average of each two vectors of a matrix

I have a matrix of n*n for example 10*5

x=rand(10,5)

Then I want to get the average of each two row. For example the first two row (each element ) etc

I will have a matrix of 5*5 after that

Answer 1

[Iain]

 (x(2:2:10,:) + x(1:2:9,:))/2

Thats the "simple" answer. There are other methods that are more flexible, but which need a little more thought eg.:

 y = reshape(x,[2,5,5])
 answer = squeeze(mean(y));

[Stephen23]

The first solution can also be generalized a little using end instead of hardcoded limits:

(x(2:2:end,:) + x(1:2:end,:))/2

Answer 2

[Azzi Abdelmalek]

a=reshape(mean(permute(reshape(x',5,2,[]),[2 1 3])),5,5)'