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

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Bear 2014-11-23

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评论： Bear 2014-11-27

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.

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Star Strider 2014-11-23

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The easiest way:

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

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Bear 2014-11-25

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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Roger Stafford 2014-11-23

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Or perhaps you want them in random order:

   x = zeros(1,m+n);
   p = randperm(1:m+n,n);
   x(p) = ones(1,n);

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Azzi Abdelmalek 2014-11-25

在 MATLAB Online 中打开

There is an error in

p = randperm(1:m+n,n);

Roger Stafford 2014-11-26

在 MATLAB Online 中打开

Yes, it should have been

p = randperm(m+n,n);

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Azzi Abdelmalek 2014-11-23

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https://ww2.mathworks.cn/matlabcentral/answers/163970-create-a-binary-sequence-that-consisting-of-m-zeros-and-n-ones-in-any-order#answer_159960

编辑：Azzi Abdelmalek 2014-11-23

在 MATLAB Online 中打开

x1=[zeros(1,5) ones(1,4)]

%or

N=5;
n=4;
X1=1:n+N>N

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Bear 2014-11-25

Thank you. That was what I asked for.

Bear 2014-11-27

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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