How to use randperm to create a vector with multiples of the same number?

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lauuser1 2016-2-22

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https://ww2.mathworks.cn/matlabcentral/answers/269485-how-to-use-randperm-to-create-a-vector-with-multiples-of-the-same-number

回答： Guillaume 2016-2-22

Let's say I want to create a shuffled 1x26 vector with the values 2-11 but the value 10 comes up 4 times. So the vector might look something like

A = 2 10 10 3 4 10 6 7 10 8 9 11 5 10 10 10 2 4 3 5 11 7 9 6 10 8

What line of code would do that? I have previously used a similar code

A_before = repmat(1:13 , [1 2]);
A = A_before(randperm(26))

and would like something similar to that but where the range is 2-11 and value 10 appears four times. (So one batch of 13 values will have four 10s, the whole batch of 26 values will have a total of eight 10s)

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Jan 2016-2-22

编辑：Jan 2016-2-22

What does "not with consecutive numbers" mean? Please define exactly, what you want to achieve. The less the readers have to guess, the better.

lauuser1 2016-2-22

Well I guess I technically am looking for consecutive numbers but what I'm trying to say is instead of the numbers 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 I want it to be 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, 10, 11

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Answer 1

Guillaume 2016-2-22

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https://ww2.mathworks.cn/matlabcentral/answers/269485-how-to-use-randperm-to-create-a-vector-with-multiples-of-the-same-number#answer_210836

在 MATLAB Online 中打开

So, why not?

A_before = repmat([2:11, 10, 10, 10] , [1 2]);
A = A_before(randperm(26))

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How to use randperm to create a vector with multiples of the same number?

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