MATLAB: Vectorizing a simple for loop

Question

Hi everyone, I'm not sure if people asked this before but I tried googling my question before posting.

so i know for this type of loop for example:

for i = 2:n-1
 for j = 2:n-1
   q(i,j) = a*u(i,j)
 end
end

can be simply expressed as: q((2:n-1),(2:n-1)) = a*u((2:n-1),(2:n-1));

what if my expression was as follows: for i = 2:n-1 for j = 2:n-1 q(i,j) = a*u(i+1,j) end end

how could I incorporate the "i+1" expression into vectorizing.

Thank you for your help

Answer 1

q(2:n-1, 2:n-1) = a*u(3:n, 2:n-1);