Taxonomic classification accuracy on two mock metagenomics communities. (A) Classification sensitivity and precision at six major taxonomic ranks for two real data sets. For visualization purposes, genus-level accuracy values for Kaiju and DIAMOND on the MiSeq data set (sensitivity: 0.7414 and 0.7177; precision: 0.9526 and 0.9530, respectively) have been omitted. (B) The corresponding breakdown per species of the percentage of correct, incorrect, and unclassified reads at the genus level.