MATLAB: Shift array by one element backwards or forward

arrayMATLABmatrix manipulation

For example, I have an array indexed by n, running from -n to +n

A_n=[-n,..-1,0,1,…..]

I want to create a new array A_{n+1} which will shift every element of A_n one place forward

and A_{n-1} which will shift every element of A_n one place backwards.

How to do it?

x = -5:5;   % array
fr = circshift(x, 1);   % forward
bk = circshift(x, -1);  % backward

there is a function, circshift that will do exactly what you want.

x_shift = circshift(x, [m 0]);      % Column Vector
x_shift = circshift(x, [0 m]);      % Row Vector

Note that ‘m’ can be either positive or negative, depending on the direction you want to do the shift.

circshift(A, [0 -1])