[R] Input encoding problem when using sweave with xetex

[Duncan Murdoch]

On 12/05/2010 2:29 PM, Erich Studerus wrote:
> Thank you! I edited the Sweave.sh file and it works now for reading data 
> stored as R data files, but the read.xls function from the gdata-package 
> does no longer work.
>
> options('encoding'='UTF-8')
> require(gdata)
> read.xls("http://www.schwerhoerigkeit.pop.ch/hoergeraete_test.xls", 
> stringsAsFactors = F)[2,2]
>
> This gives NA as output and a warning that there was an invalid entry for 
> the connection. Is there a way to use read.xls with UTF-8 encoding?
>   

I don't know, you'd have to ask its authors.  But you can probably set 
options(encoding="") before calling it.  (I'm assuming the read.xls() is 
in a code chunk in your Sweave file.  I would guess that you don't need 
to set the encoding back to UTF-8 afterwards, but you might:  it all 
depends on when Sweave() opens its
output file.)

Duncan Murdoch
>
>
>
>
> On Wed, 12 May 2010 12:45:51 -0400
>   Duncan Murdoch <murdoch.duncan at gmail.com> wrote:
> > On 12/05/2010 11:36 AM, Erich Studerus wrote:
> >> Putting \usepackage[cp1252]{inputenc} into my preamble is not an option,
> >> because XeTeX unlike LaTeX needs UTF-8 has input encoding. My goal is also
> >> to have a LyX document that can be compiled both on Mac and Windows.
> >>
> >> I usually compile my Lyx-Sweave documents by one click of a button from
> >> within Lyx. R code chunks are therefore executed by calling R from the
> >> command line. If anybody knows how to run R with options(encoding="UTF-8")
> >> from the command line under windows, that would be helpful.
> >>
> >> The command that calls R during compilation is contained in this file:
> >> http://cran.r-project.org/contrib/extra/lyx/preferences
> >>   
> > 
> > 
> > You can do it with a little work.  If you look at the rhome/bin/Sweave.sh 
> >file, you'll see that
> > 
> > R CMD Sweave file.Rnw
> > 
> > just executes something like
> > 
> > echo "library(\"utils\"); Sweave(\"file.Rnw\")" | R --no-restore --slave
> > 
> > What you want is to execute
> > 
> > echo "library(\"utils\"); options(encoding="UTF-8"); Sweave(\"file.Rnw\")" 
> >| R --no-restore --slave
> > 
> > You could edit the rhome/bin/Sweave.sh file appropriately if you always 
> >want Sweave to use UTF-8, or you could edit your Lyx preference file to put 
> >in a line like this instead of what it had.
> > 
> > Duncan Murdoch
>
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