<div dir="auto">sorry, I didn't read that you need it **during iterations**..<div dir="auto">Jump provides solver callbacks, but I am not sure you can use them in nonlinear programming nor to extract lagrangian values..</div></div><div class="gmail_extra"><br><div class="gmail_quote">On 14 May 2017 9:39 p.m., "Antonello Lobianco" <<a href="mailto:antonello@lobianco.org">antonello@lobianco.org</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>You could access IPOPT using <a href="http://jump.readthedocs.io/en/latest/" target="_blank">Jump</a> instead of Matlab and get the lagrangian with getdual([constraint name]).<br></div>Antonello<br><div class="gmail_extra"><br><div class="gmail_quote">On 14 May 2017 at 11:34, Àlex Ferrer <span dir="ltr"><<a href="mailto:aferrer@cimne.upc.edu" target="_blank">aferrer@cimne.upc.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi everyone,<br>
<br>
I am using Ipopt via the Matlab interface for solving my optimization problem.<br>
<br>
I need to know the values of the Lagrange multipliers during iterations and I could not find a way to get them from Ipopt.<br>
<br>
I was wondering if someone could help me with this.<br>
<br>
Thank you in advance,<br>
<br>
Àlex<br>
<br>
______________________________<wbr>_________________<br>
Ipopt mailing list<br>
<a href="mailto:Ipopt@list.coin-or.org" target="_blank">Ipopt@list.coin-or.org</a><br>
<a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__list.coin-2Dor.org_mailman_listinfo_ipopt&d=DwIGaQ&c=Ngd-ta5yRYsqeUsEDgxhcqsYYY1Xs5ogLxWPA_2Wlc4&r=8oTnxj08sd2ffhbFEprcyo6DDTVDvo_DCJ2aU6CdYWE&m=1jOELYmw264NINGn1HEz2upD-LjqU5T1BFjnufFgTtQ&s=u-hPWd-wE0VwNG492NzItoGXa1vTGSGwtrREgNROxVs&e=" rel="noreferrer" target="_blank">https://urldefense.proofpoint.<wbr>com/v2/url?u=https-3A__list.co<wbr>in-2Dor.org_mailman_listinfo_i<wbr>popt&d=DwIGaQ&c=Ngd-ta5yRYsqeU<wbr>sEDgxhcqsYYY1Xs5ogLxWPA_2Wlc4&<wbr>r=8oTnxj08sd2ffhbFEprcyo6DDTVD<wbr>vo_DCJ2aU6CdYWE&m=1jOELYmw264N<wbr>INGn1HEz2upD-LjqU5T1BFjnufFgTt<wbr>Q&s=u-hPWd-wE0VwNG492NzItoGXa1<wbr>vTGSGwtrREgNROxVs&e=</a> </blockquote></div><br><br clear="all"><br>-- <br><div class="m_8566417620983721001m_-6838170445233590243gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><span><span>Antonello Lobianco<br>AgroParisTech, Laboratoire d'Economie Forestière<br>14 Rue Girardet - 54000 Nancy, France<br>Tel: <a href="tel:+33%203%2083%2039%2068%2065" value="+33383396865" target="_blank">+33.383396865</a><br>Email, university: <a href="mailto:antonello.lobianco@nancy.inra.fr" target="_blank">antonello.lobianco@inra.fr</a><br>Email, personal: <a href="mailto:antonello@lobianco.org" target="_blank">antonello@lobianco.org</a><br><a href="http://antonello.lobianco.org/" target="_blank">http://antonello.lobianco.org</a></span></span></div></div></div></div></div></div>
</div></div>
</blockquote></div></div>