On 12-11-01 4:14 AM, Jan van der Laan wrote:
I have a r-script (rook.R) that starts a Rook server. To present users
from having to start R and type in source("rook.R"), I want to create
a bash script and bat file that starts R and sources the script.
However, to keep the Rook server running R should not close after
running the script and stay in interactive mode. This proves more
difficult than expected.
I tried various combinations of commandline parameters and pipes, but
none of them seem to work:
$R -f rook.R --interactive
Runs and quits
$ cat rook.R | R
Fatal error: you must specify '--save', '--no-save' or '--vanilla'
$cat rook.R | R --no-save
Runs and quits
$R --no-save < rook.R
Runs and quits
$R --no-save --interactive < rook.R
Runs and quits
I would have expected the --interactive parameter to do what I want,
but it doesn't seem to do anything.
What does work is to create a .Rprofile with sourc("rook.R") in it in
the directory and then start R (just plain R). However I don't find
this a very elegant solution. I could of create the .Rprofile file in
the bash script which is somewhat better, but still not very elegant.
I end up with the following bash script:
#!/bin/bash
echo "source(\"rook.R\")" > .Rprofile
R
Another, not very elegant, possible solution which I haven't tried is
to start a while loop at the end of the script with a sleep command in
it.
Does there exist a better solution?
Yes, don't use a script, use a package. Packages can run startup code
when they load. Then include your package among those loaded by
default. See the ?options help on defaultPackages for how to do that
via environment variable.
Duncan Murdoch
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