MATLAB: Find the common number in rows

find common number

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!

Best Answer

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))
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