How to enter intermittent entries in a vector

Hi, I need a bit of your help please. Consider I have a vector A = [a1 a2 a3 a4], and another vector B=zeros(2*length(A)). I want to put the entries of A into B as follows:

B = [a1 a2 0 0 a3 a4 0 0]. Intermittent entries. I hope I am able to convey clearly the requirement. Awaiting the kind response.

[Waheeb Butt]

Thanks alot, it helped :)

Answer 1

[Nora Khaled]

a=1:1:6;
v=[];
for i=1:2:length(a)
   v=[v a(i) a(i+1) 0 0] ;
end

v