Hi all, i get this error at using GA optimtool " error running optimization. matrix dimensions must agree" so kindly can any one explain what is the problem.

I have nonlinear constrained optimization problem (optimum selection of relay settings). when trying to solve it using genetic algorithm (using optimtool box) it generates this error "error running optimization. matrix dimensions must agree" although it is solvable using fmincon with the same objective and constraints functions.

Answer 1

[Alan Weiss]

fmincon is more forgiving about the orientation of your variables, allowing you to pass arrays of any dimension, as described here. ga requires that your control variables be row vectors. You probably assume, in your objective or constraint functions, that the variables are column vectors or some multidimensional array.

Alan Weiss

MATLAB mathematical toolbox documentation

[mohamed afifi]

thanks for help, I revised the code and all control variables(constraints, boundaries and optimization variable) are row vector but this error is still there.

[Alan Weiss]

For more help, please post code; it is impossible for me to imagine what is going on without seeing where the dimension mismatch might be. You can also use the debugger to try to figure it out yourself.

Alan Weiss

MATLAB mathematical toolbox documentation

[mohamed afifi]

Kindly find the attached codes for objective function and constraints and structure file that contains problem options

[mohamed afifi]

How can i use the debugger with optimization toolbox?

[Alan Weiss]

I could not understand what your program is doing because I have no idea what SystemModel(); is.

Use the debugger with Optimization Toolbox™ the same way you would use it with plain MATLAB code. Step through things one at a time. Write an output function or use a plot function to see the values that are being passed to ga, or just put a break point in ga which is, after all, MATLAB code.

Good luck,

Alan Weiss

MATLAB mathematical toolbox documentation

[RAJENDRA KUMAR SHARMA]

how to make objective function of coordination relay please anybody explain urgent