MATLAB: Create a binary sequence that consisting of m zeros and n ones in any order.

binary sequence

I need help to program a matlab code to generate a binary sequence that contains m zeros and n ones. I created a N lengths of zero, x1=zeros(1,N), but how to add n ones into the sequence of zeros.

Best Answer

The easiest way:

x1 = [zeros(1,N)  ones(1,M)];

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MATLAB: How to make a matrix elements randomly distributed

Try this out (adapt the values to your needs):

m = 10;
n = 3;
pos = randperm(m*n,m);
M = zeros(m,n);
M(pos) = 1;

M =

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

M has the ones randomly distributed.

MATLAB: Generate the binary sequence

Maybe I'm misunderstanding something but to me it looks like your code is wrong, it's missing for ex. 0 1 0 1 as an output.

The simplest way to obtain all unique permutations of a sequence is:

m = 2; n = 2;
seqs = unique(perms([zeros(1, m) ones(1, n)]), 'rows')

There are indeed 6 combinations, but not the ones you return in your example.

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MATLAB: How to make a matrix elements randomly distributed

MATLAB: Generate the binary sequence

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