Script that create all combination in a matrix

Question

Lucas S 2020-6-19

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/551194-script-that-create-all-combination-in-a-matrix

评论： Lucas S 2020-6-19

采纳的回答： Rik

Hello,

I have a matrix of 3 elements (3 columns).

A | B | C

Each elements can take 4 values (0, 1, 2, 3). Is there a function or a way to test all possibilities and complete the matrix with all possibilities ? So 3^4 possibilities.

0|1|2

0|1|3

...

Thanks

Edit : I miss an information, in my case elements can have same values so i need to take in consideration :

0 | 0 | 0

1 | 1 | 1

0 | 0 | 2

...

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KSSV 2020-6-19

Read about nchoosek.

Lucas S 2020-6-19

编辑：Lucas S 2020-6-19

Thanks it works for all differents values combination ! But is there also a way to generate combination when elements can have same values too like the in the edit of the post ?

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Answer 1

Rik 2020-6-19

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https://ww2.mathworks.cn/matlabcentral/answers/551194-script-that-create-all-combination-in-a-matrix#answer_454171

Yet another possible solution:

A=0:3;B=0:3;C=0:3;
[A_,B_,C_]=ndgrid(A,B,C);
combs=[A_(:),B_(:),C_(:)];

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Lucas S 2020-6-19

Thanks !

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Answer 2

madhan ravi 2020-6-19

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/551194-script-that-create-all-combination-in-a-matrix#answer_454078

doc randperm

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Lucas S 2020-6-19

编辑：Lucas S 2020-6-19

Thanks it works for all differents values combination ! But is there also a way to generate combination when elements can have same values too like the in the edit of the post ?

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