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

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

Answer 1

[Bruno Luong]

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

[Arjun M]

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