age_calculate           Calculate age between two dates
age_from_chi            Extract age from the CHI number
area_lookup             Codes and names of Scottish geographical and
                        administrative areas.
chi_check               Check the validity of a CHI number
chi_pad                 Add a leading zero to nine-digit CHI numbers
create_age_groups       Create age groups
dob_from_chi            Extract Date of Birth (DoB) from the CHI number
extract_fin_year        Extract the formatted financial year from a
                        date
file_size               Calculate file size
format_postcode         Format a postcode
make_inheritance_checks
                        Check that a set of arguments inherits from a
                        set of classes Throws an exception if one
                        argument does not pass the checks. Argument
                        must have AT LEAST ONE of the specified classes
                        to pass.
match_area              Translate geography codes into area names
phsmethods              'phsmethods' package
qtr                     Assign a date to a quarter
sex_from_chi            Extract sex from the CHI number
