//eliminates otus below rare cutoff
if (totalAbund <= nseqs) { for (int j = 0; j < newRabunds.size(); j++) { newRabunds[j].pop_back(); } }
//eliminates otus below rare cutoff
if (totalAbund <= nseqs) { for (int j = 0; j < newRabunds.size(); j++) { newRabunds[j].pop_back(); } }