Info

此问题已关闭。 请重新打开它进行编辑或回答。

Random vector non repeated otherwise create new vector

1 次查看（过去 30 天）
Yigitalp Ozmen
Yigitalp Ozmen 2019-7-12
关闭： MATLAB Answer Bot 2021-8-20
Hello,
I have number list from 1 to 5. We know there are 120 different permutation for these. I want to write a rule that for my algorithm, I want to create a permutation that does not creaated before. For example,
1 2 3 4 5 first
2 3 4 5 1 second
...
2 3 4 5 1 nth it shouldn't be created. It is already in the second iteration.
So, by this manner creations should end at most 120th trial.
Can you help me solve this? I'm using randperm
Thank you.
  2 个评论
Guillaume
Guillaume 2019-7-12
randperm doesn't keep track of previously generated permutations, so it's never going to be useful for this.
Why can't you just generate at once the 120 permutations (with perm) and shuffle them if needed?

此问题已关闭。

回答（2 个）

Brendan Hamm
Brendan Hamm 2019-7-12
p = perms(1:5);
idx = randi([1,size(p,1)]);
selection = p(idx,:)
Yigitalp Ozmen
Yigitalp Ozmen 2019-7-12
Thank you for your answers. What about for bigger numbers such as 10. Matlab cant generate 10!. But maybe it can generate permutations different from previous ones. Is it achivable?

此问题已关闭。

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by