![]() ![]() Timing on child processes is only available on Unix-alikes, and may not be reliable there. The function system.time is available for timing. On POSIX-compliant OSes these commands pass a command-line to a shell: Windows is not POSIX-compliant and there is a separate function shell to do so. The details will differ by platform (see the on-line help), and about all that can safely be assumed is that the first argument will be a string command that will be passed for execution (not necessarily by a shell) and the second argument to system will be internal which if true will collect the output of the command into an R character vector. 5.13 External pointers and weak referencesĪccess to operating system functions is via the R functions system and system2.5.11.2 Calculating numerical derivatives.5.9.10 Semi-internal convenience functions.5.9.1 Handling the effects of garbage collection.5.4.3 Linking to native routines in other packages.5.4.2 Example: converting a package to use registration. ![]()
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