solving a linear program

How can I solve a Linear programming problem with 3 varibles with matlab? how about more than 3?

Answer 1

[Fangjun Jiang]

What is the problem? Can you show an example? I would think it can be solved. For 3 variables, maybe even without the Optimization Toolbox. http://www.mathworks.com/products/optimization/?s_cid=global_nav

[maryam]

I have many simple linear programming problems like this:

Max u6-u7

1.5u1+u2+u3+u6-u7=0

2u1+2u2+u4+u6-u7=0

4u1+3u2+u5+u6-u7=0

v1+v2+v3+v4=1

u1-v1=0

u2-v2=0

u1,u2,u3..u7>=0

v1,v2,..,v4>=0

I want to find all optimal extreme points.

Would you please help me?

[Fangjun Jiang]

The Optimization Toolbox can definitely do that. See http://www.mathworks.com/help/toolbox/optim/ug/bsmt5ib.html