MATLAB: How to make a slide windows

MATLABmoving window; sliding window

Please help me out!
A = [ 1 2 3 4 5 6; 7 8 9 10 11 12 ; 13 14 15 16 17 18 ];
A =
     1     2     3     4     5     6
     7     8     9    10    11    12
    13    14    15    16    17    18
B=[ 1 7 13 0 0 0 0 0; 0 2 8 14 0 0 0 0; 0 0 3 9 15 0 0 0 ; 0 0 0 4 10 16 0 0; 0 0 0 0 5 11 17 0; 0 0 0 0 0 6 12 18];
B =
     1     7    13     0     0     0     0     0
     0     2     8    14     0     0     0     0
     0     0     3     9    15     0     0     0
     0     0     0     4    10    16     0     0
     0     0     0     0     5    11    17     0
     0     0     0     0     0     6    12    18
Could I make this B matrix without for loop condition?
Please help me out!

Best Answer

A = [ 1 2 3 4 5 6; 7 8 9 10 11 12 ; 13 14 15 16 17 18 ]
[n,m]=size(A)
B=[A' zeros(m,m-1)]
D=cell2mat(arrayfun(@(x) circshift(B(x,:),[0 x-1]),(1:m)','un',0))
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