**Figure 6:** Stochastic evolution of the number of clusters during 200K
iterations of the simulation (panel A) and the resulting histogram after
discarding the first 75K iterations as burn-in (panel B). After reaching
equilibrium, the number of clusters fluctuates around a mean of
approximately 43 clusters. In general, the estimated number of clusters is
much smaller than the truncation level (K = 200, see y-axis in panel A). The
histogram in panel B approximates the posterior distribution of the number
of clusters given the data matrix Y. |