MATLAB: Swapping elements in matlab

swapping elements

How would I swap elements randomly in matlab? E.G I have a matrix M=Randi(3,10); and I want to swap its elements/cells around randomly.

M=randi(3,10);

M can then be linear indexed by the set [1,30] since there are 30 elements. So you could get a RANDom PERMnutation of that by using RANDPERM.

idx = randperm(30)

Then

Mnew = M([idx]);

and shape up Mnew

Mnew = reshape(Mnew,3,10)

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

To sort the elements of a vector randomly you can use the RANDPERM() function.

RANDPERM(n) returns a random permutation of the integers 1:n.

a = [1 2 3 4 5];
a_rand = a(randperm(length(a)));