get.data                Parsing the data file.
normalize               Normalize the microbiome dataset prior to
                        perform the permutation test.
optimize                Optimization for detection of features with
                        larger variation between classes
permutation             Permutation-based non-parametric analysis to
                        infer differential abundance of features
                        between groups.
plots                   Plotting the features with differential
                        abundance.
size.effect             Executing estimation statistics based on
                        bootstrap-coupled approach
