k_tau                   Kendall's tau for two vector observations
null_perm               Procedure for estimating the null distribution
                        of the TRC tau with the m value chosen by the
                        proposed rule.
null_perm_m0            Procedure for estimating the null distribution
                        of the TRC tau with a given m value
rho                     Pearson's correlation for two vector
                        observations
trc_cor_test            Procedure for calculating p-values
trc_m_search            Procedure for the choice of m for the TRC tau
trc_tau                 Trucated Rank Correlation
