function f = isFibo(v)
% ISFIBO returns true if v is a vector whose numbers are a
% Fibonacci  series
[x y] = size(v)
if x~=1 & y~=1 
        f=false;
        return
end
for i = 3: numel(v)
      if v(i)~= v(i-1)+v(i-2)
             f=false;
            return
      end
end
f=true
end