x-axis: true allele size — positive = expansion, negative = contraction.
Left panel: distribution of the selected metric in each x bin (box = median and IQR).
Right panel: fraction of alleles in each category of that metric.
Gray: tool produced no allele sequence for this allele.
Green: the best category — see per-metric meanings below.
Yellow → red: increasingly wrong.
Metrics:
  • "edit distance (bp)" — raw Levenshtein distance between the reported and truth sequences. Green means the bases match exactly.
  • "normalized" — the same distance divided by the length of the true allele sequence, so a 5bp error counts differently on a 40bp allele than on a 4kb one.
  • "size difference (bp)" — reported allele length minus true allele length. The box plot keeps the sign (negative = the tool called the allele too short, positive = too long), while the categories bin its absolute value. Green means only that the length matched; the bases can still differ, so this is a weaker claim than the edit distance.