Fig. 4
Comparing taxonomic abundance of the ground truth metagenomic data with that of the classified data. Scatterplots show the comparison between the simulated metagenomic data (ground truth, x-axis) and classified reads (y-axis). Data is plotted as a percentage of classified reads for the classified data, and a percentage of simulated reads for the ground-truth data. The data has been transformed by log10. A y = x line (shown in red) has been added to demonstrate how data points would appear on the graph if the number of ground-truth and classified reads were the same. A linear regression has been added (shown in blue) and used to calculate the R2 statistic, see Fig. 6. Comparisons are shown at the Phylum, Family, Genus and Species levels, for the Hungate, Mini, RefSeq, RUG, RefRUG and RefHun reference databases