Figure 4.

Unsupervised clustering of selected genera abundances separates PDAC from benign samples. The phylogenic tree clustering learned from 135 genera is shown in the x-axis. The y-axis shows the individual samples, which are separated into two major clusters, as shown by the dendrogram on the left. The colour key code is a graphic representation of centre-log ratio (CLR) abundance that uses all taxon read counts within a sample divided by this geometric mean, and the log fold changes in this ratio between samples are compared. If the abundance of a bacteria is lower than the mean CLR value, then it will be negative (blue), and if it is higher, then it will be positive (red).