How can I obtain all possible combinations of a given vector
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subhashree priyadarshini
on 2 Oct 2020
Commented: subhashree priyadarshini
on 2 Oct 2020
I have a vector A=[1 1 1 0 0 1 1]. I want all the possible combinations as following....
A=[1 1 1 0 0 0 0; 1 1 0 0 0 1 0; 1 1 0 0 0 0 1; 0 1 1 0 0 1 0; 0 1 1 0 0 0 1; 0 1 0 0 0 1 1]
4 Comments
Stephen23
on 2 Oct 2020
Edited: Stephen23
on 2 Oct 2020
Why is
0 1 0 0 0 1 1
included, but
0 0 1 0 0 1 1
1 0 0 0 0 1 1
are excluded?
Although you write in your question that you want "all combinations", it seems that you actually want a subset of the combinations, but so far the rules to derive that subset are not clear to me.
Accepted Answer
Stephen23
on 2 Oct 2020
Brute force, not particularly efficient:
>> A = [1,1,1,0,0,1,1];
>> P = unique(bsxfun(@and,A,unique(perms(A),'rows')),'rows');
>> P(sum(P,2)~=3,:)=[]
P =
0 0 1 0 0 1 1
0 1 0 0 0 1 1
0 1 1 0 0 0 1
0 1 1 0 0 1 0
1 0 0 0 0 1 1
1 0 1 0 0 0 1
1 0 1 0 0 1 0
1 1 0 0 0 0 1
1 1 0 0 0 1 0
1 1 1 0 0 0 0
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