With flatten = FALSE, a structured S3 object is returned. The S3 object only has one slot, which is called levels. This contains a named list. Each name refers to package from the call to parallelRegisterLevels(), while the entries are character vectors of the form “package.level”. With flatten = TRUE, a simple character vector is returned that contains all concatenated entries of levels from above.

parallelGetRegisteredLevels(flatten = FALSE)



Flatten to character vector or not? See description. Default is FALSE.


RegisteredLevels | character. See above.