Re: [Help-glpk] QUESTION ABOUT GLPK
I would like to know if it is possible to implement more than one objective function at the same time. I've revised the manual that is on the web, and I've found that the simplex method uses LU factorization to solve optimization problems working out with an objective function. Do you know if there is any possibility to join more than one objective functions by means of factorization or another kind of method? Your question is not clear. If you need to estimate constraints for additional objectives, you could introduce them into the instance as free rows, i.e. as rows having no lower/upper bounds, and then compute correspodning rows of the simplex table with glp_eval_tab_row at optimal point that would give you reduced costs of the additional objectives. In any case the simplex method assumes only one objective function. ___ Help-glpk mailing list Help-glpk@gnu.org http://lists.gnu.org/mailman/listinfo/help-glpk
Re: [Help-glpk]question about GLPK API
it works! thanks for your quick response! 2009/5/25 Andrew Makhorin m...@gnu.org i have a question that can i get the value of Marginal column of the result through the GLPK API? how can i get it? my GLPK is 4.34 (for windows) glp_get_row_dual and glp_get_col_dual -- 刘博 ___ Help-glpk mailing list Help-glpk@gnu.org http://lists.gnu.org/mailman/listinfo/help-glpk
RE: [Help-glpk] Question about GLPK
Here, at the University of Chile, we are interested in developing some optimization rutines for various engineering problems. I understand that GLPK (linear programming rutine) comes with an API for C, C++ written language programs ¿exclusively? Does this GLPK run (or complie) under pure LINUX? Is it possible to implement in Java written programs? Sorry, the link was not working for this. http://rpmfind.net//linux/RPM/cooker/2006.0/i586/media/contrib/python-glpk-0.4-2mdk.i586.html This is the one you should be downloading. http://rpm.pbone.net/index.php3?stat=26dist=17size=14146name=python-glpk-0.4-2mdk.src.rpm python-glpk-0.4-2mdk.src.rpm has this glpk.i. * In src rpm, there is glpk.i which you can use to create java bindings for * glpk. Hence, you can write program in java. Or you can use python-glpk and * use jython for java application, if you don't want to create java-glpk * http://www.jython.org/ Noli ___ Help-glpk mailing list Help-glpk@gnu.org http://lists.gnu.org/mailman/listinfo/help-glpk
RE: [Help-glpk] Question about GLPK
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Friday, 12 August 2005 7:06 AM To: help-glpk@gnu.org Subject: Re: [Help-glpk] Question about GLPK On Thursday 11 August 2005 21:01, Frank Leañez wrote: Is it possible to implement in Java written programs? I don't know nothing about Java (I seem to recall that the Java interface is now maintained separately from GLPK), but here http://qosip.tmit.bme.hu/~retvari/Math-GLPK.html I downloaded Math-GLPK-Solve-0.05.tar.gz from http://qosip.tmit.bme.hu/~retvari/perl-modules/ and have a look what is inside. Gabor, use SWIG as well. Hence, you can use glpk.i, etc. files to make java-glpk bindings. Noli ___ Help-glpk mailing list Help-glpk@gnu.org http://lists.gnu.org/mailman/listinfo/help-glpk
