create a binary sequence that consisting of m zeros and n ones in any order.

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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.

Accepted Answer

Star Strider
Star Strider on 23 Nov 2014
The easiest way:
x1 = [zeros(1,N) ones(1,M)];
  1 Comment
Bear
Bear on 25 Nov 2014
Thx alot and it works well, but I forgot to say the zeros and ones have to be placed in random order. Do you have any ideas how to do this.

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More Answers (3)

Roger Stafford
Roger Stafford on 23 Nov 2014
Or perhaps you want them in random order:
x = zeros(1,m+n);
p = randperm(1:m+n,n);
x(p) = ones(1,n);
  4 Comments

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Azzi Abdelmalek
Azzi Abdelmalek on 23 Nov 2014
Edited: Azzi Abdelmalek on 23 Nov 2014
x1=[zeros(1,5) ones(1,4)]
%or
N=5;
n=4;
X1=1:n+N>N
  4 Comments
Bear
Bear on 27 Nov 2014
There is a question on my further programming this code, For example, m=n=2. then the number of combinations of the binary sequence is 6,nchoosek(4,2). My code was fine to output the 6 combinations. However, the combinations are not unique. one or two combinations show twice. Here is the detail of question, you may want to click and take a look. generate the binary sequence Again, thank you for the great helps.

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Jan
Jan on 23 Nov 2014
And another apporach:
x1 = zeros(1, n+m);
x1(n+1:n+m) = 1;

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