swapping elements in matlab?

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.

Answer 1

[Suneesh]

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)