f we get 2 best pairs, just take the 1st</span>
0108     second = max(clust1(1),clust2(1)); 
0109     untested(first,second) = 2;    untested(first,second) = 2;     <span class="comment">% mark that we're trying this one</span>
0110     set(handle_img, <span class="string">'CData'</span>, triu(untested)); title([<span class="string">'Trying '</span> num2str(first) <span class="string">' and '</span> num2str(second)]); drawnow;
0111     
0112     <span class="comment">% Is this aggregation allowed?</span>
01