MATLAB: How can i get a matrix from an array like this:

Question

Starting with

a = [12 21 32];

I would like to get this:

M = [12 21 32; 21 32 12; 32 12 21];

with size and length fun. only

Is it some kind of loop???

Answer 1

a = [12 21 32 42];
n=length(a)
M=a
for k=1:n-1
  c=a(1)
  a(1:end-1)=a(2:end)
  a(end)=c
  M=[M;a]
end