The method may further include maintaining a similarity matrix with {HEAD ~ entries} corresponding to {TAIL ~ the average profile similarity} between two channels during a given time period 
corresponding to
The method may further include maintaining a similarity matrix with { HEAD ~ entries } corresponding to { TAIL ~ the average profile similarity } between two channels during a given time period
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH