[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Help-glpk] A Simple MIP model in MathProg - (simple cplex mip model
From: |
Noli Sicad |
Subject: |
Re: [Help-glpk] A Simple MIP model in MathProg - (simple cplex mip model included) |
Date: |
Wed, 7 Nov 2012 11:08:59 +1100 |
Hi Raniere,
OK. Thanks.
However, I need a MathProg formulation that uses MathProg equations.
For example.
#################
param number := 4;
set NUMBER := {1..number};
var x {n in NUMBER};
Maximise
.
.
.
##################
I need to know how to declare integer in variable in MathProg in the
format above.
This question is related to the MIP problem that I posted earlier
(i.e. MIP Harvest Scheduling).
Thanks.
Regards, Noli
On 11/7/12, Raniere Gaia Silva <address@hidden> wrote:
> Hi Noli,
> translate the code you request to MathProg:
>
> ###
>
> var x1, >=0, <=40;
> var x2;
> var x3;
> var x4, >=2, <=3;
>
> s.t. c1: - x1 + x2 + x3 + 10 * x4, <= 20;
> s.t. c2: x1 - 3 * x2 + x3, <= 30;
> s.t. c3: x2 - 3.5 * x4, == 0;
>
> maximize obj: x1 + 2 * x2 + 3 * x3 + x4;
>
> end;
>
> ###
>
> E a saĆda ao resolver com o glpsol:
>
> ###
>
> $ glpsol -m foo.mod
> GLPSOL: GLPK LP/MIP Solver, v4.47
> Parameter(s) specified in the command line:
> -m foo.mod
> Reading model section from foo.mod...
> 12 lines were read
> Generating c1...
> Generating c2...
> Generating c3...
> Generating obj...
> Model has been successfully generated
> GLPK Simplex Optimizer, v4.47
> 4 rows, 4 columns, 13 non-zeros
> Preprocessing...
> 3 rows, 4 columns, 9 non-zeros
> Scaling...
> A: min|aij| = 1.000e+00 max|aij| = 1.000e+01 ratio = 1.000e+01
> Problem data seem to be well scaled
> Constructing initial basis...
> Size of triangular part = 3
> 0: obj = 0.000000000e+00 infeas = 2.000e+00 (0)
> * 2: obj = 2.300000000e+01 infeas = 0.000e+00 (0)
> * 4: obj = 1.252083333e+02 infeas = 0.000e+00 (0)
> OPTIMAL SOLUTION FOUND
> Time used: 0.0 secs
> Memory used: 0.1 Mb (115425 bytes)
>
> ###
>
> More information you can find in the file $GLPK_SRC/doc/gmpl.pdf.
>
> Raniere
>
- [Help-glpk] A Simple MIP model in MathProg - (simple cplex mip model included), Noli Sicad, 2012/11/06
- Re: [Help-glpk] A Simple MIP model in MathProg - (simple cplex mip model included), Raniere Gaia Silva, 2012/11/06
- Re: [Help-glpk] A Simple MIP model in MathProg - (simple cplex mip model included),
Noli Sicad <=
- Re: [Help-glpk] A Simple MIP model in MathProg - (simple cplex mip model included), Noli Sicad, 2012/11/06
- Re: [Help-glpk] A Simple MIP model in MathProg - (simple cplex mip model included), Raniere Gaia Silva, 2012/11/06
- Re: [Help-glpk] A Simple MIP model in MathProg - (simple cplex mip model included), Noli Sicad, 2012/11/06
- Re: [Help-glpk] A Simple MIP model in MathProg - (simple cplex mip model included), Raniere Gaia Silva, 2012/11/06
- Re: [Help-glpk] A Simple MIP model in MathProg - (simple cplex mip model included), Noli Sicad, 2012/11/06