backward                Infer the backward probabilities for all the
                        nodes of the treeHMM
baumWelch               Inferring the parameters of a tree Hidden
                        Markov Model via the Baum-Welch algorithm
baumWelchRecursion      Implementation of the Baum Welch Algorithm as a
                        special case of EM algorithm
bwd_seq_gen             Calculate the order in which nodes in the tree
                        should be traversed during the backward
                        pass(leaves to roots)
forward                 Infer the forward probabilities for all the
                        nodes of the treeHMM
fwd_seq_gen             Calculate the order in which nodes in the tree
                        should be traversed during the forward
                        pass(roots to leaves)
initHMM                 Initializing treeHMM with given parameters
noisy_or                Calculating the probability of transition from
                        multiple nodes to given node in the tree
