Index exceeds array bounds

n = 6;
f = zeros(n);
for i = n
  if i <= n
    f = i;
  end
  if f(i) == 1 || f(i) == 2
    f(i - 1) = 1;
    f(i - 2) = 1;
  end
  f(i) = f(i - 1) + f(i - 2);
end

Answer 1

[dpb]

No idea what really trying to accomplish but

n = 6;             
f = zeros(n);  % f=nxn array zeros
for i = n      % i=6
  if i <= n    % i==n so
    f = i;     % f=6 and the array f went away...
  end

Now all the references to f as an array of other than 1x1 are invalid hence the error.

Tell us what you really are trying to do...