MATLAB: How to store values form a loop in a vector

Question

How do I store the values of my "y" output in a vector?

for n=(0:8);
    a=n;
    b=n-8;
   if a=0
       a=1;
   else a=0;
   end
   if b=0
       b=1;
   else b=0;
   end
     d=(1/2)*a;
     d1=(1/2)*b;
     y=d+d1;

Answer 1

y(n+1) = d+d1;