How to split a 2xN matrix into multiple 2x2 matrices?

Question

Hsin-Yen 2024-3-19

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2096111-how-to-split-a-2xn-matrix-into-multiple-2x2-matrices

回答： Dyuman Joshi 2024-3-19

采纳的回答： Dyuman Joshi

How to split a 2xN matrix into multiple 2x2 matrices? and multiply them.

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Answer 1

Dyuman Joshi 2024-3-19

2
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2096111-how-to-split-a-2xn-matrix-into-multiple-2x2-matrices#answer_1427406

在 MATLAB Online 中打开

%Assuming N is a multiple of 2
y = randi(10, 2, 16)
y = 2×16
     1     9     5    10     8     7    10     9     1     1     2     8     2     8    10     7
     8     2     7    10     8     6     2     9     7     6     1     9     2     4     2     2
%Reshaping into 2x2 blocks
y = reshape(y, 2, 2, [])
y = 
y(:,:,1) =

     1     9
     8     2


y(:,:,2) =

     5    10
     7    10


y(:,:,3) =

     8     7
     8     6


y(:,:,4) =

    10     9
     2     9


y(:,:,5) =

     1     1
     7     6


y(:,:,6) =

     2     8
     1     9


y(:,:,7) =

     2     8
     2     4


y(:,:,8) =

    10     7
     2     2
z = y(:,:,1);
for k=2:size(y,3)
    z = z*y(:,:,k);
end
z
z = 2×2
    91869728    73010288
    83919184    66691864