how to calculate the average of two values data that side by side and place it between those two values

i want to calculate the average of two values data that side by side and place it between those two values

for example i have matrix

A=[3;5;7;1;3]

the average of those data that side by side is [4;6;4;2]

then i want it to become

B=[3

4

5

6

7

4

1

2

3]

Answer 1

[Bhaskar R]

mn = movmean(A, 2, 'Endpoints','discard');
Result = zeros(1, length(A)+length(mn));
Result(1:2:end) = A;
Result(2:2:end) = mn

[Madania Nia]

thank you