MATLAB: Stepwise mean value of array

Question

Hi!

    % a= [1 2 5 6 4 7......]

how to get the mean value :

mean_a =[mean(a(1),a(110)),mean(a(2),a(120)), mean(a(3),a(130))…………]

thanky

Answer 1

x      = rand(1, 1000);
index1 = 1:10;
index2 = 100:100:1000;
result = (x(index1) + x(index2)) * 0.5;