echo "=== PLINK MAF分布 ==="
awk 'NR>1 {
  maf=$5;
  if(maf<0.001) a++;
  else if(maf<0.005) b++;
  else if(maf<0.01) c++;
  else if(maf<0.05) d++;
  else e++;
} END {
  total=NR-1;
  print "MAF<0.001: " a " (" a/total*100 "%)";
  print "0.001≤MAF<0.005: " b " (" b/total*100 "%)";
  print "0.005≤MAF<0.01: " c " (" c/total*100 "%)";
  print "0.01≤MAF<0.05: " d " (" d/total*100 "%)";
  print "MAF≥0.05: " e " (" e/total*100 "%)";
}' new_spectrum.frqx