Function f=myfun(x)
f=3*sqrt((x( 1)-3)^2+(x(2)-4)^2)+ 1 1*sqrt((x( 1)- 1)^2+(x(2)-7)^2)+5*sqrt((x( 1)-9)^2+(x(2)-3)^2);
end
% viewpoint (x, y) is a two-dimensional vector such as x =;;
[x,fval]=fminsearch(@myfun,x0)
%x0 is the initial value and can be set freely.
%myfun is the objective function.
%fval: Returns the function value of the objective function at the optimal solution X point.
%x is the minimum value.
The final running result is shown in the following figure: