how to randomize the column position of a matrix?

2 次查看（过去 30 天）

Daud 2012-9-9

suppose A=[D G H K ... O];

i want to do C=[H D O .... G.. K]

i also want to keep the information about the order of randomization to use it other matrix further manipulation.

Dishant Arora 2012-9-9

ind=randperm(size(A,2));
C=zeros(size(A));
C=A(:,ind);

ind preserves the order of randomization.

Jan 2012-9-9

编辑：Jan 2012-9-9

The pre-allocation by zeros is useless here. A pre-allocation is useful only, if the array would grow iteratively.

Dishant Arora 2012-9-9

Thanks jan, I must take care of it in future.

MATLAB Language Fundamentals Matrices and Arrays Matrix Indexing

在 Help Center 和 File Exchange 中查找有关 Matrix Indexing 的更多信息

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

Translated by