How can I add zeros between elements of a matrix?

I have a vector [1,2,3];

and I want to obtain [1,0,2,0,3,0];

How can this be achieved?

Answer 1

[Stephen23]

>> A = [1,2,3];

Method one: indexing:

>> B = zeros(size(A).*[1,2]);
>> B(1:2:end) = A
B =
   1   0   2   0   3   0

Method two: reshape:

>> B = A;
>> B(2,:) = 0;
>> B = B(:).'
B =
   1   0   2   0   3   0

Answer 2

[madhan ravi]

reshape([vector; zeros(size(vector))], 1, [])