shifted triangular matrix array

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SV
SV 2019-12-6
评论： SV 2019-12-6
If I have matrix a=[1 2; 3 4; 5 6; 7 8] (dimension 4x2) and i want to calculate
A= [1 2 0 0 0 0 0 0;
3 4 1 2 0 0 0 0;
5 6 3 4 1 2 0 0;
7 8 5 6 3 4 1 2]
(dimension 4x8),
how can i do?
Thanks.

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采纳的回答

Matt J
Matt J 2019-12-6
编辑：Matt J 2019-12-6
ac=num2cell([0,0;a],2);
T=toeplitz(1:4,[1,zeros(1,3)]);
A=cell2mat(ac(T+1))
A =
1 2 0 0 0 0 0 0
3 4 1 2 0 0 0 0
5 6 3 4 1 2 0 0
7 8 5 6 3 4 1 2

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