MATLAB: Generate N observations from a uniform distribution on [0,1] and compare it to a threshold

Question

 We simulate this experiment by generating a logical array of
 length N, with 1 (true) for "heads" and 0 (false) for "tails". 
 The problem is to generate the right number of 1s and 0s, so that
 the percentage of 1s is p (60%). We shall do so in two ways.
 N=1000;                  // number of coin tosses
 p=0.6;                   // bias: percentage of 1s in the array
 Method 1
Generate N observations from a uniform distribution on [0,1]. 
Threshold these observations at p. The resulting logical array
will have 
 1 if an observation was < p, 
 0 otherwise.

Answer 1

Here's another way. Let there be N1 trues and N0 falses.

x = [repmat(true,1,N1),repmat(false,1,N0)];
x = x(randperm(N1+N0));