R help - Sep 2012 - Sweave - if \Sexpr{} than \SweaveInput{"my.Rnw"}

Depending on an R computation I would like to include an Sweave documents
in the main Sweave document.
How can I do it?

So I was thinking .... to use Latex features :

\newif\ifpaper

\ifpaper

\SweaveInput{"my1.Rnw"}
\else
 \SweaveInput{"my2.Rnw"}
\fi

But how do I set paper to true or false given an \Sexpr ??

\papertrue % or

\paperfalse


Any ideas?


cheers


-- 
Witold Eryk Wolski

Triemlistrasse 155
8047 Zuerich

	[[alternative HTML version deleted]]

On 20/09/2012 8:47 AM, Witold E Wolski wrote:
> Depending on an R computation I would like to include an Sweave documents
> in the main Sweave document.
> How can I do it?
>
> So I was thinking .... to use Latex features :
>
> \newif\ifpaper
>
> \ifpaper
>
> \SweaveInput{"my1.Rnw"}
> \else
>   \SweaveInput{"my2.Rnw"}
> \fi
>
> But how do I set paper to true or false given an \Sexpr ??
>
> \papertrue % or
>
> \paperfalse
>
>
> Any ideas?
The SweaveInput directives are processed before any expressions are 
evaluated, so you can't do it that way.  You can have Sweave chunks emit 
LaTex code, so this might achieve a similar effect:

<<results=tex>>if ( test ) name <- "my1"
else name <- "my2"

Sweave( paste0(name, ".Rnw") )
paste0("\\input{", name, ".tex}")
@

I've never tried having a Sweave chunk call Sweave(), so there might be 
troubles there, and you might only be able to input .tex files, not Rnw 
files.

Duncan Murdoch

If you want to program Sweave documents, you can try the knitr
package. This case will be something like:

<<>>paper <- TRUE # or change it to FALSE
@

<<child=if (paper) 'my1.Rnw' else 'my2.Rnw'>>@

i.e. you use the logical variable 'paper' to control which child
document to include in the parent document. See
http://yihui.name/knitr/

Regards,
Yihui
--
Yihui Xie <xieyihui at gmail.com>
Phone: 515-294-2465 Web: http://yihui.name
Department of Statistics, Iowa State University
2215 Snedecor Hall, Ames, IA


On Thu, Sep 20, 2012 at 7:47 AM, Witold E Wolski <wewolski at gmail.com>
wrote:
> Depending on an R computation I would like to include an Sweave documents
> in the main Sweave document.
> How can I do it?
>
> So I was thinking .... to use Latex features :
>
> \newif\ifpaper
>
> \ifpaper
>
> \SweaveInput{"my1.Rnw"}
> \else
>  \SweaveInput{"my2.Rnw"}
> \fi
>
> But how do I set paper to true or false given an \Sexpr ??
>
> \papertrue % or
>
> \paperfalse
>
>
> Any ideas?
>
>
> cheers
>
>
> --
> Witold Eryk Wolski
>
> Triemlistrasse 155
> 8047 Zuerich