[R] slow R start up

[Gabor Grothendieck]

Or you could call those other programs from within R.  See
?system


On 11/7/05, Stuart Macgregor <stuart.macgregor at qimr.edu.au> wrote:
> Hi,
>   I want to use R within a unix shell script where I repeatedly open
> and close R (doing some computation within R whilst it is open). i.e.
> something like
>
> #!/bin/sh
> R --vanilla << EOF
> # some R commands
> EOF
> # some unix commands
> R --vanilla << EOF
> # some R commands
> EOF
> # some unix commands
> ...etc
>
> the problem is that since I open and close R many times, the shell
> script takes a long time to run (R takes ~1 second to start up, even on
> a fast machine; I've tried various linux installations and versions of R
> from 1.7 to 2.2). Is there some way of making R start up faster? I've
> tried altering the memory start options but this makes little
> difference.
> Note I have various other programs called from the shell script and
> don't want to do everything from "within" R.
> One possible solution may be to send the relevant commands to an already
> running copy of R but I've yet to figure out how to achieve this.
>
> Any suggestions gratefully received.
>
> Stuart.
>
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