MATLAB: How to average 5 rows of a vector recursively

Question

I have a very long 1D vector ~ 9445 long. I wish to take the average of sets of 5 down the vector and send them to a new vector for example:

1

2

3

4

5

6

7

8

9

10

would become

3

8

How can I do this easily?

Many thanks

Answer 1

V = 1:9445; % Your vector
setsize = 5;
for x = 1:length(V)/setsize
    Vnew(x) = mean(V((x-1)*setsize+1:x*setsize))
end

I hope this is simple enough.