else
{
GraphLine thr = aa[graphStretch].getThreshold();
+
+ // possible alternative for interactive selection - threshold gives 'ceiling' for forming a cluster
+ // when a row+column is selected, farthest common ancestor less than thr is used to compute cluster
int currentX = getColumnForXPos(evt.getX());
ContactMatrixI matrix = av.getContactMatrix(aa[graphStretch]);
if (matrix!=null)