Generate random non-repeating integers from a small range

Question

What I\'m trying to accomplish is the following:

I wish to create a vector of integers, from a relatively small range, and ensure that none of the integers will be f

Answer 1

Do not regenerate the sequence every time, but fix the repetitions. E.g.:

function result = nonRepeatingRand(top, count)

    result = randi(top, 1, count);

    ind = (diff(result) == 0);
    while any(ind)
        result(ind) = [];
        result(end + 1 : count) = randi(top, 1, count - numel(result));

        ind = (diff(result) == 0);
    end

end

On my machine, this generates a non-repeating sequence of 10 million numbers out of 1:5 in 1.6 seconds.