Figure 2.

Number of optimal classes and test of neutrality. (Left) The optimal number of classes (number of Dirichlet mixture components) is determined by the minimum of the posterior evidence of the fit. Results are for alginate. (Right) Main time intervals are determined by each class in single substrates. The time window is determined considering consecutive samples classified in the same class (i.e., sparse samples misclassified are non-indicated, see Figure 1 for details). For chitin, the whole interval is indicated since no clear time-windows are defined. Pseudo p-values of the HDP test for each class found in pure substrates for the complete and local models are indicated.