Fig. 2

Convex hull distance (CHD) performance. a Time taken by the comparison of 20 files with a variable number of sequences. b Comparison of filtering performance of four methods. c Boxplot of the divergence between the CHD and the actual minimal distance (dark grey) in the viral dataset, as well as the upper bound and the maximal distance (light grey). d Divergence percentage between the observed minimal distance and the CHD, for raw samples (continuous line) and samples partitioned into two clusters (dashed line)