Standardise dependencies using the same logical as install.packages
standardise_dep(x)The dependencies to standardise. A character vector (selecting from "Depends", "Imports", "LinkingTo", "Suggests", or "Enhances"), or a logical vector.
TRUE is shorthand for "Depends", "Imports", "LinkingTo" and
"Suggests". NA is shorthand for "Depends", "Imports" and "LinkingTo"
and is the default. FALSE is shorthand for no dependencies.
http://r-pkgs.had.co.nz/description.html#dependencies for additional information on what each dependency type means.