First, here's the correct way to set up the loop. Avoid the n=n+1 approach in for-loops because for-loops are designed to iterate that way.
a = 89:0.5:91.5;
V = nan(size(a));
for i = 1:numel(a)
V(i)=2*rand+a(i);
end
Or, better yet, the vectorized version that does the entire thing in 1 line
V = 2 * rand(size(a)) + a;
But since 'a' contains 6 values, V will also contain 6 values. If you want 5 values, you'll need to redefine a.
