I would like to know what is the easiest and most efficient way to solve the integration shown in the figure attached.
I tried the following code, but it doesn't work:
R1 = @(x1,x2) integral2(@(x3,x4) fun_g(x1,x2,x3,x4),l3,u3,l4,u4);R = integral2(R1.*@fun_f,l1,u1,l2,u2);function f = fun_f(x1,x2)% here we define f function (it is a rather complex function)endfunction g = fun_g(x1,x2,x3,x4)% here we define g function (it is a rather complex function)end
Thanks in advance!