I have this code and when run it's telling me that the index exceeds the matrix dimensions. Im in the process of teaching myself matlab. Can anyone help please?

for n=1:42;
    for n=1;
        l=1:52;
    for n=[2 3 4 5 6 9];
        l=1:16;
    for n=[7:8,10:41];
        l=1:17;
    for n=42;
        l=1:53;
 str{n(l, 1), 1}<=x_te(n, 1);
 str{n(l, 1), 1}>=x_le(n, 1);
  s{n(n, 1), 1}=str{n(n, 1), 1};
  size(s{n(n, 1), 1});
    end
    end
    end
    end
end