R help - Apr 2012 - system command to a specific shell (bash)

I need to run a bash command, but when you call system() the default shell
is sh (see my sessionInfo below).
I found the shell command (
http://www.stat.ucl.ac.be/ISdidactique/Rhelp/library/base/html/shell.html)
but it seems to be disappeared in current versions of R?
I am running all this from R CMD BATCH  with "system" calls to other R
scripts.

For a little more info, I'm generating sphinx documents (a python
documentation library) through R and need to use a python virtual
environment.
So I need to call system('source bin/activate'), but "source"
isn't a
recognized command in the sh shell...


Any help is appreciated,

Justin
> sessionInfo()
R version 2.15.0 (2012-03-30)
Platform: x86_64-pc-linux-gnu (64-bit)

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C
LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8
 [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8    LC_PAPER=C
          LC_NAME=C
 [9] LC_ADDRESS=C               LC_TELEPHONE=C
LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C

attached base packages:
[1] graphics  grDevices utils     datasets  stats     grid      methods
base

other attached packages:
[1] ggplot2_0.9.0  reshape2_1.2.1 plyr_1.7.1

loaded via a namespace (and not attached):
 [1] colorspace_1.1-1   dichromat_1.2-4    digest_0.5.1       MASS_7.3-16
     memoise_0.1        munsell_0.3
 [7] proto_0.3-9.2      RColorBrewer_1.0-5 scales_0.2.0       stringr_0.6
     tools_2.15.0

	[[alternative HTML version deleted]]

You could make a hash bang bash script that sources the file and then proceeds
to do whatever you want. Bourne shell should have no problems invoking another
shell.
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Justin Haynes <jtor14 at gmail.com> wrote:
>I need to run a bash command, but when you call system() the default
>shell
>is sh (see my sessionInfo below).
>I found the shell command (
>http://www.stat.ucl.ac.be/ISdidactique/Rhelp/library/base/html/shell.html)
>but it seems to be disappeared in current versions of R?
>I am running all this from R CMD BATCH  with "system" calls to
other R
>scripts.
>
>For a little more info, I'm generating sphinx documents (a python
>documentation library) through R and need to use a python virtual
>environment.
>So I need to call system('source bin/activate'), but
"source" isn't a
>recognized command in the sh shell...
>
>
>Any help is appreciated,
>
>Justin
>
>> sessionInfo()
>R version 2.15.0 (2012-03-30)
>Platform: x86_64-pc-linux-gnu (64-bit)
>
>locale:
> [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C
>LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8
> [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8    LC_PAPER=C
>          LC_NAME=C
> [9] LC_ADDRESS=C               LC_TELEPHONE=C
>LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
>
>attached base packages:
>[1] graphics  grDevices utils     datasets  stats     grid      methods
>base
>
>other attached packages:
>[1] ggplot2_0.9.0  reshape2_1.2.1 plyr_1.7.1
>
>loaded via a namespace (and not attached):
>[1] colorspace_1.1-1   dichromat_1.2-4    digest_0.5.1      
>MASS_7.3-16
>     memoise_0.1        munsell_0.3
>[7] proto_0.3-9.2      RColorBrewer_1.0-5 scales_0.2.0      
>stringr_0.6
>     tools_2.15.0
>
>	[[alternative HTML version deleted]]
>
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