i having trouble workflow because sourcing multiple scripts in rmarkdown, of require package dplyr , of use plyr.
the problem rename function exists in both packages , if dplyr attached rename function in plyr won't work.
how include in scripts function checks if dplyr attached, and, if is, detach it?
i know how detach packages via detach("package:dplyr", unload = true). don't know how check if package attached or not.
i agree best approach use dplyr::rename , plyr::rename explicitely call function want.
however, if did want check if package attached, , detatch use
if("plyr" %in% (.packages())){ detach("package:plyr", unload=true) } 