Find the common number in rows?

Say

A = [1 2 3;
     1 4 6;
     7 8 1;
     6 3 1]

The common number in every row is 1. I want to output the result with all other number except the common number, 1. Desired result is

[2 3 4 6 7 8]

repeated numbers are shown once only. As I know, this can be achieved using 'unique(A)'. But I dunno how to get rid of the common number. Thank you all for help!

Answer 1

[Azzi Abdelmalek]

A = [1 2 3; 1 4 6; 7 8 1; 6 3 1]; 
[ii,jj,kk]=unique(sort(A,2))
setdiff(ii,ii(histc(kk,1:numel(ii))==size(A,1)))

Or

[ii,jj,kk]=unique(sort(A,2))
out=ii(histc(kk,1:numel(ii))<size(A,1))

Answer 2

[Azzi Abdelmalek]

A = [1 2 3; 1 4 6; 7 8 1; 6 3 1]
B=A(2:end,:);
idx=arrayfun(@(x)  all(any(ismember(B,x),2)),A(1,:))
out=setdiff(unique(B),A(idx))

Answer 3

[the cyclist]

Here is a straightforward method:

A = [1 2 3;
     1 4 6;
     7 8 1;
     6 3 1];

common = A(1,:);

for nr = 2:size(A,1)
    common = intersect(common,A(nr,:));
end

result = setdiff(A,common)