The main function of this package allows numerical vector objects to
be displayed with their values in vulgar fractional form. This is convenient if
patterns can then be more easily detected. In some cases replacing the components
of a numeric vector by a rational approximation can also be expected to remove
some component of round-off error. The main functions form a re-implementation
of the functions 'fractions' and 'rational' of the MASS package, but using a
radically improved programming strategy.