[Ipopt] Lagrange multipliers during iterations using Ipopt

[Antonello L.]

sorry, I didn't read that you need it **during iterations**..
Jump provides solver callbacks, but I am not sure you can use them in
nonlinear programming nor to extract lagrangian values..

On 14 May 2017 9:39 p.m., "Antonello Lobianco" <antonello at lobianco.org>
wrote:

> You could access IPOPT using Jump <http://jump.readthedocs.io/en/latest/>
> instead of Matlab and get the lagrangian with getdual([constraint name]).
> Antonello
>
> On 14 May 2017 at 11:34, Àlex Ferrer <aferrer at cimne.upc.edu> wrote:
>
>> Hi everyone,
>>
>> I am using Ipopt via the Matlab interface for solving my optimization
>> problem.
>>
>> I need to know the values of the Lagrange multipliers during iterations
>> and I could not find a way to get them from Ipopt.
>>
>> I was wondering if someone could help me with this.
>>
>> Thank you in advance,
>>
>> Àlex
>>
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>
> --
> Antonello Lobianco
> AgroParisTech, Laboratoire d'Economie Forestière
> 14 Rue Girardet - 54000 Nancy, France
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> Email, university: antonello.lobianco at inra.fr
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