Hi Roland,
thanks for your answere. I actually tried out a different, smaller  
Latex-header and the sweave-process suddenly worked. So I copied parts 
of the old header into the new one, to check what part is causing the 
trouble. In the end I had two documents with identical content.  The new 
document worked fine with Sweave the other still gave out the 
error-message. If anybody has experienced that problem before, and knows 
an answere, please let me know.
Unfortunaetly I also still have an encoding problem with the new documt, 
that ran through Sweave. If I use  "ISO-8859-15" fontencoding in my 
editor and "latin1" for input encoding in my Latex-document everything 
works fine. If I keep both in "utf8", as I would like it, german mutated 
vowels (Umlaute) aren't displayed correctly.

Rau, Roland schrieb:
> Hi Gerrit,
>
>   
>> -----Original Message-----
>> From: r-help-bounces@r-project.org 
>> [mailto:r-help-bounces@r-project.org] On Behalf Of Gerrit Voigt
>> Sent: Monday, January 19, 2009 4:48 PM
>> To: r-help@r-project.org
>> Subject: [R] Sweave encoding problem
>>
>> Hello,
>> Sweave seems to have trouble processing german letters in R.
>> For example, my noweb R-input looks like this.
>> <<>>=
>> Oberflächenfehler = c(4, 11, 6, 2, 7, 9)
>> @
>> If I send it through Sweave, I get the following error message.
>>
>> error:  chunk 1
>> Error in parse(text = chunk) : unexpected input in "OberflÃ¤"
>> extra: Warning message:
>> In readLines(f[1]) :
>>    underfull last line in "C:\...."
>>
>> (my R is in german, so I needed to translate the error 
>> message myself.)
>>
>> I got the impression, that this is an encoding issue of 
>> Sweave, since  
>> the input typed into R directly works just fine. The encoding 
>> I use in  
>> my noweb document is utf8.
>>     
>
> I don't think it has something to do with German letters.
> I saved the following text in a file 'sweavy.Snw':
> \documentclass{article}
>
> \begin{document}
> Hello World!
>
> <<>>=
> 1+1
> @ 
>
> <<>>=
> Oberflächenfehler = c(4, 11, 6, 2, 7, 9)
> @
> \end{document}
>
> This is what happened in R:
>   
>> library(utils)
>> Sweave("sweavy.Snw")
>>     
> Writing to file sweavy.tex
> Processing code chunks ...
>  1 : echo term verbatim
>  2 : echo term verbatim
>
> You can now run LaTeX on 'sweavy.tex'
>   
>> sessionInfo()
>>     
> R version 2.7.0 (2008-04-22) 
> i386-pc-mingw32 
>
> locale:
> LC_COLLATE=English_United States.1252;LC_CTYPE=English_United States.1252;LC_MONETARY=English_United States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base     
>
> And also the dvi looked fine after processing "latex sweavy.tex"
> To make things sure, I did in my editor (GNU Emacs 22.1.50.1)
> C-x RET f utf-8
> to change 
> set-buffer-file-coding-system to utf-8.
> Still works fine.
>
> Maybe this helps you further to track down the reason for the problem?!?
>
> Best,
> Roland
>
> ----------
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>
>
>   


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