calculate an in degree ratio by dividing {HEAD ~ a number} of {TAIL ~ in degree correlation coefficients} above a second threshold by a total number of in degree correlation coefficients 
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calculate an in degree ratio by dividing { HEAD ~ a number } of { TAIL ~ in degree correlation coefficients } above a second threshold by a total number of in degree correlation coefficients
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH