Why do i receive Solving problem using linprog. The dual-simplex algorithm uses a built-in starting point; ignoring supplied X0. Problem is unbounded.
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Deepak Singh
am 6 Sep. 2021
Kommentiert: Deepak Singh
am 14 Okt. 2021
Can anyone tell or explain me why the below is coming after writing the code:-
x = optimvar('x',2,'LowerBound',[0 0],'UpperBound',[inf inf]);
obj = (45* x(1) + 80* x(2));
A = 5*x(1) + 20*x(2) <= 400;
B = 10*x(1) + 15*x(2) <=450;
Prob = optimproblem('Objective',obj, 'ObjectiveSense', 'maximize');
prob.Contraints.con_1 = A;
prob.Contraints.con_2 = B;
x0.x = [0 0];
[sol, fval, exitflag, output] = solve(Prob, x0);
Solving problem using linprog.
The dual-simplex algorithm uses a built-in starting point;
ignoring supplied X0.
Problem is unbounded.
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Matt J
am 6 Sep. 2021
Bearbeitet: Matt J
am 6 Sep. 2021
The first part of the message is because you are giving an initial guess x0 to solve(). This x0 is being ignored because it is not useful to the solver algorithm. The algorithm autogenerates its own starting point.
The second part "Problem is unbounded" is because the solver has determined that there is no finite solution. This is because you asssigned your constraints to "prob" instead of to "Prob".
x = optimvar('x',2,'LowerBound',[0 0],'UpperBound',[inf inf]);
obj = (45* x(1) + 80* x(2));
A = 5*x(1) + 20*x(2) <= 400;
B = 10*x(1) + 15*x(2) <=450;
Prob = optimproblem('Objective',obj, 'ObjectiveSense', 'maximize');
Prob.Constraints.con_1 = A;
Prob.Constraints.con_2 = B;
x0.x = [0 0];
[sol, fval, exitflag, output] = solve(Prob, x0);
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