Error using optimization tool bx

I created a sciprt file name objective

And i key in the function below

function  f =  objective(x)
f = -2.84.*x(:,1)+0.22.*x(:,2)+3.33.*x(:,3)-1.09.*x(:,4)-9.39.*x(:,5)-9.51.*x(:,6)+0;
A:[1.1 0.9 0.9 1 1.1 0.9; 0.5 0.35 0.25 0.25 0.5 0.35; 0.01 0.15 0.15 0.18 0.01 0.15 ]
B: [200000 100000 20000]
Aeq: [0.4 0.06 0.04 0.05 -0.6 0.06; 0 0.1 0.01 0.01 0 -0.9; -6857.6 364 2032 -1145 -6857.6 364 21520] 
Beq:[0 0 20000000]

When solve by optimum toolbox it displays message below:

Optimization running.

Error running optimization.

LINPROG requires the following inputs to be of data type double: 'f'.

[Gifari Zulkarnaen]

What is difference between A and B equality? They should be in one equation, unless one of them is inequality.

[Walter Roberson]

In standard constraint notation used by MATLAB,

A*X  <= B
Aeq*X == Beq

That is, A and B express an inequality, and Aeq and Beq express an equality.

Answer 1

[Gifari Zulkarnaen]

Try this

[x,fval] = ga(@objective,6);

function f = objective(x)
    f = -2.84.*x(:,1)+0.22.*x(:,2)+3.33.*x(:,3)-1.09.*x(:,4)-9.39.*x(:,5)-9.51.*x(:,6)+0;
end

[Jay Loh]

still cannot solve it

[Gifari Zulkarnaen]

It works in my matlab. Can you describe how it cannot in yours?

[Jay Loh]

Bcs i need to create a script file name objective

I key in the base on what your teach

it shows unable to define location function 'objective' bcs it has a same name as the file

[Gifari Zulkarnaen]

How about changing either the file name or the function name?

[Walter Roberson]

When you have a function in a file and the first executable word of the file is not "function" then the function name cannot be the same as the file name.

[Walter Roberson]

Is your requirement to define a script that minimizes a certain linear system and the script must be named objective ? If so then name the script objective.m but rename the function inside it to something else.

Is your requirement to define a function named objective that is to be used in minimizing a nonlinear system, together with a script that invokes the appropriate minimizer? If so then put the function in its own file named objective.m and put the driving script into a different file.

Answer 2

[Walter Roberson]

linprog() does not permit a function handle as the first argument. linprog is linear programming, which permits the problem to be described by numeric matrices. Function handles are not permitted because function handles usually imply nonlinear functions.