All Questions
13 questions
1
vote
1
answer
348
views
Warning cplexlink1261 using Cplex for Matlab: unsupported Matlab verions?
I made a code that solve a Mixed Integer Linear Problem (MILP). In order to be as fast as possible, my code is using Cplex functions to solve the MILP, cplexmilp and cplexoptimset.
The only thing I ...
- 307
0
votes
1
answer
151
views
How to add constraint x∈{a,b} using cplex in Matlab?
I am trying to get solution for variable x using cplex in Matlab , but I'm confused how to write the syntax since I wanna the solution x∈{a,b}.
For example, assume that I have this LP problem:
...
- 1
0
votes
0
answers
397
views
Setting multiple cores option with cplex matlab toolbox function cplexmilp
I am using CPLEX for MATLAB toolbox wherein I formulate my MILP as a huge matrix and use the function cplexmilp to call the solver. Since the model I am solving is really huge, I intend to set the ...
- 105
0
votes
2
answers
453
views
use CPLEX from MATLAB
I have a text file of lp problem
Minimize
5.8 x_1 + 3 x_2
subject to
x_1 + 2.1 x_2 = 6
3 x_2 < 4.2
bounds
x_1 >= 0
x_2 >= 0
Integer
x_1
end
I use ...
- 1,077
0
votes
2
answers
565
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cplex: lowering the effective tolerance of cplexlp by scaling the linear program
I'm using cplex linear programming in matlab (cplexlp) to solve the problem
min f'u s.t. Au>=b, u>=lb
using
[u,minima,flag] = cplexlp(f,-A,-b,[],[],lb);
but I need a solution tolerance of ...
- 3,608
0
votes
1
answer
799
views
how to solve integer linear programming when one of the variables belong to a set
I am working on solving optimization problems using integer linear programming, one of the constraints assume that the variable has a value belongs to a set of values like the following
min 5*x1 + 2*...
2
votes
1
answer
4k
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What cause the error "Row 'c1408' infeasible, all entries at implied bounds."? How can I display it in matlab?
I ran into this problem when I tried to use cplexmiqp in matlab to solve a unit commitment problem.
I have a lot of constraints but I carefully checked all the constraints, they should be fine. I ...
- 21
0
votes
1
answer
474
views
Multiples of decision variable
I am a newbie for mathematical programming stuff. I want to solve a MILP problem. It aims to maximize summation of x_i s , however I want x_i s either 0 or multiple of some value (let's say, 5). So ...
- 37
1
vote
2
answers
3k
views
Giving priority to some variables in linear programming
I have to optimize an objective using binary integer linear programming, my objective function is:
Maximize f= (c1 * x1) + (c2 * x2) +(c3 * x3) + ... + (c10000 * x10000)
Subject to some constraints
...
- 322
4
votes
2
answers
2k
views
Weird result of CPLEX "cplexmilp" function in MATLAB
According to my previous question, I want to optimize an objective function using binary integer linear programming (all of variables are binary) as follows:
Minimize f = (c1*x1) + (c2*x2) + MAX((...
- 322
2
votes
2
answers
738
views
MATLAB has crashed when using CPLEX API for linear programming
Hi I want to solve linear programming (LP) problem which has 25000 binary variables and almost 2555 equality constraints and 50 inequality constraints , so I used cplexbilp function which CPLEX API ...
- 322
5
votes
1
answer
10k
views
CPLEX + YALMIP -- "Solver not found"?
I'm trying to get started with YALMIP, which is a Matlab interface to optimization solvers such as CPLEX. I have an objective function obj and constraints cons, and I've plugged them into Yalmip...
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- 8,909
2
votes
0
answers
2k
views
Sensitivity analysis in LP solvers from MATLAB
As far as I understand, CPLEX, LP_solve and GLPK, among other LP solvers, offer sensitivity analysis.
I have the above three solvers installed on my machine, along with these two MATLAB wrappers:
...
- 96.7k