List exported objects from R package without attaching it

问题

Is there a way to list the objects that a package exports, without actually attaching it? I tried

ls(loadNamespace("ggplot2"))

However this shows all of the defined and imported objects in this package. Instead I would like to see only the exported names. I.e. I would like the result of

library(ggplot2)
ls("package:ggplot2")

But without actually attaching the package to my search path.

回答1:

You could use documented getNamespaceExports("ggplot2").

回答2:

Ah found it. The undocumented

ls(getNamespaceInfo(mynamespace, "exports"));

Seems to do the trick.

来源：https://stackoverflow.com/questions/9658518/list-exported-objects-from-r-package-without-attaching-it