matlab 的嵌套循环问题

clc;clear
x=1:5;
x1=x;
A(5,5)=0;
for i=1:5
    for j=1:5
        if x(i)>=x1(j)
            A(i,j)=x(j)^2;
        else
         A(i,j)=x(j)^3;
        end
    end
end
A