Hello Ankit There is some information here on prescribed starts in GLPK:
http://en.wikibooks.org/wiki/GLPK/API_usage#Prescribed_starts Note also this posting from the maintainer: http://lists.gnu.org/archive/html/help-glpk/2012-08/msg00035.html Is your desired prescribed start (initialization) for the LP relaxation or for the MIP itself? If the later, it seems you will have to work thru the MIP search tree from scratch? This is outside my area, so perhaps others on the list can advise. Also, if someone want to work up the prescribed starts example (link above), I'd be happy to assist. HTH, Robbie ------------------------------------------------------------ To: Ankit Gandhi <[email protected]>, Subject: Re: [Help-glpk] [Fwd: Specify initialization for MIP] Message-ID: <[email protected]> From: "glpk xypron" <[email protected]> Date: Mon, 10 Sep 2012 07:35:16 +0200 ------------------------------------------------------------ > Dear Ankit, > > In glpk-4.47/doc/glpk.pdf, chapter 5 - Branch-and-Cut > API Routines you will information about the usage of a > callback function to specify a heuristic solution. > > Best regards > > Xypron >> -------- Forwarded Message -------- >> Subject: Specify initialization for MIP >> Date: Mon, 10 Sep 2012 02:10:56 +0530 >> >> Hi, >> I have been trying to solve MIP which contains around 10000 integer >> variables. Well, problem is very large so it is expected that glpk will >> take infinitely huge amount of time. But also, I have good >> initialization for the branch and bound technique used by MIP. Anyone >> having any idea how to specify initialization for the MIP as couldn't >> find in the user's guide ? >> >> Thanks, >> regards, >> Ankit Gandhi --- Robbie Morrison PhD student -- policy-oriented energy system simulation Technical University of Berlin (TU-Berlin), Germany University email (redirected) : [email protected] Webmail (preferred) : [email protected] [from Webmail client] _______________________________________________ Help-glpk mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-glpk
