清空筛选条件
清空筛选条件

matrix - change columns randomly

4 次查看（过去 30 天）
Jonny
Jonny 2011-10-16
评论： Ruchi Agarwal 2020-1-7
Hi, how can I change randomly the positions of entire columns in a matrix [nxm]? For example, I want to change my matrix
A=[ 1 2 3 5 4 ;
2 2 2 2 2 ;
4 5 6 7 7 ;
8 9 8 8 8 ;
9 9 9 9 9 ]; to change into
B=[ 3 5 4 2 1;
2 2 2 2 2;
6 7 7 5 4;
8 8 8 9 8;
9 9 9 9 9];
Thank you :)

请先登录，再回答此问题。

回答（1 个）

Wayne King
Wayne King 2011-10-16
A random shuffling of the columns of A. One way:
cols = size(A,2);
P = randperm(cols);
B = A(:,P);

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