backward                Infer the backward probabilities for all the
                        nodes of the dagHMM
baumWelch               Inferring the parameters of a dag 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 dag
                        should be traversed during the backward
                        pass(leaves to roots)
calc_emis               Calculating the probability of occurance of
                        particular values of covariates at a node given
                        the value of target.
forward                 Infer the forward probabilities for all the
                        nodes of the dagHMM
fwd_seq_gen             Calculate the order in which nodes in the dag
                        should be traversed during the forward
                        pass(roots to leaves)
gen_emis                Generating the inital emission probability
                        distribution of the covariates in TAN
                        structure.
initHMM                 Initializing dagHMM with given parameters
noisy_or                Calculating the probability of transition from
                        multiple nodes to given node in the dag
