Solution of Linear Programming Problems with Matlab

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Kristian Salma
Kristian Salma on 2 Jan 2022
Commented: Kristian Salma on 2 Jan 2022
Hi, have a nice day to everyone,
I have an issue with solve this Solution can you please help me why l get Problem is unbounded.
f=[-3 -8 3];
b=[27.3,20.5,19];
A=[11,1,6;1,11,1;0,1,0];
[x,fmin] = linprog(f,A,b)
Problem is unbounded.
x =
[]
fmin =
[]

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Accepted Answer

Matt J
Matt J on 2 Jan 2022
Edited: Matt J on 2 Jan 2022
Ran in:
In addition to not entering the positivity constraints x(i)>=0 and mis-typing f, you entered <= constraints instead of >= constraints.
f=[3 -8 3];
A=-[11,1,6;
1,11,1];
b=-[27.3,20.5];
lb=[0,0,0];
ub=[inf,19,inf];
[x,fmin] = linprog(f,A,b,[],[],lb,ub)
Optimal solution found.
x = 3×1
0.7545 19.0000 0
fmin = -149.7364

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