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

Question

Tom Edwards 2019-10-12

0
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https://ww2.mathworks.cn/matlabcentral/answers/484899-making-an-array-to-simulate-states-of-a-paramagnet-with-values-of-1-1

回答： Jos (10584) 2019-10-12

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