How can I generate all possible combinations of a vector containing specific numbers in it?

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Arjun M 2021-4-3

评论： Arjun M 2021-4-3

For example, consider this vector A

A = [1 1 1 0 0 0 0 0].

I need all combinations of this vector so that there are 3 ones and 5 zeros. the number of combinations is 56 here.

I tried using randperm but I'm getting repeated vectors.

Kindly help solve this

Bruno Luong 2021-4-3

J=nchoosek(1:8,3);
[m,n]=size(J);
I=repmat((1:m)',1,n);
accumarray([I(:) J(:)],1)

Arjun M 2021-4-3

Wow thanks. That's exactly what I was looking for.

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