Replacing 2 elements with each other randomly?

Like : a=[2 4 5 242 24] ------> a'=[2 242 5 4 24]

my code is :

rndm= myset(randperm(length(myset),2))
    neighbor=myset;
    dummy=myset(rndm(1));
    neighbor(rndm(1))= myset(rndm(2));
    neighbor(rndm(2))=dummy

It is working but sometimes i get out of bounds error. Because the myset vector includes elements like 234. If big numbers elements (like 242) have chosen by randomly then rndm(1) will be equal to 242. So myset(242) is out of bounds for sure.

Answer 1

[the cyclist]

a = [2 4 5 242 24];

r = randperm(length(a));

b = a;
b([r(1) r(2)]) = a([r(2) r(1)]);

[IBM watson]

Thanks!

[the cyclist]

I didn't look at your solution carefully, but it looks like the only essential difference is that you did

rndm = myset(randperm(length(myset),2))

where you should have done just

rndm = randperm(length(myset),2)