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Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIP
From: |
Noli Sicad |
Subject: |
Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark |
Date: |
Mon, 19 Nov 2012 20:36:01 +1100 |
Hi Andrew,
> When you pass mps to glpsol, the optimization direction is minimization
> by default, so you need to specify the --max option to tell glpsol to
> maximize rather than minimize.
OK. I got it now.
#####
Nolis-MacBook-Pro:Case_Studies nsicad$ glpsol --freemps
TimberHarvestModel_0025p_freemps.mps --max
GLPSOL: GLPK LP/MIP Solver, v4.47
Parameter(s) specified in the command line:
--freemps TimberHarvestModel_0025p_freemps.mps --max
Reading problem data from `TimberHarvestModel_0025p_freemps.mps'...
Problem: TimberHarvestModel_0025p
Objective: Discounted_Net_Value
464 rows, 255 columns, 1421 non-zeros
249 integer variables, all of which are binary
1727 records were read
GLPK Integer Optimizer, v4.47
464 rows, 255 columns, 1421 non-zeros
249 integer variables, all of which are binary
Preprocessing...
418 rows, 255 columns, 1181 non-zeros
249 integer variables, all of which are binary
Scaling...
A: min|aij| = 9.750e-01 max|aij| = 1.022e+04 ratio = 1.048e+04
GM: min|aij| = 4.933e-01 max|aij| = 2.027e+00 ratio = 4.109e+00
EQ: min|aij| = 2.441e-01 max|aij| = 1.000e+00 ratio = 4.097e+00
2N: min|aij| = 1.233e-01 max|aij| = 1.491e+00 ratio = 1.209e+01
Constructing initial basis...
Size of triangular part = 418
Solving LP relaxation...
GLPK Simplex Optimizer, v4.47
418 rows, 255 columns, 1181 non-zeros
* 0: obj = 3.468641975e+03 infeas = 0.000e+00 (0)
* 205: obj = 3.501953549e+05 infeas = 0.000e+00 (0)
OPTIMAL SOLUTION FOUND
Integer optimization begins...
+ 205: mip = not found yet <= +inf (1; 0)
+ 8941: >>>>> 3.085164198e+05 <= 3.487251184e+05 13.0% (1247; 46)
+ 20699: >>>>> 3.357080247e+05 <= 3.485231119e+05 3.8% (2973; 127)
+ 64121: mip = 3.357080247e+05 <= 3.479684199e+05 3.7% (8936; 1182)
######
Now, I wonder how other solvers would have this maximization option.
Thanks.
Noli
- Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark, (continued)
- Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark, Meketon, Marc, 2012/11/18
- Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark, Andrew Makhorin, 2012/11/18
- Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark, Haroldo Santos, 2012/11/18
Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark, Noli Sicad, 2012/11/18
Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark, Noli Sicad, 2012/11/18
- Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark, Noli Sicad, 2012/11/18
- Message not available
- Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark, Noli Sicad, 2012/11/18
- Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark, Andrew Makhorin, 2012/11/19
- Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark, Noli Sicad, 2012/11/19
- Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark, Andrew Makhorin, 2012/11/19
- Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark,
Noli Sicad <=
- Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark, Noli Sicad, 2012/11/19
Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark, Noli Sicad, 2012/11/19
Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark, Robbie Morrison, 2012/11/19
- Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark, Andrew Makhorin, 2012/11/20
- Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark, Noli Sicad, 2012/11/23
- Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark, Andrew Makhorin, 2012/11/24
- Re: [Help-glpk] MIP Solvers (i.e CBC, CPLEX, GLPK, GUROBI, LPSOLVE, SCIPC, SCIPL, SCIPS and XPRESS) Benchmark, Robbie Morrison, 2012/11/24
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