How do you get all pairs without double counting?

L'O.G.

2022 7 16

1 个回答

2 次查看（30 天）

0 个投票

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?

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回答（1 个）

Voss 2022-7-16

在 MATLAB Online 中打开

0 个投票

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