Generating n bit random numbers with each bit sampled N times.

I want to generate a random sequence of n bits, and each bit is to be sampled by 100 samples. Although i have generated the n bit sequence, how should i sample each bit.

bin_seq = randi([0 1],1,num_bit);

This is what i wrote for generating the n bit sequence where num_bit is the bumber of bits.(20 in my case)

[Jan]

What does this mean: "each bit is to be sampled by 100 samples"?

Do you want to repeat each value 100 times? Then use repelem.

[kiran bharadwaj]

Yes that was what i wanted. Didnt know about the 'repelem' command. Thanks a lot!!

Answer 1

[Jan]

bin_seq = randi([0 1], 1, num_bit);
result  = repelem(bin_seq, 1, 100);

Alternatively:

result = reshape(repmat(bin_seq, 100, 1), 1, []);

Answer 2

[Bruno Luong]

n=8; % number of bits
r=10; % number of bit repetitions, 100 in your case
m=20; % number of sequenes (>=r)
i=zeros(r,n);
for k=1:n
    i(:,k) = randperm(m,r);
end
j=repmat(1:n,[r,1]);
b=accumarray([i(:),j(:)],1,[m n]);
disp(b)

     1     0     0     1     1     1     1     1
     1     1     0     1     0     0     0     0
     0     1     1     0     1     1     1     1
     0     1     0     1     1     0     0     0
     1     0     0     0     0     0     1     0
     1     0     1     0     0     0     0     1
     1     1     1     1     0     1     0     0
     0     0     1     1     1     0     1     1
     0     1     1     0     1     1     1     0
     0     1     1     1     1     1     1     1
     0     0     0     0     0     0     1     0
     0     0     0     0     0     1     0     1
     1     1     0     1     0     0     0     0
     0     1     0     0     0     0     1     0
     0     0     1     0     1     0     0     1
     1     1     1     1     0     0     0     1
     1     1     1     0     1     1     0     0
     1     0     1     0     1     1     1     1
     0     0     0     1     0     1     1     1
     1     0     0     1     1     1     0     0

sum(b,1)

ans = 1×8

10 10 10 10 10 10 10 10