How to shuffle rows in pairs in a 600 x 2 matrix that only contains integers?

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Neuro 2022-3-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1678499-how-to-shuffle-rows-in-pairs-in-a-600-x-2-matrix-that-only-contains-integers

评论： Neuro 2022-3-23

采纳的回答： Jan

Hello. I have a 600 x 2 matrix called 'File', which only contains the following integers, in sequence:

10 1

30 2

50 1

70 8

90 3

10 5

40 6

50 2

(and the list repeats itself up to row 600).

I want to shuffle (randomize) the order of the rows in pairs, so row 2 is always preceded by row 1, row 4 is always preceded by row 3, and so on. Like each pair of rows was grouped.

a 600 x 1 matrix. They can have only 8 values, let's say 1, 2, 3, 4, 5, 6, 7, and 8. I want to randomize the order of the rows but in pairs so 1 is always followed by 2, and 3 is always followed by 4, 5 is always followed by 6, and 7 is always followed by 8. Like there were only 4 elements: 1-2, 3-4, 5-6, and 7-8. But in pairs in rows (within the same column).

Thank you!

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Arif Hoq 2022-3-23

编辑：Arif Hoq 2022-3-23

so, how about this ? i guess,same query.

https://www.mathworks.com/matlabcentral/answers/1678234-how-to-shuffle-rows-in-pairs?s_tid=srchtitle

Neuro 2022-3-23

Yes, but I didn't get the correct response so I decided to add more details here.

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Answer 1

Jan 2022-3-23

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1678499-how-to-shuffle-rows-in-pairs-in-a-600-x-2-matrix-that-only-contains-integers#answer_924924

编辑：Jan 2022-3-23

在 MATLAB Online 中打开

A = [10 1; ...
2; ...
1; ...
8; ...
3; ...
5; ...
6; ...
2];
s = size(A);
B = reshape(A, 2, s(1)/2, s(2));
B = B(:, randperm(s(1)/2), :);
B = reshape(B, s)
B = 8×2
   1
   8
   3
   5
   1
   2
   6
   2