Figure 3.

Unbiased clustering of spectral density profiles. (A) Heatmap and hierarchical clustering of spectral density profiles for trees simulated under eight evolutionary scenarios. Stars indicate bootstrap support ≥0.9. The color scheme (cyan, blue, and violet) distinguish the three clusters determined by partitioning around medoids. Shades of the same color further distinguish clusters with divisions identified by hierarchical clustering using bootstrap probability support. Hierarchical clustering is not shown below a threshold value of 2. (B) Boxplot of spectral density profile summary statistics for trees belonging to each cluster based on medoid partitioning. (C) Simulated trees within each cluster plotted into multidimensional space defined by spectral density profile summary statistics.