Solution of Linear Programming Problems with Matlab

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 =

[]

[Kristian Salma]

Okey, thank you so much.

Answer 1

[Matt J]

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

[Kristian Salma]

Thank you soo Matt, have a nice day. You saved me.