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

Asked by Tom Edwards on 12 Oct 2019

Latest activity Answered by Jos (10584) on 12 Oct 2019

2 views (last 30 days)

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

0 Comments

1 Answer

Link

Answer by Jos (10584) on 12 Oct 2019

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

You are now following this question

Tom Edwards (view profile)