A little simpler answer than the others. Look at package Namespaces. When a package is created, the NAMESPACE file defines which functions in the package are exported (i.e. available for you to use), the other functions are "private" to the package meaning that other functions in the package can call those functions, but they are not meant to be called directly by the user.
So in your case, the `selenium` function was exported, but `java_check` was not exported. The function does exist, but R's regular search rules do not find it when you try to call it directly (but because it shares the Namespace with selenium, it is found when called there). It is possible to call non-exported functions (use something like RSelenium:::java_check()), but non-exported functions are not usually documented and subject to change without any warning. You are using the functionality in a way different from how the author intended, so there are no guarantees that it will do what you think it should. On Thu, Jan 19, 2023 at 3:28 PM akshay kulkarni <akshay...@hotmail.com> wrote: > > dear members, > I am using the RSelenium package which uses the > function selenium() from the wdman package. The selenium function contains > the function java_check at line 12. If I try to run it, it throws an error: > > > javapath <- java_check() > Error in java_check() : could not find function "java_check" > > Also: > > > exists("java_check") > [1] FALSE > > But when I run selenium(), it works fine.... > > How do you explain this conundrum? You can refer to this link: > https://github.com/ropensci/wdman/issues/15 > > Specifically what concept of R explains this weird behaviour? > > Thanking you, > Yours sincerely, > AKSHAY M KULKARNI > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. -- Gregory (Greg) L. Snow Ph.D. 538...@gmail.com ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.