> i already solve a problem with glpk, but i want to validate it with > calculate the objective function in excel > but i have the different value between objective function in glpk and > excel. > glpk's objective function was 1805582104 , but if i calculate it with > excel it was 1838084829 > hereby i attached my problem, thanks in advance >
I converted your instance to mps format and posted it to the neos server to solve with gurobi: http://www.neos-server.org/neos/solvers/milp:Gurobi/MPS.html ---------- Begin Solver Output ----------- Executing /opt/neos/Drivers/gurobi/gurobi-mps-wrapper-driver.py at time: 2012-09-02 15:58:10.870839 Load Avg: ( 1.0 , 1.0 , 1.0 ) Read MPS format model from file model.mps Reading time = 0.01 seconds sensitiv: 680 rows, 1140 columns, 3586 nonzeros Changed value of parameter Threads to 4 Prev: 0 Min: -1 Max: 12 Default: 0 Optimize a model with 680 rows, 1140 columns and 3586 nonzeros Presolve removed 467 rows and 861 columns Presolve time: 0.03s Presolved: 213 rows, 279 columns, 841 nonzeros Variable types: 0 continuous, 279 integer (0 binary) Root relaxation: objective -1.805582e+09, 234 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 -1.806e+09 0 13 - -1.806e+09 - - 0s H 0 0 -1.80536e+09 -1.806e+09 0.01% - 0s H 0 0 -1.80558e+09 -1.806e+09 0.0% - 0s Cutting planes: Mod-K: 1 Explored 0 nodes (257 simplex iterations) in 0.06 seconds Thread count was 4 (of 12 available processors) Optimal solution found (tolerance 1.00e-04) Best objective -1.805582103655e+09, best bound -1.805582103655e+09, gap 0.0% Optimal objective: -1805582103.66 _______________________________________________ Help-glpk mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-glpk
