How to generate a list of random ID which can later be used instead of participant name?

Due to the cyclist remark about homework, I am just starting the script. It leaves out certain patterns like 'a9a9' since it is just using combinations. How you rearrange the unique patterns is up to you.

a_26_2 = nchoosek('a':'z',2);
n_10_2 = nchoosek('0':'9',2);
a_26_2f = [a_26_2; fliplr(a_26_2)]; % gives 650 2 letter unique alpha strings
n_10_2f = [n_10_2; fliplr(n_10_2)]; % gives  90 2 letter unique numeric strings

By merging all possibilities, you can get 650*90 (almost 60,000) unique 4 char id's.

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Walter Roberson 2021-3-4

We are not told that letters are restricted to lowercase.

We are also not told to avoid easily confused possibilities such as l0lO

Paul Hoffrichter 2021-3-5

True. But if homework as @the cyclist was trying to determine, getting a start is better than nothing.

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Answer 2

David Hill 2021-3-4

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https://ww2.mathworks.cn/matlabcentral/answers/763341-how-to-generate-a-list-of-random-id-which-can-later-be-used-instead-of-participant-name#answer_639436

在 MATLAB Online 中打开

Yes, a strictly numerical format would be much easier.

a=[randperm(10,2)+47;randperm(26,2)+96];
a=char(a(:)');

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Walter Roberson 2021-3-4

We are not promised that the order of digits and letters is fixed, just that there are two of each.

Parishad Bromandnia 2021-3-5

@Paul Hoffrichter Thank you so much for your effort :)

Thats what I need and enough for my purpose.

Best,

Parishad

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