rearrange matrix elements randomly

I have a matrix and what i want to do is reorder the matrix elements/entries in a random order. for example if the matrix was :

A= [ 1 2 3;

4 5 6;

7 8 9]

i would like the elements randomly re-arranged, for example:

A = [ 6 9 1

2 5 7

3 8 4]

I would like to do it without using fors to do it more efficiently.

Answer 1

[Ameer Hamza]

A_new = reshape(A(randperm(numel(A))), size(A))

[Mireia Boneta Camí]

thanks, it's perfect!

[Ameer Hamza]

I am glad to be of help!

Answer 2

[KSSV]

Read about randperm. With this you can get random indices/ numbers. Let A be your matrix.

[m,n] = size(A) ; 
idx = randperm(m*n) ; 
A = reshape(A(idx),m,n) ; 

[Mireia Boneta Camí]

thanks, randperm it's a good discovery