MDLEs                   Function to create maximin distance level
                        expanded arrays
OSOAs                   Function to create an OSOA from an OA
OSOAs_LiuLiu            Function to create OSOAs of strengths 2, 3, or
                        4 from an OA
OSOAs_hadamard          function to create a strength 3 OSOA with
                        8-level columns or a strength 3- OSOA with
                        4-level columns from a Hadamard matrix
OSOAs_regular           Function to create an OSOA in s^2 or s^3 levels
                        and s^k runs from a basic number of levels s
                        and a power k
SOAs                    function to create SOAs of strength t with the
                        GOA construction by He and Tang.
SOAs-package            Creation of Stratum (aka Strong) Orthogonal
                        Arrays
SOAs2plus_regular       function to create SOAs of strength 2+ from
                        regular s-level designs
SOAs_8level             Function to create 8-level SOAs according to
                        Shi and Tang 2020
Spattern                functions to evaluate stratification properties
                        of (O)SOAs and GSOAs
contr.FFbHelmert        Full-factorial-based real-valued contrasts for
                        s^el levels
contr.Power             A contrast function based on regular factorials
                        for number of levels a prime or prime power
contr.TianXu            A complex-valued contrast function for s^el
                        levels based on powers of the s-th root of the
                        unity
createSaturated         Function to create a regular saturated strength
                        2 array
fastSP                  Function for fast calculation of stratification
                        pattern according to Tian and Xu 2023
guide_SOAs              Utility function for inspecting available SOAs
                        for which the user need not provide an OA
guide_SOAs_from_OA      Utility function for inspecting SOAs obtainable
                        from an OA
mbound_LiuLiu           bound for number of columns for LiuLiu OSOAs
ocheck                  functions to evaluate low order projection
                        properties of (O)SOAs
phi_optimize            function to optimize the phi_p value of an
                        array by level permutation
phi_p                   Functions to evaluate space filling of an array
print.SOA               Print Methods
util_fastSP             unexported functions to support fast
                        calculation of the stratification pattern with
                        fastSP and fastSP.k
