[R] Name conflict between Epi and ROC packages

Vincent Carey 525-2265
2005-12-15T17:07:00Z

apparently there is already a namespace for ROC.  so
whenever you need disambiguation and want to select the
function defined in ROC, use ROC::f
where "f" names a function in ROC package, and "f" is
also used in another package on the searchlist.