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Creating a matrix containing binary vectors as elements

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David
David 2012-9-22
Based on the dimension n, i want to create a matrix containing binary vectors:
For example with n=1:
A=[[-1],[0],[1]]'
n=2:
A=[[-1,-1],[-1,0],[-1,1],[0,-1],...,[1,1]]
n=3:
A=[[-1,-1,-1,-1],[-1,-1,-1,0],[-1,-1,-1,1],[-1,-1,0,-1],[-1,-1,0,0],...,[1,1,1,1]]'
Since the dimension is the input variable, I don't know how many while- or for-commands i need in advance.
Any suggestions?
  1 个评论
Star Strider
Star Strider 2012-9-22
编辑：Star Strider 2012-9-22
It's not obvious from your question what you want to do.
How are you creating the elements of your vectors?
Is ‘A’ different for each value of n or are you dynamically creating A?
For a start, I suggest you explore creating ‘A’ as cell or perhaps structure data. They may do what you want.

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Rick Rosson
Rick Rosson 2012-9-22
编辑：Rick Rosson 2012-9-22
N = 4;
A = zeros(3^N,N);
for k = 1:N
r = N - k;
v = [ -1*ones(3^r,1) ; zeros(3^r,1) ; ones(3^r,1) ];
A(:,k) = repmat(v,3^(k-1),1);
end

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