[Ipopt] Lagrange multipliers during iterations using Ipopt

[Alex Ferrer]

Yes, I need to know the values of the Lagrange multipliers during 
iterations. Does Ipopt (independetly of using Matlab) provide them?

Thanks,

Àlex


On 14/05/17 22:25, Antonello L. wrote:
> 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 
> <mailto: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
>     <mailto: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
>     Tel: +33.383396865 <tel:+33%203%2083%2039%2068%2065>
>     Email, university: antonello.lobianco at inra.fr
>     <mailto:antonello.lobianco at nancy.inra.fr>
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>     <mailto:antonello at lobianco.org>
>     http://antonello.lobianco.org <http://antonello.lobianco.org/>
>

-- 
Alex Ferrer
/Ph.D. candidate student, M.Sc. Aeronautical Engineering/
*CIMNE*
a: 	Building C1 Campus Nord UPC C/ Gran Capità, S/N 08034 Barcelona, Spain
w: 	www.cimne.com/ <http://www.cimne.com/> e: aferrer at cimne.upc.edu 
<mailto:aferrer at cimne.upc.edu>

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