| Sys.which {base} | R Documentation |
This is an interface to the system command which.
Sys.which(names)
names |
Character vector of names of possible executables. |
The system command which reports on the full names of an
executable (including an executable script) found on the current path.
A character vector of the same length as names, named by
names. The elements are either the full path to the
executable/script or "" if no executable of that name was
found.
## the first two are likely to exist everywhere
## texi2dvi exists on most Unix-alikes and under MiKTeX
Sys.which(c("ftp", "ping", "texi2dvi", "this-does-not-exist"))