Effacer les filtres
Effacer les filtres

Solving a linear programming problem uising linprog

37 vues (au cours des 30 derniers jours)
Sergio
Sergio le 23 Mai 2024
Commenté : Rena Berman le 10 Juil 2024 à 13:44
I have the given linear program to solve.
To solve this I prepare the following for the constraints on each of the six variables:
A = [110 205 160 160 420 260;
4 32 13 8 4 14;
2 12 54 285 22 80];
b = [2000 55 800];
where the function to be minimized with constraints:
f = [3 24 13 9 20 19];
lb = [0,0,0,0,0,0];
ub = [4,3,2,8,2,2];
Is solved by:
options = optimoptions('linprog','Algorithm','dual-simplex');
[x,fval,exitflag,output] = linprog(f,A,b,lb,ub,options)
.
I get "Error using linprog (line 182)
LINPROG requires the following inputs to be of data type double: 'LB'"
How do I prepare the linear inequalities correctly?
With Thanks
  4 commentaires
Sergio
Sergio le 7 Juil 2024 à 16:06
@Torsten I acidentally edited an old question with a new question, I tried to delete it , but that didn't work!
Rena Berman
Rena Berman le 10 Juil 2024 à 13:44

(Answers Dev) Restored edit

Connectez-vous pour commenter.

Réponse acceptée

Torsten
Torsten le 23 Mai 2024
Modifié(e) : Torsten le 23 Mai 2024
A = -[110 205 160 160 420 260;...
4 32 13 8 4 14;...
2 12 54 285 22 80];
b = -[2000; 55; 800];
Aeq = [];
beq = [];
where the function to be minimized with constraints:
f = [3 24 13 9 20 19];
lb = [0,0,0,0,0,0];
ub = [4,3,2,8,2,2];
Is solved by:
options = optimoptions('linprog','Algorithm','dual-simplex');
[x,fval,exitflag,output] = linprog(f,A,b,Aeq,beq,lb,ub,options)
Optimal solution found.
x = 6x1
4.0000 0 0 4.5000 2.0000 0
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>
fval = 92.5000
exitflag = 1
output = struct with fields:
iterations: 3 algorithm: 'dual-simplex-highs' constrviolation: 0 message: 'Optimal solution found.' firstorderopt: 1.7764e-15

Plus de réponses (1)

Ayush Modi
Ayush Modi le 23 Mai 2024
Modifié(e) : Ayush Modi le 23 Mai 2024
Hi Sergio,
The error you are getting is because of extra parameters in the function call. Here is how you can make the call to the "linprog" function with lower and upper bounds:
x = linprog(f,A,b,Aeq,beq,lb,ub,options) % Maximum 8 parameters
Refer to the following MathWorks documentation for more information on syntax of "linprog" function:

Tags

Produits


Version

R2024a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by