CODEWITHSUNDEEP
r
user320602
user320602

Reputation: 71

Pass commands to a running R-Runtime

Is there a way to pass commands (from a shell) to an already running R-runtime/R-GUI, without copy and past.

So far I only know how to call R via shell with the -f or -e options, but in both cases a new R-Runtime will process the R-Script or R-Command I passed to it.

I rather would like to have an open R-Runtime waiting for commands passed to it via whatever connection is possible.

Upvotes: 2

Views: 485

Answers (3)

davidski
davidski

Reputation: 581

You could try simply saving the workspace from one session and manually loading it into the other one (or any kind of variation on this theme, like saving only the objects you share between the 2 sessions with saveRDS or similar). That would require some extra load and save commands but you could automatise this further by adding some lines in your .RProfile file that is executed at the beginning of every R session. Here is some more detailed information about R on startup. But I guess it all highly depends on what are you doing inside the R sessions. hth

Upvotes: 0

Dirk is no longer here
Dirk is no longer here

Reputation: 368231

What you ask for cannot be done. R is single threaded and has a single REPL aka Read-eval-print loop which is, say, attached to a single input as e.g. the console in the GUI, or stdin if you pipe into R. But never two.

Unless you use something else as e.g. the most excellent Rserve which (when hosted on an OS other than Windoze) can handle multiple concurrent requests over tcp/ip. You may however have to write your custom connection. Examples for Java, C++ and R exist in the Rserve documentation.

Upvotes: 7

teucer
teucer

Reputation: 6238

You can use Rterm (under C:\Program Files\R\R-2.10.1\bin in Windows and R version 2.10.1). Or you can start R from the shell typing "R" (if the shell does not recognize the command you need to modify your path).

Upvotes: 0

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