[R] Sweave : change value in rnw file to generate multiple "single" reports ?

Gabor Grothendieck ggrothendieck at gmail.com
Mon Dec 10 17:44:02 CET 2007

The ability to pass arguments on the

R CMD Sweave

line is something I would very much like to have as well.

Currently you need to create a shell or batch file that accepts
the arguments, place those into environment variables using shell
or batch code and then run sweave.  R code in your swevae file
would then read the environment variables using Sys.getenv.

On Dec 10, 2007 11:25 AM, Ptit_Bleu <ptit_bleu at yahoo.fr> wrote:
> Hello,
> I'm still trying to make the life of my colleagues easier. Nice, isn't it ?
> At the moment, I'm looking for a way to generate multiple "single report".
> In fact I have a .rnw file which send a query to a MySQL database
> (rs<-dbSendQuery(con, statement="select * from treatdata where
> name='Device1'")
> But of course my colleagues have many devices and don't want to enter the
> rnw file to change the name of the device.
> Is there a way to pass arguments to Sweave like Sweave("myfile.rnw",
> namevar="Device2") and it will change namevar by Device2 into the file
> myfile.rnw before creating the .tex file ?
> Or is it possible to do it via another language, that is: loading the rnw
> file, modifying it, saving it and finally calling Sweave ?
> Whatever the solution, I need you help. In advance thank you.
> Ptit Bleu.
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