Do you want a 1x10 matrix containing random values from M? There are a number of ways to do this.
Using randint, you need to check the documentation. Like the error says, the third parameter requires a 1x2 vector [low,high]. Since your vector M happens to have a pattern, you could use:
Data = randint(1, 10, [1 4]) * 2;
But this isn't very nice because it makes assumptions about M.
Why don't you instead use randint to generate a 1x10 matrix of random indices into M?
