How to choose 2 people randomly among 12 ?

Question

Negar 2013-10-24

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/91348-how-to-choose-2-people-randomly-among-12

评论： Negar 2013-10-24

Hi all,

Here is my question: I have a group of 12 peoples, Now I want to make a mini group by picking 2 of them by random. I've somehow done that, but the problem is that I want the result to be shown as a 2x1 vector, and not 2x2 matrix .

Here is my code:

Group={'ae','bk','cn','es','fh','hv','mh','ol','sd','sg','ss','ts'}; m=randi([1 12],2,1) % A 2x1 array of random numbers between 1 and 12 Minigroup=[Group{m(1)} ; Group{m(2)}]

As you see, size of the Minigroup is 2x2 . Any suggestions?

Thank you

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Wayne King 2013-10-24

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/91348-how-to-choose-2-people-randomly-among-12#answer_100699

编辑：Wayne King 2013-10-24

在 MATLAB Online 中打开

Group={'ae','bk','cn','es','fh','hv','mh','ol','sd','sg','ss','ts'}; 
idx = randperm(12,2);
Group{idx}

I think you want to use randperm() instead of randi(), because randi() can give you the same index twice and presumably you want two different people.

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Negar 2013-10-24

编辑：Negar 2013-10-24

Thank you for the randperm, you are absolutely right ! :)

And another thing, how can I remove these two persons from my category and make a new group excluding them?

请先登录，再进行评论。

Answer 2

Wayne King 2013-10-24

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/91348-how-to-choose-2-people-randomly-among-12#answer_103482

在 MATLAB Online 中打开

Group={'ae','bk','cn','es','fh','hv','mh','ol','sd','sg','ss','ts'}; 
 idx = randperm(12,2);
 ind = setdiff(1:length(Group),idx);
 GroupNew = Group(ind);