Discrete probabilities initialization

All the discrete probabilities including the initial sub-class probabilities $\{\pi_m, \; 1\leq m \leq L\}$, the segment size probabilities $\{ \rho_{m,i}, \; \; 1\leq m \leq L, \; 1\leq i \leq n\}$, and the sub-class transition probabilities ${\bf A}_{i,j}$, were intitialized to flat (uniform) distributions. Software for this purpose is given in Section 14.4.2