MATLAB: How to shift a vector numerically to the right (or the left) by adding zeros to the side of the array

array extensionvector shift

Supposing I have a vector x=[1 2 3] and I need it to shift it to the right of two integers how can i generate a new vector x1=[0 0 1 2 3]

x1=[zeros(1,2),x]

Use

 x_2 = circshift(x',-1,1)'

Since your vector is a column vector, shifting left or right (e.g. with circshift) will result in the exact same vector, while a row vector will not:

>>circshift([1;2;3],1,2)
ans =
     1
     2
     3
>>circshift([1,2,3],1,2)
ans =
     3     1     2

Read the doc for circshift to understand what it does. (and it is always easier to understand a function when you enter small inputs)