detect_const_cols       Detect if any column of a data.frame has
                        constant values.
detect_dupl_cols        Detect if any column of a data.frame is a
                        duplicate of another
frequency_table         Generate frequency of each entry in each column
                        of dataframe
glimpse_to_file         Generate glimpse of dataset
level_of_data           Determine the level / primary key of dataset
percentiles_table       Generate percentiles for entire dataframe
