get_fixed               This function subsets the sample-by-variable
                        dataframe to the "fixed" (i.e., non-permuted)
                        data. This subset should include ID variables,
                        sex, and genotypic covariates.
get_pairPerm            This function samples individuals by pairs for
                        permuting phenotype vectors in the
                        paired-permutation function (sipPair.R)
get_pairPermDF          This function recombines the fixed data and
                        permuted data in the paired-permutation
                        function (sipPair.R) into a permuted
                        sample-by-variable data frame.
get_permDF              This function recombines the fixed data and
                        permuted data into a permuted
                        sample-by-variable data frame.
get_permIdx             This function samples indices for permuting
                        phenotype vectors in the basic permutation
                        function (sip.R) and for permuting leftover
                        unpaired individuals in the paired-permutation
                        function (sipPair.R).
get_permute             This function subsets the sample-by-variable
                        data frame to the permutable data. This subset
                        should include phenotypes and phenotypic
                        covariates.
get_relCat              This function infers relatedness categories in
                        the paired-permutation function (sip_pair.R)
                        prior to permutation.
get_relPairs            This function pairs individuals in the
                        paired-permutation function (sip_pair.R) into
                        the most highly-related pairs possible.
get_sexDF               This function divides the sample-by-variable
                        data frame into males and females prior to
                        permutation within sexes.
get_singSamp            This function checks for uneven numbers of
                        individuals within relatedness category and
                        creates a data set for permuting single samples
                        that will not be pair permuted (sip_pair.R).
order_permDF            This function reorders the permuted
                        sample-by-variable data frame to match the ID
                        order of the primary sample-by-variable data
                        frame.
phenotype_IBD_correlation
                        Phenotype-IBD correlation
plot_phenotype_correlations
                        Phenotype correlation plot
sip                     Single-iteration permutation for large-scale
                        biobank data
sipPair_exampleData     Single-iteration paired permutation phenotype
                        and covariate data
sipPair_relatednessData
                        Single-iteration paired permutation relatedness
                        data
sip_exampleData         Single-iteration permutation phenotype and
                        covariate data
sip_pair                Single-iteration paired permutation for
                        large-scale biobank data with relatedness
