Vectorizing a simple for loop

Hi everyone, I have a simple question that I somehow can't seem to figure out

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 follow: 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

[Walter Roberson]

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