Generate a N length vector from a M length list (permutation)

1 次查看（过去 30 天）
Yue Zhang
Yue Zhang 2019-9-2
评论： Yue Zhang 2019-9-2
I have want to generate a 5-element vector:
A = [a1, a2, a3, a4, a5]
such that each element (a1...a5) could take on one of the three values [1, 2, 3];
There should be 3^5 number of outputs.
It should be easy but i have been trying for the last 90 minutes and got no luck.
  4 个评论
显示 2更早的评论
Yue Zhang
Yue Zhang 2019-9-2
No. [1, 1, 1, 1, 2] and [1, 1, 1, 1, 2] should not be two different outputs. However [1, 1, 1, 1, 2] and [1, 1, 1, 2, 1] should.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（2 个）

Walter Roberson
Walter Roberson 2019-9-2
[Ac{1:5}] = ndgrid(1:3);
result = cell2mat(cellfun(@(M) M(:), Ac, 'uniform', 0));
Andrei Bobrov
Andrei Bobrov 2019-9-2
out = fullfact(3*ones(1,5));

类别

在 Help Center 和 File Exchange 中查找有关 Creating and Concatenating Matrices 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by