolute or relative criteria ?
Can you give me answer ? Thanks in advance!

Toan

Subject: lsqnonlin function

From: Toan Cao

Date: 20 May, 2013 13:54:09

Message: 2 of 3

"Toan Cao" <toancv3010@gmail.com> wrote in message <kn3ho0$ph2$1@newscl01ah.mathworks.com>...
> Hello everyone,
>
> I am using "lsqnonlin" function for optimization. In this function, i solve the problem with Levenberg-Marquard algorithm. In order to terminate the optimization process, TolFun and TolX criteria are used. However, I do not know how TolFun and TolX are computed for Levenberg-Marquardt algorithm ? Are they computed using 2-norm ? Are they absolute or relative criteria ?
> Can you give me answer ? Thanks in advance!

Hix, no one can give me the answer !?

Subject: lsqnonlin function

From: Steven_Lord

Date: 20 May, 2013 15:01:59

Message: 3 of 3



"Toan Cao" <toancv3010@gmail.com> wrote in message
news:knd9u1$lc1$1@newscl01ah.mathworks.com...
> "Toan Cao" <toancv3010@gmail.com> wrote in message
> <kn3ho0$ph2$1@newscl01ah.mathworks.com>...
>> Hello everyone,
>>
>> I am using "lsqnonlin" function for optimization. In this function, i
>> solve the problem with Levenberg-Marquard algorithm. In order to
>> terminate the optimization process, TolFun and TolX criteria are used.
>> However, I do not know how TolFun and TolX are computed for
>> Levenberg-Marquardt algorithm ? Are they computed using 2-norm ? Are they
>> absolute or relative criteria ?
>> Can you give me answer ? Thanks in advance!
>
> Hix, no one can give me the answer !?

http://www.mathworks.com/help/optim/ug/tolerances-and-stopping-criteria.html

--
Steve Lord
slord@mathworks.com
To contact Technical Support use the Contact Us link on
http://www.mathworks.com

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