Figure 3.

Principal-Component Analysis of Swarm Features

(A and B) (A) PC1 (branch angle, area, perimeter, normalized area, and growing tips) versus PC2 (branch width and radius of minimum bounding circle), and (B) PC2 versus PC3 (branch length, number of primary branches and number of levels) plot for dendritic swarm pattern on BM2, M8, M9, and PGM agar.

(C) Perimeter versus normalized area plot for swarm patterns on BM2, M8, M9, and PGM agar.

Centroids for each medium-specific swarm are indicated in (A–C). See also Figures S2 and S3.