How do you get all pairs without double counting?

Question

L'O.G. 2022-7-16

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1761850-how-do-you-get-all-pairs-without-double-counting

回答： Voss 2022-7-16

Given, say, 10 numbers, how do you get all possible pairs between the numbers without double counting? Order doesn't matter, so 1-3 is the same as 3-1. How would you do this with for loops vs. vectorized? Is there a difference in performance between the two?

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

Voss 2022-7-16

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1761850-how-do-you-get-all-pairs-without-double-counting#answer_1009025

在 MATLAB Online 中打开

Here's one way:

ten_numbers = 1:10;
all_pairs = nchoosek(ten_numbers,2);
disp(all_pairs);
   2
   3
   4
   5
   6
   7
   8
   9
  10
   3
   4
   5
   6
   7
   8
   9
  10
   4
   5
   6
   7
   8
   9
  10
   5
   6
   7
   8
   9
  10
   6
   7
   8
   9
  10
   7
   8
   9
  10
   8
   9
  10
   9
  10
  10