Randomly pair two sets of integers, without repeating the first set?

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Amos Tan 2017-10-13

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评论： Amos Tan 2017-10-13

I have two sets of integers, Set 1: (1,2,3,...,32) and Set 2: (33,34,35,...,40). That is, Set 1 has 32 items and Set 2 has 8 items.

I would like to pair the items in Set 1 to those in Set 2, such at each item in Set 1 is randomly paired to any of the 8 items in Set 2. This means the items in Set 2 can be repeated, but items in Set 1 are not repeated. And I want them to be paired in a random sequence as well.

Example: 3 paired with 35, 30 paired with 33, 18 paired with 40, 10 paired with 33 (33 can be repeated), etc... until a random sequence is generated where all 32 items in Set 1 are paired.

How can I do this? I know I should be using randperm somewhere.

Thank you so much in advance!

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Answer 1

Roger Stafford 2017-10-13

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https://ww2.mathworks.cn/matlabcentral/answers/361158-randomly-pair-two-sets-of-integers-without-repeating-the-first-set#answer_285626

编辑：Roger Stafford 2017-10-13

在 MATLAB Online 中打开

M = [reshape(set1(randperm(32)),[],1),set2(randi(8,32,1))];

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Amos Tan 2017-10-13

thank you, sir, although for some reason I had to remove the "set1" and "set2" and their accompanying parentheses for it to work.

now I would like to create 50 of such sequences, and save them as separate variables. could you tell me how to do it? I think you have to use looping (for... end)?

thank you!

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