MATLAB: Problem related to multi objective optimization using matlab tool box

Question

sir,

I have a multi objective optimization problem, which is stated as below:

minimize y1(x)= x1*x2*x3
maximize y2(2)= (x1*x2)/0.36,

subject to LOWER BOUND[1.3 0.4 0.22] AND UPPER BOUND [8 1.0 0.27] Y1(X)<=500;Y2(X)>=0.13

I have typed this function and used optimization tool box.

function f= power1(x)
%it is a multi objective function
%f(1)....objective1...equation for pow minimise
%f(2)....objective2...equation for fc maximize
% 
% x(1)....specific energy
% x(2)....width of cut
% x(3)....forward velocity
f(1)= x1*x2*x3;
f(2)= (x2*x3)/0.36;
end

then used the solver multi objective optimization using genetic algorithim. But I am getting a error as under defined function or variable x1. Kindly suggest some way to optimize the problem with matlab.

Answer 1

After the line

function f= power1(x)

add

x1 = x(1); x2 = x(2); x3 = x(3);