Padding a vector with zeros

How do I pad a vector of type double so that there are say 5 elements with zeros after every 3rd element in the original vector?

For a simple example:

A = [1 2 0.3 2.4 20.3 1.111 6.3 7.1 44];

I want to have

B = [1 2 0.3 0 0 0 0 0 2.4 20.3 1.111 0 0 0 0 0 6.3 7.1 44 0 0 0 0 0];

Answer 1

[David Hill]

A = [1 2 0.3 2.4 20.3 1.111 6.3 7.1 44];
b=reshape(A,3,[]);
b=[b;zeros(5,size(b,2))];
B=b(:)';

[James Tursa]

The third line above could also just be:

b(end+5,end) = 0;