making an array to simulate states of a paramagnet with values of -1,+1.

I want to make an array containing only the values 1 and -1. It should be randomly generated so as to get a random number of occurences of both values.

I made the following but I feel like its way too complicated. Is there a simpler way? thanks

x = randi ([-1,1],1,n) ;
  for k = 1 : n
        if x (k) == 0
            r = rand ;
            if r > 0.5
                x(k) = 1 ;
            else
                x(k) = -1;
            end
        end
    end

Answer 1

[Jos (10584)]

Create a random vector with two values and map those to -1 and 1. An easy solution (with n=10):

x = 2 * randi([0 1], 1, 10) - 1