Hi all; when i run the optimtool i got this message error: ( Optimization running. Error running optimization. Inner matrix dimensions must agree.) so kindly can any one explaine what is the problem

I try to use optimtool (fmincon) to find the optimal values for two variable(x1,x2), I use SQP as the algorithm, the start point [0,0], bounds [0,0], [50,50], and the objective function is @objfun

function f = objfun(x1,x2)
a1=1;
a2=5;
a3=-4;
b1=1;
b2=2;
f=a1*(x1-b1)*(x1-b1)+a2*(x2-b2)*(x2-b2)+a3*x1*x2;
end

Answer 1

[Walter Roberson]

Your objective function will be passed a single variable which is a vector of values. It will not be passed two scalars.

function f = objfun(x)
x1 = x(1); x2 = x(2);
a1=1;
a2=5;
a3=-4;
b1=1;
b2=2;
f=a1*(x1-b1)*(x1-b1)+a2*(x2-b2)*(x2-b2)+a3*x1*x2;
end

[Muna Shehan]

Thanks for your response, it work. Thank you very much