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How to shuffle randomly first raw of a matrix so its corresponding value in the column shuffles with it

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Paz Yedidim 2022-6-26

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评论： Matt J 2022-6-26

I have a matrix

X=[N1...N5 ; M1...M5];

I want to shuffle the N values so they have their corresponding M values in the second row.

For example:

If N values are shuffled as: N3, N1, N5, N4, N2

then, the new vector will be:

X=[N3, N1, N5, N4, N2 ; M3, M1, M5, M4, M2]

** This matrix is just an example, I will have to shuffle a much larger matrix a several times (each time shuffles randomly)

Help please

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回答（1 个）

Matt J 2022-6-26

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1748335-how-to-shuffle-randomly-first-raw-of-a-matrix-so-its-corresponding-value-in-the-column-shuffles-with#answer_993770

编辑：Matt J 2022-6-26

在 MATLAB Online 中打开

X=rand(2,5)
X = 2×5
    0.1792    0.3018    0.7249    0.2244    0.7763
    0.9590    0.4391    0.9836    0.8612    0.9649
X=X(:,[3,1,5,4,2])
X = 2×5
    0.7249    0.1792    0.7763    0.2244    0.3018
    0.9836    0.9590    0.9649    0.8612    0.4391

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Paz Yedidim 2022-6-26

I need to shuffle it randomly

I gave this shuffle order for the example only

Matt J 2022-6-26

use randperm to generate a randomized shuffle of the inidces.

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